How do i read a string with a for loop.

I need to read a string with a for loop and evaluate it s characters by threes.

say i have some string input = aaaaabaacaadaae....

i need to cut this into 3 piece sections, then run them through a switch statement.

switch (string)

case(aaa) x=1 case(aab)=2

and so on, then terminate when i got to the end of the string?

i have the switch statement already i just need to figure out how to evalute the string witha for loop.

Answer 1

[Iman Ansari]

Hi

input = 'aaaaabaacaadaae';
n=1;
for i=1:3:size(input,2)
    New{n}=input(i:min(i+2,size(input,2)));
    n=n+1;
end

[Josh]

could you explain exactly what your steps here are? i understand everything except

New{n}=input(i:min(i+2,size(input,2)));

[Iman Ansari]

input(i:i+2) is true, but if your input isn't multiple 3 this gave index error. and New is a cell array.

[Josh]

do you know how to do this without using an array? i havent learned those as of yet?

[Iman Ansari]

With array it's easier to index it's contents:

New{3}
New{5}

But without cell array number of your variables increase:

x1=input(1:3)
x2=input(4:6)
x3=input(7:9)