problem with nlsLM.....
dear JN,
nlsr seems to impress me....But I have posted a different but related problem I am facing with nls(please check the mail list of today(21/03/2019 - 5:45 Indian standard time)). Can nlsr help me in this case too?
very many thanks for your time and effort...
yours sincerely,
AKSHAY M KULKARNI
From: J C Nash <profjcnash at gmail.com>
Sent: Wednesday, March 20, 2019 6:15 PM
To: akshay kulkarni; R help Mailing list
Subject: Re: [R] Fw: problem with nlsLM.....
Sent: Wednesday, March 20, 2019 6:15 PM
To: akshay kulkarni; R help Mailing list
Subject: Re: [R] Fw: problem with nlsLM.....
Of course, you might just try a more powerful approach. Duncan responded to the obvious issue earlier, but the second problem seems to need the analytic derivatives of the nlsr package. Note that nlsLM uses the SAME very simple forward difference derivative approximation for the Jacobian. Optimization folk will generally say "singular Jacobian" and the singular values reported by nlsr show how bad the case is here. Note that the nlsr output summary seems to imply that the singular values are associated with specific parameters. My bad -- I wanted to keep the summary tidy. The sv's apply to the problem in general, but there are as many of them as parameters, so they fit on the page nicely where I've put them. The singularity leads to no standard errors, of course. JN >> library(nlsr) >> nonlin_modDH5 <- nlxb(formulaDH5, start = list(a = 0.43143, b = 0.68173,A = 0.09,w = 0.8,c = 0.01,C = 0.94)) > vn:[1] "HM1" "a" "b" "HM2" "A" "w" "HM3" "c" "C" > no weights >> nonlin_modDH5 > nlsr object: x > residual sumsquares = 0.66987 on 680 observations > after 15 Jacobian and 20 function evaluations > name coeff SE tstat pval gradient JSingval > a 0.0929101 NA NA NA -5.817e-07 42.97 > b 0.541246 NA NA NA -3.359e-07 7.043 > A 0.00921275 NA NA NA 9.42e-08 0.984 > w 0.545654 NA NA NA -8.693e-09 0.195 > c -0.770181 NA NA NA -5.2e-09 0.07464 > C 0.60148 NA NA NA -5.817e-07 7.567e-14 >> On 2019-03-20 4:20 a.m., akshay kulkarni wrote: > dear members, > I think Duncan's solution is not working...I've checked the function again: > >> formulaDH5 <- as.formula(HM1 ~ (a + (b * ((HM2 + 0.3)^(1/2)))) + (A*sin(w*HM3 + c) + C)) >> nonlin_modDH5 <- nls(formulaDH5, start = list(a = 0.43143, b = 0.68173,A = 0.09,w = 0.8,c = 0.01,C = 0.94)) > Error in nlsModel(formula, mf, start, wts) : > singular gradient matrix at initial parameter estimates >> nonlin_modDH5 <- nlsLM(formulaDH5, start = list(a = 0.43143, b = 0.68173,A = 0.09,w = 0.8,c = 0.01,C = 0.94)) > Error in nlsModel(formula, mf, start, wts) : > singular gradient matrix at initial parameter estimates > > > I've checked the Internet for a method of getting the starting values, but they are not comprehensive....any resources for how to find the starting values? > >> dput(HM1) > c(1.01484280343579, 0.977004104656811, 1.02448653468064, 1.01562102015533, > 0.968359321714289, 0.99105072887847, 0.99384582083167, 1.00579414727333, > 0.967593120445675, 1.04694148058855, 1.03832347454026, 0.971040156128456, > 0.976967848281943, 0.990386686964446, 1.02257020722784, 0.994529161072552, > 1.05361176882747, 0.988021514764882, 0.998909692369571, 1.04933819895509, > 0.988354009297047, 0.878584020586706, 1.01438895222572, 1.01522203155842, > 0.999979601913003, 0.975862934766315, 1.03948445565434, 1.02493339899053, > 0.972267168470219, 0.971001051421653, 1.03066167719129, 0.967898970631469, > 0.976606662010519, 0.990061873979734, 1.03398666689317, 1.05491455733517, > 0.995997711923663, 0.991213393857838, 0.9903216916016, 1.06850794640807, > 1.01345738121581, 0.877847194198055, 0.992124544661245, 1.00927272338804, > 0.988196514422814, 0.987504905313256, 0.990274516132497, 1.01484624802751, > 0.9800176904083, 0.969321725342799, 1.07407427451262, 1.02023130729371, > 0.975827723120998, 0.988260886231393, 1.05116598585815, 