lookfor (MATLAB Functions)

Search for specified 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 Finding and Replacing Content Within Files.

See Also

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

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