MATLAB Function Reference

str2double

Convert string to double-precision value

Syntax

• x = str2double('str')
  X = str2double(C)
  

Description

X = str2double('str') converts the string str, which should be an ASCII character representation of a real or complex scalar value, to the MATLAB double-precision representation. The string may contain digits, a comma (thousands separator), a decimal point, a leading + or - sign, an e preceeding a power of 10 scale factor, and an i for a complex unit.

If str does not represent a valid scalar value, str2double returns NaN.

X = str2double(C) converts the strings in the cell array of strings C to double-precision. The matrix X returned will be the same size as C.

Examples

Here are some valid str2double conversions.

• str2double('123.45e7')
  str2double('123 + 45i')
  str2double('3.14159')
  str2double('2.7i - 3.14')
  str2double({'2.71' '3.1415'})
  str2double('1,200.34')
  

See Also

char, hex2num, num2str, str2num

stopasync

str2func