Scilab Function

grep - find matches of a string in a vector of strings

### Calling Sequence

  `row=grep(str1,str2)`
  `[row,which]=grep(str1,str2)`

### Parameters

- `str1` : a vector of strings.
- `str2` : a character string or character string vector . The string(s) to search in `str1`
- `row` : vector of indices: row where a match has been found or an empty matrix if no match found.
- `which` : vector of indices: index of str2 string found or an empty matrix if no match found.

### Description

Foreach entry of `str1`, `grep` searches if at least a string in `str2` matches a substring. `str1` entries index where at least a match has been found are returned in the `row` argument. while optionnal `which` argument gives the index of first string of `str2` found.

### Examples

    txt=['find matches of a string in a vector of strings'
         'search position of a character string in an other string'
         'Compare Strings'];

    grep(txt,'strings')
    grep(txt,['strings' 'Strings'])

    [r,w]=grep(txt,['strings' 'Strings'])

### See Also

`strindex`