extract substring

substr extracts a substring of length len from the string str, starting at the specified offset.

Description

substr extracts a substring of length len from the string str, starting at the specified offset. In this version, the first character position has offset 1. (In Acklam's original code, the first character position has offset 0, but this is inconsistent with Matlab conventions). If offset is negative, the position is reckoned by counting backwards from the end of the string. If len is omitted, substr returns everything to the end of the string. If len is negative, substr removes -len characters from the end of the string.

• MATLAB release: MATLAB 7.7 (R2008b)

[Zhiqiang Zhang]

simple but nice code

[Jennifer Galt]

Why can't this person bother using a standard help format, that includes an H1 line?

No matter, this is a trivial index operation.