source code

How open the source code of any built_in function

Answer 1

[Walter Roberson]

Odd, someone else asked much the same question a few hours earlier. See my (serious) answer there: http://www.mathworks.com/matlabcentral/answers/25717-function

Answer 2

[C.J. Harris]

Depends on the function. Just type 'edit' before the function name to see if the source is visible to the end user. For example:

edit xlsread

Answer 3

[Image Analyst]

Put the cursor in the function and type control-D. Many built-in functions of toolboxes have a middle layer of m-code that is an actual m-file you can open in the editor. That can tell you a lot about what the function does. However, inside that function's m-file, there may also be a DLL or something that does the real intensive calculations or proprietary operations that you cannot drill down deeper into.