Sent from my phone. Please excuse my brevity.
On December 27, 2016 11:39:29 PM PST, PIKAL Petr <petr.pikal at precheza.cz> wrote:
>Hi Jeff.
>
>Yes, if it had been reproducible I would not post it as I had known
>solution myself. (Uff, I hope I used this conditional clause
>correctly).
>
>OTOH your suggestion works and seems to arrive to desired result even
>that you said you do not know what I am talking about. R (and this
>smart community) sometimes surprise me even after quite a long time
>experience.
>
>Thanks.
>Petr
>
>> -----Original Message-----
>> From: Jeff Newmiller [mailto:jdnewmil at dcn.davis.ca.us]
>> Sent: Tuesday, December 27, 2016 4:21 PM
>> To: PIKAL Petr <petr.pikal at precheza.cz>; r-help mailing list
><r-help at r-
>> project.org>
>> Subject: Re: [R] offset in nlme
>>
>> Not reproducible. Tsk!
>>
>> I really don't know what you are taking about, but some ideas are:
>>
>> mySSasymp <- function( doba, Asym, lrc ) {
>> SSasymp(doba, Asym, 0, lrc)
>> }
>>
>> Another idea is to use log( time ) rather than time.
>> --
>> Sent from my phone. Please excuse my brevity.
>>
>> On December 27, 2016 6:47:12 AM PST, PIKAL Petr
><petr.pikal at precheza.cz>
>> wrote:
>> >Dear all
>> >
>> >I would like to fit SSasymp model to some data by nlme. I did not
>find
>> >any clue how to set one of parameters to fixed constant value
>(R0=0).
>> >
>> >One suitable way could be to use SSlogis as it has one parameter
>zero,
>> >however it is not correct AFAIK logistics is defined from -Inf to
>Inf
>> >and my x value is time, starting from 0.
>> >
>> >The only option I found is to define my own growth function which is
>> >constrained by some fixed starting point. Does anybody know other
>way
>> >around? Like persuading nlme not optimize R0 and be happy with the
>> >value set in the function call.
>> >
>> >something like
>> >
>> >nlsList(rutrtg ~ SSasymp(doba, Asym, R0, lrc), data=rutil.g,
>> >start=c(Asym=100, R0= 10, lrc=-2), offset=c(R0=10))
>> >
>> >which obviously does not work.
>> >
>> >I could put some data but it is more a matter of nlme or other R
>> >functions then real data.
>> >
>> >Looking forward to some answer.
>> >Happy New year 2017
>> >
>> >Petr Pikal
>> >
>> >________________________________
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>________________________________
>Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou
>ur?eny pouze jeho adres?t?m.
>Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav?
>neprodlen? jeho odes?latele. Obsah tohoto emailu i s p??lohami a jeho
>kopie vyma?te ze sv?ho syst?mu.
>Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento
>email jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat.
>Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou
>modifikacemi ?i zpo?d?n?m p?enosu e-mailu.
>
>V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?:
>- vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en?
>smlouvy, a to z jak?hokoliv d?vodu i bez uveden? d?vodu.
>- a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn?
>p?ijmout; Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky
>ze strany p??jemce s dodatkem ?i odchylkou.
>- trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve
>v?slovn?m dosa?en?m shody na v?ech jej?ch n?le?itostech.
>- odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za
>spole?nost ??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn?
>zmocn?n nebo p?semn? pov??en a takov? pov??en? nebo pln? moc byly
>adres?tovi tohoto emailu p??padn? osob?, kterou adres?t zastupuje,
>p?edlo?eny nebo jejich existence je adres?tovi ?i osob? j?m zastoupen?
>zn?m?.
>
>This e-mail and any documents attached to it may be confidential and
>are intended only for its intended recipients.
>If you received this e-mail by mistake, please immediately inform its
>sender. Delete the contents of this e-mail with all attachments and its
>copies from your system.
>If you are not the intended recipient of this e-mail, you are not
>authorized to use, disseminate, copy or disclose this e-mail in any
>manner.
>The sender of this e-mail shall not be liable for any possible damage
>caused by modifications of the e-mail or by delay with transfer of the
>email.
>
>In case that this e-mail forms part of business dealings:
>- the sender reserves the right to end negotiations about entering into
>a contract in any time, for any reason, and without stating any
>reasoning.
>- if the e-mail contains an offer, the recipient is entitled to
>immediately accept such offer; The sender of this e-mail (offer)
>excludes any acceptance of the offer on the part of the recipient
>containing any amendment or variation.
>- the sender insists on that the respective contract is concluded only
>upon an express mutual agreement on all its aspects.
>- the sender of this e-mail informs that he/she is not authorized to
>enter into any contracts on behalf of the company except for cases in
>which he/she is expressly authorized to do so in writing, and such
>authorization or power of attorney is submitted to the recipient or the
>person represented by the recipient, or the existence of such
>authorization is known to the recipient of the person represented by
>the recipient.