str2double

Convert string to double precision value

Syntax

X = str2double(str)

Description

X = str2double(str) converts the text in string str to a double-precision value.

str contains text that represents a number. Text that represents a number can contain:

• Digits

• A decimal point

• A leading + or - sign

• An e preceding a power of 10 scale factor

If str2double cannot convert text to a number, then it returns a NaN value.

Note

The operator str2double is supported only in Stateflow^® charts that use C as the action language.

Examples

String Containing Decimal Notation

Return a value of -12.345.

X = srt2double("-12.345");

String Containing Exponential Notation

Return a value of 123400.

X = srt2double("1.234e5");

Tips

Enclose literal strings with single or double quotes.