R not 'seeing' numbers?!
R FAQ 7.31 strikes again. :-) Michael tmp[3105] == 35.52 [1] FALSE tmp[3105] - 35.52 [1] -7.105427e-15 all.equal(tmp[3105], 35.52) TRUE
On Wed, Nov 16, 2011 at 10:42 AM, oscar <ob266 at cam.ac.uk> wrote:
Hello. I recently came across the extremely strange problem (see below) of R telling me that elements of a list do not exist... I have tried running this small script on 2 computers (Mac OSX 10.7 & Windows 7) running the latest releases or R (2.13.2 on Mac, 2.14.0 on Win). I have tried it both in the standard R console, and in RStudio (v. 0.94.110), and all have the same problem. Any ideas?! ?I'm stumped... Thanks, Oscar. Code (with comments): tmp=seq(20,90,0.005) # I want to find the position of 35.52: which(tmp==35.52) # integer(0) ?-- It's not there?! tmp[3100:3110] # check to see if it's there... # [1] 35.495 35.500 35.505 35.510 35.515 35.520 35.525 35.530 35.535 35.540 35.545 ?-- it is. which(tmp==35.525) # [1] 3106 which(tmp==35.515) # [1] 3104 tmp[3105] # [1] 35.52 # Interestingly: for (i in seq(30.52,50.52,1)) print(paste(i,which(tmp==i))) # works fine... # ... I'm stuck. -- View this message in context: http://r.789695.n4.nabble.com/R-not-seeing-numbers-tp4076766p4076766.html Sent from the R help mailing list archive at Nabble.com.
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