0.977996171738906, > 0.985118207891832, 0.98243346941999, 0.991380612684958, 1.00960741365585, > 1.03062446605116, 1.04176358759364, 1.02494798972349, 1.04645592406625, > 0.999998705820515, 0.972161829098397, 0.991313521356105, 1.0211561076261, > 0.971257832217016, 1.00935026461508, 0.997140402835885, 1.00719609467891, > 0.97483865743955, 0.987491380127905, 1.0643888147255, 1.00804564512905, > 0.989366232219398, 0.942042386899482, 1.0140328534339, 0.98812919092058, > 1.04584882138055, 0.970586857498767, 1.0098232311784, 1.02237732533005, > 0.99306513943649, 0.963808401790738, 1.03577231048959, 1.00540101137939, > 0.970458918298484, 0.973460294926879, 0.992676651187501, 1.04079931972326, > 0.988928168736541, 0.986376934855979, 1.04117941173535, 1.01252015337269, > 0.920578394310677, 0.98933093765412, 0.98116698970429, 0.995498900493761, > 0.96463760451942, 1.1059686605887, 1.03366353582116, 0.981256131441973, > 1.0152599452654, 0.995362080418312, 0.997276311537458, 0.943438355295013, > 1.04025117202718, 1.03102737097366, 1.02096902615856, 1.02506560388494, > 0.959364103040633, 0.987217067188943, 1.00454456275356, 1.03517749036747, > 1.0148342900634, 0.974518005568706, 1.02515903830848, 1.00435361604303, > 0.973400954462685, 0.981702992961201, 1.0155969247203, 1.01064154947471, > 0.957131570492054, 0.88504625471737, 1.01849907662046, 1.01503806358198, > 0.987004149653273, 0.974485857983481, 0.987572979379099, 1.0037529762248, > 0.976026658183349, 0.983176178747953, 1.03812943411666, 1.01828203593425, > 0.984139742592733, 1.00377243020886, 1.02118652563454, 1.01115776483144, > 0.98387406692053, 0.985919715423209, 0.989550590454508, 1.01845373071313, > 1.00394660346757, 0.949076679285431, 1.06094051230739, 0.981940494629297, > 0.982812578115724, 0.929673163266673, 1.05359335975355, 1.03498999963467, > 0.989218608625026, 0.994412680504384, 1.03162650392014, 1.04359975620911, > 0.96938669600183, 0.987150178669349, 0.990503131271205, 1.01120231626779, > 0.977334529946535, 0.966013274319284, 1.04966722359666, 1.04745672849702, > 0.960799643211444, 0.866626315091455, 1.01316731305781, 1.02919067036911, > 0.988567285725018, 0.978702298855537, 1.0186604054056, 1.01398864226215, > 0.985492431198792, 1.03982326960775, 1.02287049736119, 1.02357106122821, > 0.977519287403578, 0.993818572820706, 1.01139405704906, 1.02683235508704, > 0.943370973180458, 0.970153991236375, 0.970746163945049, 1.00996886938921, > 0.970599365922215, 1.03230385881209, 1.02072718512322, 1.0161024503161, > 0.987718207880278, 0.987512809150475, 1.04108232940019, 1.0153758143276, > 1.03916475100072, 0.959776942350879, 1.01739288375256, 1.05438479662213, > 0.970479916939806, 0.979826128477137, 0.982800613999074, 0.977050857426291, > 0.977474025608337, 0.972905352371901, 1.02191626900472, 1.02737043327345, > 0.987565251408109, 0.93131925605196, 0.991469304659888, 0.949708678221412, > 0.948662234856045, 0.938158485016718, 1.02342896552764, 1.01869899424866, > 1.01244484998263, 0.990637832491416, 1.04591108144934, 0.951244278685872, > 0.977265525807748, 0.942206977147219, 1.09440128638859, 1.02935716108991, > 0.978428723706514, 1.08589930790608, 1.0015813231405, 1.07512822987239, > 0.976356469419301, 0.972775004620642, 1.00954673593815, 0.992551447194369, > 0.985819189451289, 0.975310750212573, 1.05999783258221, 1.07815688799274, > 0.959648862885262, 1.03418767541976, 1.07207529899183, 1.04949264142055, > 0.966872387358102, 0.963564695272614, 1.01310836328613, 0.996622968927382, > 1.00202486063801, 0.948215304098709, 1.02845448262427, 0.987124642586768, > 0.999269328077687, 0.964674178364545, 0.991913103743918, 0.970556592778505, > 0.979495816235886, 0.949160643807912, 0.999611005677085, 1.01697727168167, > 0.966362681248743, 0.938703012004999, 1.01394761650376, 1.011369485146, > 0.975929406359934, 0.97111480362557, 1.0581474202687, 1.03965938660391, > 