String to number conversion.

  X = STR2NUM(S)  converts the string S, which should be an

  ASCII character representation of a numeric value, to MATLAB's

  numeric representation.  The string may contain digits, a decimal

  point, a leading + or - sign, an 'e' preceeding a power of 10 scale

  factor, and an 'i' for a complex unit.

  If the string S does not represent a valid number, STR2NUM(S)

  returns the empty matrix.



  See also NUM2STR12I1P6X, HEX2NUM1Z7XNDS.