MATLAB (MATrix LABoratory) is a numerical computing environment and a fourth-generation programming language. Use this tag with care.. see excerpt.
MATLAB is a rich tool used by many researchers in the signal and image processing areas and many others.
If your question also references MATLAB code, it is quite advisable that you use this tag.
However, please note that if the question is really about "How to do X in MATLAB" it is likely that the question will get closed.
If you want "to understand an algorithm because your results are not what you theoretically expect", explain the complete problem and reasoning and attach the matlab code; this will be welcome.