0.990447147628825, 0.967286377976687, 0.968162001740811, 1.00573452177125, > 0.974628505381728, 0.983183640545729, 1.08185959707149, 0.976533333333333, > 0.932582771965921, 1.02205682784386, 1.02162002635618, 1.00634335266967, > 1.03045302554561, 1.05015537832235, 1.0238800474742, 1.0151188247761, > 0.951176244898346, 0.937999477475998, 0.986664690881963, 1.00889938014614, > 0.972546365957459, 0.937560562249233, 0.953227957137494, 0.964284336810156, > 0.977909815090698, 0.988068102557503, 1.04429493287078, 1.01803069781624, > 0.957632272450841, 0.971991500790857, 0.98209395086599, 1.02815448263624, > 0.947227198465786, 0.941538843776026, 1.05745885548346, 1.01671992454154, > 0.983992269183969, 0.951511089781983, 1.0110983382201, 1.00912039359684, > 1.14741321154181, 0.985344569298617, 0.986725720078838, 1.03117619992574, > 1.21391930217405, 0.997217690041687, 1.07387278335981, 1.02108776576674, > 1.10313006343474, 1.10905015571117, 1.03999508931616, 1.03976033898847, > 1.02524837903366, 0.984818521675578, 1.04179889608739, 0.975154632188378, > 0.969607959579886, 1.02781726918172, 0.999963290601752, 1.01515310515696, > 1.00520167771997, 0.984550628692601, 1.01902810624565, 1.00685219196689, > 0.982173452231062, 0.999629285915004, 0.970558368481076, 0.995716235126211, > 1.01314341676203, 1.02075675497478, 1.01128668171558, 1.05844449406008, > 1.02510935720045, 0.983720171349822, 0.844396082698583, 1.05810846093782, > 0.99048977314373, 0.971262209252963, 0.968530578900656, 1.04638759101296, > 1.1799017507928, 0.898448146333193, 1.01160891745375, 1.01132611427775, > 0.973840647644128, 1.04683923857471, 0.990344793003927, 1.0068683076688, > 0.992798241837764, 0.99368375299494, 1.01200003722717, 1.0294016781563, > 1.01547984207734, 1.04807175686468, 0.981737356425208, 1.06169292627851, > 1.00518291863648, 0.976808854545251, 0.999321592083517, 0.97527078961014, > 0.904376968942001, 0.987807226191329, 1.0350293488462, 1.02802944623052, > 0.963692701708712, 0.998027399233401, 1.01762747994825, 1.0361812777154, > 0.988298193013531, 1.04174794125517, 0.970839140069407, 1.0011387710754, > 0.961691863428911, 1.02272120871699, 1.00519180537531, 0.999331326197155, > 0.988055521308447, 1.00078630058504, 1.03915754537212, 0.971719181925134, > 0.947846525645955, 0.955178087494908, 1.0019107391621, 1.01160524115586, > 0.984958748948305, 0.967579294820259, 1.00552471207069, 1.04518978636097, > 1.01810784117456, 0.993552343701494, 1.03535983577691, 0.982973964981781, > 0.976175417305875, 0.971173421374951, 1.02622192154044, 1.06169292627851, > 0.980316131595686, 0.98802873807095, 1.02522486330609, 1.01920704714191, > 0.987730950969463, 0.972320506142784, 1.02950031603837, 1.01481027236895, > 1.05066348592531, 0.941412086703545, 1.00426249434292, 0.997599618540051, > 0.9727707483253, 0.987822018689403, 1.00496006171741, 1.00365488022554, > 0.982021737672154, 0.946014836456916, 0.977232083157459, 1.04246004468132, > 0.981228463109654, 0.971195860055527, 0.957569129533581, 0.987312165664453, > 0.955583610052133, 0.991173211015633, 0.988434021882053, 0.94971029297998, > 1.02260060019826, 0.986729432665294, 1.00044978044626, 1.00283798105021, > 0.97876379280085, 0.948623031823408, 1.02317511219612, 1.02274213461243, > 0.952138762776323, 0.974014522860041, 1.02874293788325, 1.02108205408977, > 0.950582622331241, 0.986098109021331, 1.00098916530354, 1.05435029523389, > 0.999921440746985, 0.964778188342829, 1.02087753056688, 1.0295810738595, > 0.981181990342875, 0.94981916198993, 1.00828646284387, 1.01127872412662, > 0.976192285243012, 0.95032633282931, 1.02884118341175, 1.01603776783957, > 0.952947066257398, 0.988924105443658, 1.02727453593468, 1.02944328284254, > 0.970561666318556, 0.982859453938812, 0.995886713501412, 1.04330648532137, > 0.991844865771659, 0.99159250467833, 1.0332159700053, 0.993864541664301, > 0.952716253755034, 0.960889912140351, 