converting binary to hexadecimal

bin_str = input('Enter binary number: ', 's');

i = length(bin_str);

disp(i);

n = ceil(i/4);

disp(n);

for g = n : -1 : 1

    if i > 4
        hex_str(g) = b2h(bin_str(i-3 : i));
        i = i - 4;
    else
        hex_str(g) = b2h(bin_str(1 : i));
    end
end

function h = b2h(b)

switch b

    case {'0', '00', '000', '0000'}
        h = '0';
    case {'1', '01', '001', '0001'}
        h = '1';
    case {'10', '010', '0010'}
        h = '2';
    case {'11', '011', '0011'}
        h = '3';
    case {'100', '0100'}
        h = '4';
    case {'101', '0101'}
        h = '5';
    case {'110', '0110'}
        h = '6';
    case {'111', '0111'}
        h = '7';
    case '1000'
        h = '8';
    case '1001'
        h = '9';
    case '1010'
        h = 'A';
    case '1011'
        h = 'B';
    case '1100'
        h = 'C';
    case '1101'
        h = 'D';
    case '1110'
        h = 'E';
    case '1111'
        h = 'F';
end

I am trying to take the binary input and convert it into hexadecimal value,but im getting the following error:

??? Error: File: filename.m Line: 19 Column: 1 Function definitions are not permitted in this context

I can't understand this error.. What changes should i need to make in order to get the correct output?

Pls help me! Thank you

Answer 1

[Thorsten]

You have a script and try to define a function in line 19. This is not allowed. You have to either define b2h in a different file or turn your script into a function.

BTW, is there a particular reason why you do not use

dec2base(bin2dec(bin_str), 16)

[Meghashree G]

I have binary matrix(decode1) from column 1 through 8 as 0 1 1 0 0 0 1 1, now i have to convert this into hexa,

bin_hex=dec2base(bin2dec(decode1), 16) i'm using this ,but getting error

??? Error using ==> bin2dec at 27 Input must be a string.

What changes should be made ?

[Thorsten]

You have to convert it do a string using

char(decode1+double('0'))

You can also use dec2hex, as Andrei points out. So you complete code will become

bin_hex = dec2hex(bin2dec(char(decode1+double('0'))));

[Meghashree G]

Thank you so much :) It helped me a lot...:) Thanks much :)

Answer 2

[Andrei Bobrov]

b = {'1100100101111111101';'1100000011001'};
out = dec2hex(bin2dec(b));