[R] problems with integrate ... arguments
rvaradhan at jhmi.edu
Thu Apr 9 16:19:08 CEST 2009
Your function f() is already vectorized, and it works well (see below). Therefore, you don't need to create f2().
f = function(x, const) 2^x + const
testval = 2
> integrate(f, 0.5, 1, const=testval)
1.845111 with absolute error < 2.0e-14
Ravi Varadhan, Ph.D.
Division of Geriatric Medicine and Gerontology
School of Medicine
Johns Hopkins University
Ph. (410) 502-2619
email: rvaradhan at jhmi.edu
----- Original Message -----
From: Richard Morey <R.D.Morey at rug.nl>
Date: Thursday, April 9, 2009 8:10 am
Subject: [R] problems with integrate ... arguments
To: r-help at r-project.org
> Hi everyone,
> I saw this problem dealt with here:
> but no one answered that request that I can tell. I'm having the same
> problem. I'm having problems passing arguments to functions that I'd
> like to integrate. I could swear this worked in the past, but I can't
> get it to work now. I'm running R on Windows.
> Here's my toy code to reproduce the problem:
> #  "R version 2.8.1 (2008-12-22)"
> #  4 6 10 18 34
> # The vectorized function seems to work right.
> # Works. Returns
> # 1.845111 with absolute error < 2.0e-14
> # Doesn't work. Returns
> # Error in eval(expr, envir, enclos) :
> # ..1 used in an incorrect context, no ... to look in
> I understand that I don't have to Vectorize this function for it to
> work, but the more complicated functions I'm using require Vectorization.
> Why can't I pass the argument "const" as a variable, instead of a value?
> I don't understand this error.
> Thanks in advance,
> Richard Morey
> Richard D. Morey
> Assistant Professor
> Psychometrics and Statistics
> Rijksuniversiteit Groningen / University of Groningen
> R-help at r-project.org mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
More information about the R-help