0.945669021854222, 0.985578531230794, > 0.975053113912155, 0.999552576905685, 1.02526821151208, 1.00450298718514, > 0.948193972002236, 0.99358065264941, 1.04855364680554, 0.982181523974446, > 0.957570494265717, 0.989249667650167, 1.01928030167592, 0.977392376116208, > 0.98989833978368, 0.950312758756191, 1.01179069272545, 1.03630963397181, > 0.997439452068598, 0.981793158114732, 0.98560918506727, 1.0497573745934, > 1.06729226949522, 0.987962794653476, 1.05655507163022, 1.01896087310511, > 0.985627836611195, 1.03148215915346, 1.07268555224398, 1.00116324087534, > 1.0353274520202, 0.965843323254256, 0.981731445105197, 1.01927876056569, > 0.999117162412819, 0.984262994383997, 1.0058994935294, 1.03100765642408, > 0.970000664632288, 0.974667000854514, 1.02683721041632, 1.00224180239507, > 0.976488446884133, 0.989129579180466, 1.01111944121172, 1.01081759149299, > 0.990822520380867, 0.951849309560414, 1.0533258785109, 1.02605855087945, > 0.993203883495146, 1.01231349444546, 1.05040134097269, 0.988195090931879, > 0.998324259112233, 0.955268105597824, 1.01179535756103, 1.00923640076821, > 1.01018973127051, 0.97727388908476, 1.0163531272719, 1.03445181115965, > 0.922709820364792, 1.05034425545701, 0.971929096725562, 1.01600521659268, > 0.989307124797035, 0.966327502991904, 1.0148486097639, 1.00804453317389, > 0.986688556832374, 1.01100519377607, 1.07022911567444, 1.01751745478207, > 1.00395256916996, 1.02666291685486, 1.04306886282915, 0.976284796774505, > 0.873912939480404, 0.985956634379203, 0.966005821428092, 1.01911378235808, > 0.989971040708023, 0.948518684869746, 0.964578663605958, 1.00130118816861, > 1.14681217078448, 0.989198271209915, 0.975831372743337, 0.87134009583841, > 0.999320371256267, 1.04366317607907, 1.0941742251269, 1.04912747347822, > 0.873169695550468, 0.9946703855144, 1.02687904508206, 1.01557590029223, > 0.979039928979583, 0.978199700239161, 0.988038704848986, 0.944583404359117, > 0.97831517569251, 0.9881631354812, 0.990553852862955, 1.05139702349736, > 0.987315661692795, 0.973936995140175, 1.06038641236987, 1.0651525599012, > 0.997891074790299, 0.979657304627723, 0.976638433723023, 0.981157058049022, > 0.974773098042751, 1.04814547433216, 1.02327857487465, 1.01725074945885, > 0.978364366421386, 1.02726007295919, 1.02997589351422, 1.0208112362723, > 0.965389721633011, 1.01152741033802, 1.00352090319123, 0.981151102088714, > 0.986010324656192, 0.97990659165448, 0.990503768576242, 0.985301104774446, > 0.976384165205197, 0.983887706958686, 0.992885571845564, 0.985757622165226, > 0.946874017209482, 0.990962963812142, 1.04319324396693, 1.07354098057006, > 0.984597785175012, 0.97845443949194, 0.963960215777945, 1.06584156194012, > 1.15623372835712, 0.94928101059165, 1.05512096334013, 1.00899261027951, > 1.00760894032175, 0.989021593753401, 1.01442722705518, 1.04495346859144, > 1.00095646335122, 0.958907195434402, 1.02045280866442, 1.00659622664478, > 0.980590749755976, 1.01197688939839, 0.998468538022796, 1.040625279257, > 0.934164344256759, 0.992160161968429, 0.998594942355232, 1.0532781805963, > 0.974144103277039, 0.946253316413415, 1.00623102828924, 0.988787044999963, > 0.987541467770869, 0.999140303075891, 1.05429436081972, 1.01617267860198, > 1.17044068684611, 1.05663112916056, 1.01681282884482, 1.02872692218644, > 1.00738468152863, 1.0222081131894, 1.01817103171172, 1.01222250929532, > 0.97386289237006, 0.987701353725335, 1.00418624697519, 1.0183108729199, > 0.956852868616883, 1.05440980534023, 1.01562402108019, 1.00083274000183, > 0.945641654423597, 0.966367379950251, 1.02020174816679, 1.01151664724635, > 0.940072052642951, 0.991027873457432, 0.984568985852697, 1.02373049431651, > 0.985887377562884, 1.05498951399906, 0.98672427011774, 1.02570399134917, > 1.06987898201568, 1.02648218241568, 0.971175525661877, 1.03211886190237, > 0.992647697074835, 0.986388969656675, 1.02097305537141, 1.04518978636097, > 0.987300416455667, 