I'm doing my project on generalized eikonal formalism to detect interference phenomena instead of using geometrical phenomena. Now, i have selected numerical method such as lepfrog, forward time centered space, forward-time backward space and forward time forward space to detect that optical phenomena. due to the stability problem, implicit technique has been used as well. Now, i face problem in the coding part. the coding must be done in MATLAB software but my supervisor didn't teach much because she also don't have much experience in that software. please help me to give some idea on this coding part.