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how to see the script of build-in function?

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Hi all~
I put "edit sum" in the command line. And I only saw the notes about it (begin with %). How can I see the script of this function?

Accepted Answer

Walter Roberson
Walter Roberson on 14 Apr 2014
There is no "script" for it. sum() is coded in lower level code, such as C or Fortran, and is accessed from MATLAB in binary form. You cannot use a "decompiler" to "reverse engineer" the code without violating your license agreement.
To get access to the source that Mathworks uses for sum(), you need to get a job or internship at Mathworks.
  1 Comment
Yuji Zhang
Yuji Zhang on 14 Apr 2014
I see Walter. Thanks a lot!
I'll check some script of other functions to find out the things I want to see.

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