Re: [R] How to run own R functions in JRI
So I copy and pasted my function to the R startup file. However, in my function, I change directories. When I run the function in Eclipse, I get a message in the console, Cannot change working directory. Why is this? -- View this message in context: http://r.789695.n4.nabble.com/How-to-run-own-R-functions-in-JRI-tp2965288p2966910.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] How to run own R functions in JRI
I guess the best answer to your question depends on the specifics of the
implementation, but, i think if I were in your situation and I wanted to be
able to call a function foo found in file foo.R every time a user
clicked a button, i'd just
source(path to foo.R)
which just parses the contents of the file as if they were included in the
script. So, foo.R could be sourced from any of your other scripts.
Just make sure to rm(list = loaded files) so that you dont try to read the
same function twice, or you could wrap your source() call in something like
if (!grepl(FOO,ls())) { source(path too foo.R) }
which will only load if the function isn't already loaded.
I guess that could be cause problems if you don't know absolute directory
structure, but ?source() may help you figure out if you can use relative
paths..
if not, off the top of my head you might be able to discover the path using
file.path()
I guess if your program installs files to directories in some predictable
way, this won't be a problem.
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Re: [R] How to run own R functions in JRI
Nevermind about the previous post. However, I in the retest sample code, I can run my own function in the command line. But, say I am creating a GUI and I want the user to enter the model parameters. How do I, within the java code, explicity call my unique function without going to the console? -- View this message in context: http://r.789695.n4.nabble.com/How-to-run-own-R-functions-in-JRI-tp2965288p2967038.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] How to run own R functions in JRI
So if I have the R function foo and I have my main method in Java how would I
call the method foo? What would be the syntax?: Do I create an REengine
first?
public static void main(String[] args)
{
}
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[R] How to run own R functions in JRI
Suppose I have implemented my own R function. How do I call this function in Eclipse using JRI? -- View this message in context: http://r.789695.n4.nabble.com/How-to-run-own-R-functions-in-JRI-tp2965288p2965288.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] How to run own R functions in JRI
I think the basic answer here is package it, which I did a couple of times
but found inconvenient if I was going to change the function fairly often,
i've taken a different tact, just including custom functions when R starts,
i wrote a function that runs when I start the R session, loading the
functions in a given directory
Gedit's R plugin handles the Rprofile.conf for me, so thats how I made it
automatically load, you could just edit that file and change the value of
.start{ }
# jcress, fall 2010
# load all of the scripts in a directory (called path)
# also, define a new function which parses the content in ls()
# so we can clean the session without removing the functions loaded
path - ~/.Rstartfiles
for (nm in list.files(path, pattern = \\.[RrSsQq]$)) {
source(file.path(path, nm))
cat(loading, nm, \n)
}
cleanls - function(objects){
for (func in list.files(/home/jcress/.Rstartfiles)){
objects[(which(objects == eval(removeext(func] - }
objects[which(objects==cleanls)] -
return(c(objects[which(objects != )]))
}
rm(list=cleanls(ls()))
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Re: [R] How to run own R functions in JRI
I am still a little unsure of how I would do this. I do not want to install
GEdit. Is there anyway in the retest in the included example that you can
show me how I would do this? My function is:
lol = function(x,y)
{
sum = x+y
mod = sum %5
return mod
}
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Re: [R] How to run own R functions in JRI
Sure, so, all I was saying about gedit is that it handles the R session for
me, which is a neat feature but not mandatory to get the expected result,
there's an rprofile.site file which describes your (user specific)
preferences,
you can manually edit this file to add functions at start up by defining a
start{} function
that's where I put the code in my example, so you could create a directory
and use a function similar to the one I posted to load everything in that
directory, or just paste functions into your rprofile.site file.
for documentation see
http://biom1.univ-lyon1.fr/library/base/html/Startup.html
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