lookfor (MATLAB Functions)

Search for keyword in all help entries

Syntax

```
lookfor topic
lookfor topic -all
```

Description

lookfor topic searches for the string topic in the first comment line (the H1 line) of the help text in all M-files found on the MATLAB search path. For all files in which a match occurs, lookfor displays the H1 line.

lookfor topic -all searches the entire first comment block of an M-file looking for topic.

Examples

For example

```
lookfor inverse
```

finds at least a dozen matches, including H1 lines containing "inverse hyperbolic cosine," "two-dimensional inverse FFT," and "pseudoinverse." Contrast this with

```
which inverse 
```

```
what inverse
```

These functions run more quickly, but probably fail to find anything because MATLAB does not have a function inverse.

In summary, what lists the functions in a given directory, which finds the directory containing a given function or file, and lookfor finds all functions in all directories that might have something to do with a given keyword.

Even more extensive than the lookfor function is the find feature in the Current Directory browser. It looks for all occurrences of a specified word in all the M-files in the current directory. For instructions, see the topic Finding Files and Content Within Files in the MATLAB Desktop Tools and Development Environment documentation.

See Also

dir, doc, filebrowser, findstr, help, helpdesk, helpwin, regexp, what, which, who

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