Thanks so much for the reply. I did the search for "rJava examples" and found the Scott Hoover instructions which seemed like exactly what I needed. I compiled the java code and copied myExchange.java and myExchange.class to the directory where I started R where I did and the calls suggested inside worked. But there are no parameters passed in the examples. I need to do something like this: dateStg <- "201310221439591234" dateStg doubleLin <- .jcall(CalqsLin, "D", "linTimOfCalqsStgIsLev",dateStg,-4) or doubleLin <- .jcall(CalqsLin, "D", "linTimOfCalqsStgIsLev","201310221439591234",-4) where the latter two parameters are passed to linTimOfCalqsStgIsLev. Neither way works and I cannot understand the .jcall() instructions in rJava.pdf well enough. I'll keep trying, but would like help.
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