Which package are you using?
-----Original Message-----
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of Parminder Mankoo
Sent: Tuesday, July 06, 2010 10:50 PM
To: r-help@r-project.org
Subject: [R] numerical derivative R help
Importance: Low
I fit my CDF to sum of exponentials and now I want to take the numerical
derivative of this function to obtain probability density.I will really
appreciate your help reagrding the error messages I am getting which I
don't
understand.
*
*
> fitterma <- function(xtime) {
a <- -0.09144115
b <- -0.01335756
c <- -2.368057
d <- -0.00600052
return(exp(a+b*xtime)+exp(c+d*xtime))
}
> numericDeriv(fitterma,"xtime")
*Error in numericDeriv(fitterma, "xtime") : *
* cannot coerce type 'closure' to vector of type 'double'*
*
*
*Thanks,*
*parmee*
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
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.
DISCLAIMER:\ Sample Disclaimer added in a VBScript.\ ...{{dropped:3}}
______________________________________________
R-help@r-project.org mailing list
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.