0.985182286987375, 1.02373433952904, 1.01376295257605, > 0.992398195656577, 0.983765510339449, 1.06154013507033, 1.01312319643703 > ) > > >> dput(HM3) > c(0.196622289085315, -0.0436031046458981, 0.000820037203846464, > 0.392758326108918, 0.0445839547736504, 0.223969403187679, -0.070152338130932, > 0.197471312884591, 0.0498910549108242, -0.620322188497616, 0.488037411730214, > 0.0461937792271113, 0.0051066586622384, 0.413877974790452, -0.154637441642314, > 0.229802002983503, 0.509904610124243, 0.126452664534026, 0.583037470359474, > 0.470621010682895, -0.00578078533090776, -0.457074922218691, > -0.0506356375273661, -0.767302691971105, -0.000822439375515026, > -0.170080770417037, -0.0638533091192526, 0.218492017287635, -0.088210288825341, > -0.389219867379597, 1.23355646106213, -1.78773586807154, 0.0117401974737664, > -0.154882548871051, -2.11547741687211, -0.0638533091192526, -8.18190789706224, > 0.282699360997887, 0.0383693451361519, -0.0638533091192526, 0.832793868600698, > 0.894379977535782, -0.302329357989944, 0.573489523345283, -0.223540700260161, > 0.229802002983503, 0.0239731624923989, 0.556201388601996, -0.112552578411774, > -0.0438764575701239, 0.470621010682895, -4.92500180132548, 0.00309129784132211, > 0.172407876390051, 0.229802002983503, 0.061799194890529, -0.000864150216291216, > -0.0683834224257835, -1.42874041532869, 0.654009227783557, -0.620322188497616, > 0.272034153890376, -0.00558557185457871, 0.229802002983503, -1.53118563423569e-05, > 0.470621010682895, -0.736608540541868, -1.47747441666374, -0.00291475050109709, > -1.56966101463791, 0.362334298169537, -1.41867286052432, -0.0062864890624406, > -0.223090980170635, 0.229802002983503, 0, 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-0.102776844490052) > >> dput(HM2) > c(0.016497438441392, -0.0121005433105642, 0.0340103138875006, > 0.0393128837416979, 0.144718671661076, 0.0775923152157973, 0.000894372752462123, > 0.0129080340603581, -0.0022179741964203, 0.0540058630486591, > 0.0383234745402589, -0.0142841740056228, -0.0113383036972718, > 0.00764362896437113, 0.022570207227843, 0.0892462240318431, 0.060498120257716, > 0.0432525311181986, 0.00222557516581898, 0.0493381989550945, > -0.0116459907029527, -0.112480015005373, 0.0182691285457092, > 0.0248597234825647, 0.00754701511666922, 0.0471476327719148, > 0.0625841102244406, 0.0303698631973417, 0.00781124380799404, > -0.0168950573556397, 0.0473901805181147, 0.00740505106540693, > -0.0152639817574294, 0.00916841478852549, 0.0409730632910991, > 0.0625866632066982, 0.00664005076885597, 0.0103946833001679, > 0.0243728672440622, 0.0722309706115829, 0.0174699387206196, -0.088714507487996, > -0.00504535647738195, 0.00927272338803572, -0.00707755664004029, > 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0.0101015050127517, 0.0425927774526406, 0.0282767872201141, 0.00648039037553307, > 0.0515174537352363, 0.128342038159934, 0.0432170296083376, 0.01871577325763, > 0.122157724187454, 0.0336635358211635, 0.0225239126708406, 0.0183439669703353, > 0.134384074630845, 0.00984528984402488, -0.049573212443543, 0.0459003250172428, > 0.0354638054442889, 0.0209690261585554, 0.0252976241664904, -0.0211582204487595, > 0.00564472281613363, 0.0148258737510351, 0.0428454717776024, > 0.0315492077820927, 0.0628515089974484, 0.034599813272583, 0.00983450218873532, > 0.0790661896510682, 0.076097511515163, 0.015596924720301, 0.010641549474715, > 0.00626447132858588, -0.0752885625254798, 0.0263105739632706, > 0.0336726716607009, 0.0873459584037158, 0.0137508559242068, -0.00705208890843943, > 0.0673463675870221, -0.000264192225152525, 0.0181803111819752, > 0.0415821927667122, 0.0258248658300624, 0.0697171115138401, 0.0609029360829605, > 0.0252388531172213, 0.0120346601757736, 0.0231724225476939, 0.00664147935356364, > 0.00364229190085414, 0.0221357760157817, 0.00873744091784354, > -0.0243757212939979, 