MATLAB: How to identify each digit of a number

digiteach digitidentify

Is there some way to identify each digit of a number? example: number 1001, digit one=1, digit two=0,digit three=0, digit four=1. i appreciate the help thanks

Best Answer

Try this trick:

number = 1001
digits = num2str(number) - '0'

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MATLAB: How to search for substrings in a string

You can specify that you want exactly 4 digits after '_K'

my_strings = '1583_pwer_exp_Exxxx_aqxxx_tqx_K2_vxxx_K1001_'
tmp = regexp(my_strings,'(?<=_K)\d{4}', 'match','once');

MATLAB: Explanation of num2str(x) – ‘0’

It works because num2str convert the number into a char array. For example

x = 10001100;
y = num2str(x)
ans =
  '10001100'

In computer memory, each character is stored on the basis of its ASCII value. From ASCII table character '1' = 49 (decimal) and '0' = 48 (decimal). Therefore in computer memory y is saved as

y = [49    48    48    48    49    49    48    48]

now when you subtracted '0' = 48 decimal, what you are doing is

[49    48    48    48    49    49    48    48] - 48

which gives you

[1     0     0     0     1     1     0     0]

Best Answer

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MATLAB: How to search for substrings in a string

MATLAB: Explanation of num2str(x) – ‘0’

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