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Converting from String to Numeric

The functions listed in this table provide a number of ways to convert character strings to numeric data.

(e.g., uint8)
Convert a character to an integer code that represents that character.
'Hi' 72 105
Convert a character type to a numeric type.
'72 105' [72 105]
Similar to str2num, but offers better performance and works with cell arrays of strings.
{'72' '105'} [72 105]
Convert a numeric type to a character type of specified precision, returning a string that MATLAB can evaluate.
'A' '-1.4917e-154'
Convert a character type of hexadecimal base to a positive integer.
'A' 10
Convert a positive integer to a character type of binary base.
'1010' 10
Convert a positive integer to a character type of any base from 2 through 36.
'12' 10
(if base == 8)

Converting from a Character Equivalent

Character arrays store each character as a 16-bit numeric value. Use one of the integer conversion functions (e.g., uint8) or the double function to convert strings to their numeric values, and char to revert to character representation:

Converting from a Numeric String

Use str2num to convert a character array to the numeric value represented by that string:

The str2double function converts a cell array of strings to the double-precision values represented by the strings:

Converting from a Specific Radix

To convert from a character representation of a nondecimal number to the value of that number, use one of these functions: hex2num, hex2dec, bin2dec, or base2dec.

The hex2num and hex2dec functions both take hexadecimal (base 16) inputs, but hex2num returns the IEEE double-precision floating-point number it represents while hex2dec converts to a decimal integer.

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