0.0609405123073909, -0.0110205054092022, > 0.0570746855530399, -0.0541885933947211, 0.0790835216830754, > 0.0443624834606028, 0.010803474486455, 0.012658784733822, 0.0407444149396382, > 0.0758344977136341, 0.0249648665726016, 0.0706224364244773, 0.0617623493482699, > 0.0157667711676134, 0.159594212558186, 0.10429461374287, 0.0575594583605458, > 0.0629746059562333, 0.187704355999386, -0.121475803700469, 0.0316944060343089, > 0.0446672218032357, 0.0144595666502411, 0.0581713078328564, 0.0240501430003371, > 0.0169003110123663, -0.00441905663049872, 0.0398232696077516, > 0.0488599473848877, 0.0333193570494318, -0.0165383461076467, > 0.0908431754234104, 0.0145316828198416, 0.0268323550870429, -0.00807316790584186, > 0.0643886942067867, 0.0132605944827886, 0.0225125532638365, -0.029400634077785, > 0.0470539042942522, 0.0266903807836804, 0.0216184350463828, -0.00196619725935374, > -0.00896821424676157, 0.0471292741982513, 0.0153758143276018, > 0.0391647510007153, 0.0638918758798112, 0.0350540963584708, 0.0621376260090577, > -0.0235965026923011, 0.0722625556919611, -0.00136537610871872, > 0.00876826451613888, 0.0314000163087439, 0.0327764509794023, > 0.0416905332713813, 0.0287500712769455, 0.0363887020395213, -0.00500079481628151, > 0.0284155664844784, -0.0252462616989099, 0.0448399729520494, > 0.000185492290551008, 0.0334348196455053, 0.0875709173367935, > 0.0351964196451633, 0.232571060368655, 0.1090264053299, 0.0617423514625135, > 0.0768976100544436, -0.0546347871751927, 0.0996882491247678, > 0.0381052389461968, 0.0652248201643501, 0.0858993079060812, 0.0666492513259647, > 0.0751282298723881, -0.0192055466287929, 0.0869162270419438, > 0.0162427091867147, 0.0351089781252477, 0.0226340139536196, 0.0652987163108841, > 0.0779638975412273, 0.117722278377793, -0.0394478774616255, 0.0438529807975176, > 0.0881967320593799, 0.0588214648998437, -0.0184036676567495, > 0.0140741349441621, 0.0161750696830995, 0.0118833913020066, 0.00937605882553054, > -0.0455051243509685, 0.0418377741899513, -0.0112867686098609, > 0.0101123419174794, -0.00470124454451681, 0.000956333395138531, > -0.013981828106854, 0.05549118128867, -0.0224186715153298, 0.0186897582435067, > 0.0169772716816739, -0.0179058332425567, -0.00353064879469387, > 0.0269073443173487, 0.011369485145996, 0.0753871802564881, 0.184940758413157, > 0.0962788588369411, 0.12233382584365, 0.0542611920398092, 0.0470414915942155, > 0.0303505098818263, 0.00573452177124659, 0.00764243118994532, > 0.0586726631015619, 0.106336058543696, -0.0222151019972231, 0.00630121965465554, > 0.0624011763113852, 0.0372172786669568, 0.0226016288240546, 0.0939930244398409, > 0.0767415904317717, 0.0238800474741997, 0.0151188247761029, 0.134843980893931, > -0.0023819116674762, 0.00287890065299971, 0.0303739452657181, > -0.00394798169311598, -0.00886454847938266, 0.0530899335995167, > -0.00526457886952308, 0.100251697020821, 0.0651999010773084, > 0.0618461082131486, 0.0746686396348302, 0.0225108225108226, -0.0228981338001482, > -0.00958321904192527, 0.0301744325038945, 0.0510329188455982, > -0.0184730200018259, 0.0702506964772114, 0.0167199245415362, > 0.0790156649374397, -0.028524529551306, 0.0133581966776628, 0.025585253422798, > 0.172427142313816, 0.0675994203009362, 0.00336311873127013, 0.0493948607018135, > 0.218437612231768, 0.0214594460427004, 0.0907841657749202, 0.0333163617639509, > 0.177206388698409, 0.126401976128862, 0.0399950893161636, 0.0501927169716304, > 0.0893264027232592, 0.0157983828191964, 0.0615798877852506, -0.0197129750106304, > -0.0108884320377597, 0.0480698262099342, 0.00512957625928131, > 0.0157721009527848, 0.00576798852432315, 0.132233222996491, 0.0427798891731844, > 0.0213946620292803, 0.137026176169503, 0.106996875883653, -0.0054111837253851, > 0.0251880361118362, 0.0253902053162975, 0.0270577225980805, 0.0124293785310734, > 0.0743211614709804, 0.0322779541039503, 