CODEWITHSUNDEEP
matlabsearch
Rosa
Rosa

Reputation: 253

how to find a command in MATLAB

I have a problem:

I use lookfor to find a function or a command in MATLAB, but Many times lookfor gives some results but when I use help for learning how to use, I see this statament:

No matches found.

What is the problem, If I use the newer version of MATLAB, this problem is solved or not?

Upvotes: 2

Views: 112

Answers (1)

herohuyongtao
herohuyongtao

Reputation: 50667

This is supposed to happen because these two commands are different!

The lookfor command allows you to search for functions based on a keyword. It searches through the first line of help text, which is known as the H1 line, for each MATLAB function, and returns the H1 lines containing a specified keyword. For example, MATLAB does not have a function named inverse. So the response from

help inverse

is

inverse.m not found.

But

lookfor inverse

finds over a dozen matches. Depending on which toolboxes you have installed, you will find entries like

INVHILB Inverse Hilbert matrix.
ACOSH   Inverse hyperbolic cosine.
ERFINV  Inverse of the error function.
INV     Matrix inverse.
PINV    Pseudoinverse.
IFFT    Inverse discrete Fourier transform.
IFFT2   Two-dimensional inverse discrete Fourier transform.
ICCEPS  Inverse complex cepstrum.
IDCT    Inverse discrete cosine transform.

To learn on, check out http://www.thphys.may.ie/CompPhysics/matlab/help/techdoc/basics/getting6.html.

Upvotes: 4

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