strfind

Find substring within a string in Stateflow chart

Since R2021b

Syntax

k = strfind(str,substr)

Description

k = strfind(str,substr) searches the string str for occurrences of the substring substr. The operator returns a vector that contains the starting index of each occurrence of substr in str. The search is case-sensitive.

Note

The strfind operator is not supported in Stateflow^® charts that use C as the action language.

Examples

Find Start of Substring

Return a value of 8, the starting character position of the substring "world" in the string "Hello, world!".

str = "Hello, world!";
substr = "world";
x = strfind(str,substr);

Input Arguments

str — Input string

string scalar

Input string, specified as a string scalar. Enclose literal strings with double quotes.

Example: "Hello"

substr — Substring

string scalar

Substring, specified as a string scalar. Enclose literal strings with double quotes.

Example: "Hello"

Output Arguments

k — Starting character position of substring

vector of doubles

Starting character position of each occurrence of subStr in str, returned as a vector of doubles that contains the starting index of each occurrence of substr in str. If strfind does not find subStr, then k is an empty array.

Limitations

• This operator does not support the use of Stateflow structure fields or messages. For more information about structures in Stateflow, see Access Bus Signals.

Version History

Introduced in R2021b