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-0.0393527714903421, 0.0187532041738799, 0.0120528540944261, > 0.048649745777751, -0.016576662520347, 0.00722036925799145, 0.0532607499622092, > 0.0287269581620362, 0.098387602988942, 0.0515373332109274, -0.00594807446048738, > -0.012996698372473, 0.186569861135154, 0.030123906032987, 0.0853131761769354, > 0.0031929989708665, 0.0555338071316984, 0.0330892102352149, 0.0325300150784036, > -0.00129426068643155, 0.0964465282035648, 0.0748083984068019, > 0.014810272368951, 0.0727362482346641, -0.022994161418619, 0.0176067452321714, > 0.0316353702314177, 0.0366753960255026, 0.132973503081211, 0.00537653915699314, > 0.0293447867014306, 0.00587487992108688, -0.0465459905172109, > -0.0208313288728689, 0.0461567115064294, -0.00992439500984909, > 0.0478692174283319, 0.15870237135342, 0.0555146507925898, 0.0929129911374694, > 0.136269426745194, 0.032515127489143, -0.0177415950997095, 0.0242936475495824, > 0.0128679606829178, 0.00550255711518526, 0.00950135633958283, > -0.0171614203848253, -0.0480106149706695, 0.0436386144400421, > 0.030020737993979, -0.0207207590715261, 0.118800465447344, 0.0287429378832495, > 0.0277036046980229, -0.0326376675279461, 0.0111603851297697, > 0.0168167717634637, 0.0543502952338948, 0.0268780423509474, 0.0244551896836229, > 0.0330102007094411, 0.049560008022367, 0.0830113020712642, -0.0360281667532304, > 0.0254731639150768, 0.019583911716062, 0.0311623362566958, 0.00306244869413074, > 0.0687257755440167, 0.0205871906806436, -0.00980792960340933, > 0.0430516082564022, 0.0402780110730929, 0.0705036986824154, 0.025854270339128, > 0.108621667399996, 0.00718685874587846, 0.0571556864539545, 0.109159849895189, > -0.00840749532166959, 0.0463361727990188, 0.0651635196532618, > 0.107210781390985, 0.134765229575272, 0.00173368529272275, -0.0123735133796356, > -0.0136090591818897, 0.0534703507636681, 0.0252682115120829, > 0.0045029871851435, -0.032195767437093, 0.0467488481089099, 0.0538227606085845, > -0.0118386798369731, -0.0280299494295351, 0.0140538628567341, > 0.0305966571267272, -0.00988880417457172, -0.00202667375935174, > -0.0227460178374512, 0.0117906927254463, 0.0508373391209442, > 0.20565913566541, 0.079177499709108, 0.0422151179934303, 0.084419174697904, > 0.0672922694952164, -0.00562397110021092, 0.0565550716302232, > 0.0189608731051132, 0.0453269153630163, 0.0409743262622376, 0.0726855522439788, > 0.0185422373323943, 0.0700699839671905, -0.00222797184477677, > -0.00250681151008622, 0.0255048645524291, 0.000885511372841601, > 0.0788210113117177, 0.0116542476851704, 0.031007656424076, 0.011572121687957, > 0.00197091513991245, 0.0332881463280234, 0.0115574465474555, > -0.0156436963370336, 0.224908551812914, 0.0160024082692785, 0.0108175914929918, > 0.0850714918317297, -0.0209549958807167, 0.0649434433474199, > 0.0572507308261867, 0.0108695652173913, 0.0149885395421411, 0.0504013409726928, > 0.000985727295810551, 0.00206155161241882, -0.0273818619348245, > 0.0117953575610268, 0.0160740457598691, 0.0439509870338097, 0.000374131432729126, > 0.030965232935552, 0.0680925204656592, -0.040084138491466, 0.0579554457139488, > -0.0280709032744379, 0.0245619981154038, 0.0332658264722017, > 0.0307493365246973, 0.0663529386077719, 0.0108866234143253, 0.0504739490524921, > 0.0110051937760747, 0.114486710683534, 0.0885070446505914, 0.00713719270420306, > 0.027840282585194, 0.0502624411934901, -0.0237152032254946, -0.0783599699259493, > 0.00584404515799187, -0.031333005510123, 0.0191137823580835, > 0.00399073109721866, -0.00489024968946272, -0.00926327094032102, > 0.00380235683181465, 0.157304505375375, 0.0200440859609643, -0.0241686272566629, > -0.0800316610669412, 0.0239679002814968, 0.0538951680014091, > 0.0941742251268998, 0.0521115186872178, -0.123540922378836, 0.0542314864434063, > 0.0343854708502029, 0.0238689195785379, 0.123488443091325, 