what are built-in functions?
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I wanted to see the code of svd, but when I type edit svd.m I get a description of the code and a comment saying Built-in function. What does this exactly mean? That svd is written directly in C?
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Laura Proctor
2011-4-6
6 个投票
From the doc:
Functions that are frequently used or that can take more time to execute are often implemented as executable files. These functions are called built-ins.
Unlike MATLAB program file functions, you cannot see the source code for built-ins. Although most built-in functions do have a program file associated with them, this file is there mainly to supply the help documentation for the function.
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John D'Errico
2011-4-6
2 个投票
Yes. You can't see that code, as it does not exist in the form of m-code. Only the help is available, but MATLAB knows to use the compiled version. Usually this is to improve the speed.
Andrew Newell
2011-4-6
1 个投票
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