Speeding up the Code !!

my program has 3 for loops for the calculations, it takes about 20 Seconds for Calculations and after these calculations it plots the resulted Matrix in about 10 seconds, does there is any methods to increase the Performance of the code, i am using MATLAB 2010a

[Thorsten]

Maybe, please provide more details.

[Doug Hull]

run the profiler, and show the code.

[Ahmed]

it is 2000 line !!