[R] How do I use simple calls to java methods?
Hurr
hill0093 at umn.edu
Tue Oct 22 02:31:47 CEST 2013
I need to learn how to set up two methods (java functions) so I can call them
from R.
Currently I just copy and paste R code into the R console.
A little piece of the R code inside a loop is:
linTm <- linTimOfCalStg(dta[i,timCol],tlev)
calCk <- calStgOfLinTim(linTm,tlev)
if(calCk!=dta[i,timCol]) {
print(c(i,dta[i,timCol],linTm,calCk),digits=20)
stop("incorrect time conversion")
}
The two functions called have these first lines:
linTimOfCalStg <- function(calStg,tlev) and
calStgOfLinTim <- function(linTm, tlev)
which in java substitutes are:
public final static double linTimOfCalqsStg(String calStg,int tlev) and
public final static String calqsStgOfLinTim(double linTm,int tlev)
both in a java class called "CalqsLin.class" compiled from "CalqsLin.java".
The R code works.
The purpose of all this is to eliminate duplicate subroutines and
their duplicate checking ln both languages.
There will be several other subroutines that I will also use in both
languages.
I can start by putting everything into a single directory in Windows seven
to learn.
How do I make this substitution?
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