I am using Tcl and plplot to draw large amount of data. The data will be processed in C and I am trying to compile the example codes xtk04.c shows how to work with matrix in Tcl and shared it with C. The problem is that I can't compile xtk04.c. I am using Tcl 8.5 and plplot 5.6.10 on Debian 4. I am using the following command when compiling xtk04.c. "gcc -I/usr/include/tcl -I/usr/include/plplot xtk04.c -ltcl". Does anyone here succeed in get the code running?