Decimals to Roman Numerals

Hello I'm student currently studying MATLAB and I have a project to turn Decimals to Roman Numerals. I wanted to know if it was possible to make matlab recognize individual digits. eg. 1000 x1=1 x2=0 x3=0 x4=0

as then my code will follow into:

for number > 1000 if x1=1 roman= 'M' if x1= 2 roman='MM'

any help would be greatly appreciated thanks.

Answer 1

[José-Luis]

a = 1000;
a = num2str(a);
a = a - '0';

a is a row vector, where each element is one of your x's

[Michael Kurniawan]

I understand how this works but what if I typed a number such 900 would this put the vector [ 9,0,0 ] and so I have to type 0900 for this method to work.

sorry for forgetting to mention but my code is for 0-3000 Thank you again

[José-Luis]

If you want four digits, you could, for instance:

your_vals = repmat('0',1,4);
a = 900;
a = num2str(a);
your_vals(end-numel(a)+1:end) = a;
your_vals = your_vals - '0';

Answer 2

[Andrei Bobrov]

from Cody

function ans = dec2rom(z)
d = [ 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1];
c =  {'M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I'};
[];
for ii = 1:numel(d)
    if z >= d(ii)    
        ans = [ans,repmat(c{ii},1,fix(z/d(ii)))];
        z = rem(z,d(ii));
    end
end

% eg

>> dec2rom(2012)
ans =
MMXII

[José-Luis]

This was a homework question...

[Daniel Shub]

is []; a cody "trick"? Presumably it initializes ans?

@Jose-Luis, while the given solution scores well on cody, its usefulness as a homework solution is probably limited.

[José-Luis]

Fair enough

[Andrei Bobrov]

Hi Daniel! Yes.

[Michael Kurniawan]

Thank you to all of you for the help, I'm a bit slow in understanding codes so in the future I might ask some very silly questions and I hope you all will still help me and once i again thank you

[José-Luis]

Please accept an answer if it helped you.