Say for a 126 by 18 symbolic matrix, substituting numerical values into the matrix DD1 takes about 10 seconds (using time() );
for a 62 by 16 matrix, take just about 1/5 second.
By when the matrix is about 254 by 20, it take much longer! More than a minute!
I never actually waited how long, but I am wondering if there is something wrong? Am I using the right command?
Say the matrix is DD1 with numpar:=[x=0.3,y=0.2,z=0.98,....]