From: Frederick Grim <fgrim@no...>  20030327 15:24:34

Howdy, I am trying to make a 3d plot and having troubles. I have read through the online documentation and chunks of the plplot code base. Here is my trouble. I have some code that solves the heat eq. via forward euler and returns the array u[X][T] , 0 < x < pi , and 0 < t < 10.0. Of course this values for u are between 0 and 1. I plotted the matrix in gnuplot and got the correct normaly lookin' graph so the solution looks correct. The number of x sample points is J and the number of t sample points is N. I use the code (probably incorrect to plot) plsdev("xwin"); plinit(); plenv(0.0, 12.0, 0.0, 10.0, 0, 0); // Viewport is entire subpage // Set window characteristics plw3d(2.0, 4.0, 3.0, 3.5, 3.5, 10.0, 10.0, 2.0, 2.0, 45.0, 30.0); plot3d(xc, tc, u, J, N, 3, 0); sleep(10); plend(); And the plot that comes up is a big mess of lines. Interestingly if I recompile and add the configure switch withdouble this refuses to plot at all with the errors *** PLPLOT ERROR *** plenv: Invalid xmin and xmax arguments, aborting operation *** PLPLOT ERROR *** plw3d: Please set up 2d window first, aborting operation *** PLPLOT ERROR *** plot3dc: Please set up window first, aborting operation I have used 5.1.0, 5.2.0, and cvs with similar results. The environment is: OS: Linux LIBC: glibc 2.3.1 What sections of the documentation should I read? What am I doing wrong Thanks, Fred  #!/usr/bin/perl sp0777i<X+d*lMLa^*lN%0]dsXx++lMlN/dsM0<j]dsj $/=unpack('H*',$_);$_=`echo 16dio\U$k"SK$/SM$n\EsN0p[lN*1 lK[d2%Sa2/d0$^Ixp"dc`;s/\W//g;$_=pack('H*',/((..)*)$/) 