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, which 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.

Examples

Return a String That Contains a Decimal Notation

Return a value of -12.345.

X = str2double("-12.345");

Return a String That Contains an Exponential Notation

Return a value of 123400.

X = str2double("1.234e5");

Limitations

• This operator does not support structures. For more information about structures in Stateflow, see Access Bus Signals Through Stateflow Structures.