0.00983601617163751, > -0.00112278368930967, -0.0210112398529677, -0.0179204649311611, > -0.00187219424504028, -0.0094461471370453, 0.0616047615895669, > 0.0582469526595368, 0.00304799229604126, 0.0674836370082559, > 0.0853131761769354, 0.0358226068729712, 0.00994622612345991, > -0.0217167015464964, 0.0526997601984295, -0.0232294161006039, > 0.100227237031891, 0.0294429036389532, 0.0172507494588479, 0.0034823068051, > 0.0322430509250401, 0.0401401293054765, 0.0208112362723038, 0.00561429336771978, > 0.037707481438362, 0.00862436025594276, 0.00476662316192879, > 0.15812712691603, 0.0472541237269534, -0.00949623142375768, 0.00855607871651576, > -0.00281567087439197, 0.0397525174385432, -0.00711442815443551, > -0.00131577619047549, 0.106909062371648, 0.025164340439287, 0.0577629820111593, > 0.0939246700745592, 0.00391223125066969, 0.0124049752133815, > -0.0275935528232096, 0.0762231355953777, 0.181010165393349, -0.0347198712523113, > 0.0678716698457551, 0.0120798630452986, 0.0245162767779995, 0.0498518908504713, > 0.0144272270551826, 0.0449534685914403, 0.000956463351216132, > 0.0460805768375294, 0.0483340329448637, 0.0192578144013228, 0.0713319833154848, > 0.0664774807491022, 0.0136479583643586, 0.047338990736079, -0.00984473290135361, > 0.0791372581960931, 0.0256142818179614, 0.0598611692250246, 0.0265350466465605, > 0.068670703501864, 0.00623102828923622, -0.00469207491878694, > 0.157504094271494, 0.116984111424978, 0.0875878669508734, 0.0161726786019788, > 0.175935713544914, 0.0637705286819113, 0.0197080817743348, 0.0452129305548087, > 0.0233338613388849, 0.0936152099345934, 0.0199808837233982, 0.0274312796611153, > 0.0721161218673364, 0.17082095580651, 0.034052131044711, 0.0512562246908417, > 0.0487107440041036, 0.153481867586958, 0.0213458465510684, 0.0133431492518521, > 0.119009291067923, 0.0253607374472143, 0.0202017481667936, 0.011516647246353, > 0.0339052007553662, 0.0313036367875989, -0.00639827115782904, > 0.0237304943165091, 0.00669172141737004, 0.0854219038259585, > 0.0181012761967982, 0.0372169953336968, 0.219164421366707, 0.0387279347673063, > -0.00326722366281047, 0.0611109647647912, 0.0724982521544455, > 0.0114916829563205, 0.0264328043306142, 0.100227237031891, 0.0694579153964423, > 0.0256998227540187, 0.0937017943889341, 0.0137629525760519, -0.0046036224834336, > 0.0270242177828994, 0.0650551686301645, 0.01402255124967) > > > very many thanks for your time and effort... > yours sincerely > > AKSHAY M KULKARNI > > > ________________________________________ > From: R-help <r-help-bounces at r-project.org> on behalf of akshay kulkarni <akshay_e4 at hotmail.com> > Sent: Wednesday, March 20, 2019 1:32 PM > To: R help Mailing list > Subject: [R] problem with nlsLM..... > > dear members, > Yesterday, Duncan identified a silly mistake in an nls call...in the list of starting values, one of the names of the variable was getting repeated. But I am experiencing the same problem again, with a different formula: > >> formulaDH3 > HM1 ~ (a + (b * ((HM2 + 0.3)^(1/3)))) * (c * log(HM3 + 27)) > > here HM1 is the response variable, and HM2 and HM3 are predictors..... > >> nonlin_modDH3 <- nls(formulaDH3, start = list(a = 0.43143, b = 0.68173,c = 0.02954)) > Error in nlsModel(formula, mf, start, wts) : > singular gradient matrix at initial parameter estimates >> nonlin_modDH3 <- nlsLM(formulaDH3, start = list(a = 0.43143, b = 0.68173,c = 0.02954)) > Error in nlsModel(formula, mf, start, wts) : > singular gradient matrix at initial parameter estimates > > I am using nlsLM function from the minpack.lm package which says that it will converge when nls fails with singular gradient matrix error... > > > Is there again a silly mistake(pardon me again if there is one!), or is the problem serious? If it is serious, any pointers towards a solution? > > very many thanks for your time and effort.... > yours sincerely, > AKSHAY M KULKARNI > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >