Index error during encryption

im encrypting a message in an image and im having trouble getting the message to go through the cypher. i get an error at line 8 that says "Index exceeds the number of array elements (22)." and cant figure out how to fix it.

l = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',' '];

n = 1:27;

m = 'this is a test message';

d = 1;

em = zeros(1,length(m));

for i = 1:length(m)

for ele = 1:length(l)

if m(d)==l(ele)

em(d)=n(ele);

d=d+1;

end

end

[Adam]

Tick the 'Pause on errors' option in the run menu then just look at d in the workspace or command window when it stops. Apparently it is > 22.

Answer 1

[Stijn Haenen]

You can use this script:

l = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',' '];
n = 1:27;
m = 'this is a test message';
d = 1;
em = zeros(1,length(m));
for i = 1:length(m)
    em(i)=find(l==m(i));
end