Physics 381C: FD Methods and Numerical Algorithms for Time Dependent PDEs

• Lectures 1 and 2 (Apr 8, 10)
  • 1-d Wave Equation solved using O(h^2) FD techniques
    • wave1d.f:  Main program.
    • util.f:  Utility routines, including routine to output time series of 1-d profiles for subsequent plotting with splot (parametric surface plot) in gnuplot.
    • Makefile
    • PS surface plot generated from level 8 output with Courant number = 0.5. (Choose Landscape from Orientation menu if using ghostview.)
    • PS surface plot generated from level 8 output with Courant number = 1.00025 (marginally unstable).
    • Sample output (standard output) from level 4 run; this is the form that gnuplot requires for data which is to be displayed as a surface plot. The three columns of data are t, x and f(t,x) respectively. Empty lines separate succesive "rows" of data. See  help splot  and  help splot datafile  in  gnuplot  for more information.
    • Sample  gnuplot input file for producing parametric surface plots.