[R] C module causing rounding errors?

[Jeff Newmiller]

Insufficient data. Please read the posting guide, particularly the part about reproducible code.

It might have something to do with "double" vs "float".

"Joseph N. Paulson" <josephpaulson at gmail.com> wrote:

>Hi all!
>
>I am currently writing a C-module for a for loop in which I permute columns
>in a matrix (bootstrapping) and I send a couple of variables into C
>initially. All of it is working, except the initial values I send to R are
>rounded/truncated (I believe rounded).
>
>I am using a 32 bit machine to compile, I am using (I believe) 32 bit R....
>
>While debugging I print the values I am sending to C, and then I print the
>same values using Rprintf and the number gets rounded to 10^-6, which is
>actually causing some errors for me. Is there any way to correct/prevent the
>error?
>
>
>sample output from R
>
> [1,]  1.0000000
> [2,]  1.0256242
> [3,]  1.1826277
> [4,] -0.6937246
> [5,]  1.3633604
>
>sample output from C
>1.000000
>1.025624
>1.182628
>0.693725
>1.363360
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
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>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.

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