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C++ API

: x = str2num (s)

: [x, state] = str2num (s)

Convert the string (or character array) s to a number (or an array).

Examples:

str2num ("3.141596")
      ⇒ 3.141596

str2num (["1, 2, 3"; "4, 5, 6"])
      ⇒ 1  2  3
         4  5  6

The optional second output, state, is logically true when the conversion is successful. If the conversion fails the numeric output, x, is empty and state is false.

Caution: As str2num uses the eval function to do the conversion, str2num will execute any code contained in the string s. Use str2double for a safer and faster conversion.

For cell array of strings use str2double.

See also: str2double, eval.

Package: octave