[R] can not produce graph using "splom"

[Xiaoqi Cui]

Hi,

I wrote a function basically to first read an input data file, then open an pdf file and draw graph using "splom". When testing, I ran the function line by line, it can produce nice plot, but with like 50 warnings. However, whenever I ran this function as a whole, it can not produce any plot, the pdf file has nothing in it. It seems the "splom" function even hasn't been run. Does anybody encountered similar problems, and would kindly share any possible reasons? 

Thanks,

Xiaoqi