I am using plplot5.9.5 on Linux . I am not able to vary the window size for tk when I run the x31c.c example. I am trying to do this by changing the xleng1 and xleng2 variables and recompiling. The X window works fine. It is just tk that is the problem. I am always getting a very large window with the same width as the screen. Anyone has any suggestions?
I can't really help you with the tk driver, but could you please ask the question on the plplot-general mailing list (https://sourceforge.net/mailarchive/forum.php?forum_name=plplot-general) since there are people who may be able to help you (and they don't read this forum).