ex1.c: Demonstrates opening and drawing in a window
ex2.c: Demonstrates use of color map
ex3.c: Plots a simple line graph
ex4.c: Demonstrates use of PetscDrawZoom()
ex6.c: Demonstrates named colormaps
ex7.c: Demonstrates drawing primitives in a window
ex9.c: Makes a simple histogram
ex10.c: Tests repeatedly setting a window type
ex11.c: Demonstrates use of color map
ex12.c: Makes a simple bar graph
makefile