Re: [R] Error Object Not Found
Hello, Please quote context. The message you get means that package foreign is installed on your computer, you need to load it in the R session: library(foreign) Hope this helps, Rui Barradas Em 09-06-2013 23:07, Court escreveu: Hi, I think that they are loaded. Here is the response that I get: package ‘foreign’ successfully unpacked and MD5 sums checked -- View this message in context: http://r.789695.n4.nabble.com/Error-Object-Not-Found-tp4669041p4669100.html Sent from the R help mailing list archive at Nabble.com. __ 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. __ 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.
Re: [R] Error Object Not Found
On 08.06.2013 21:35, Court wrote: Hello, I am having difficulty with a command. An error message pops up saying: Error: object 'RWGJ.wload' not found. I have installed the packages needed to run the analysis, and have saved them to my working directory. And have you actually loaded them? Uwe Ligges -- View this message in context: http://r.789695.n4.nabble.com/Error-Object-Not-Found-tp4669041.html Sent from the R help mailing list archive at Nabble.com. __ 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. __ 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.
Re: [R] Error Object Not Found
Hi, I think that they are loaded. Here is the response that I get: package ‘foreign’ successfully unpacked and MD5 sums checked -- View this message in context: http://r.789695.n4.nabble.com/Error-Object-Not-Found-tp4669041p4669100.html Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] ERROR: Object not found
Error originates in the customized function ode. When IN!=0, You did
not assign a value to dIN which is required in list(c(dP1,dP2,dIN)).
On 2010-9-21 2:30, Tianchan Niu wrote:
Dear All,
I am trying to use ode solver rk4 to solve an ODE system, however, it
keeps saying: Error in eval(expr, envir, enclos) : object dIN not found.
The sample codes are enclosed as follows, please help me. Thank you very
much!
rm(list=ls())
library(odesolve)
# The ODE system
ode- function(t,x,p){
with(as.list(c(x,p)),{
if(IN==0){
dIN- 1
switch- c
}
else {
switch- 0
}
dP1- a+b*P1-switch*P1
dP2- a-b*P1+switch*P2
list(c(dP1,dP2,dIN))
})
}
# Parameters
a- 0.1
b- 0.2
c- 0.5
parms- c(a=a,b=b,c=c)
# Initial conditions
P10- 100.0
P20- 0.0
IN0- 0.0
xstart- c(P1=P10,P2=P20,IN=IN0)
# Time points
times- seq(0,10,by=1)
out- as.data.frame(rk4(xstart,times,ode,parms))
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
