hi, how to use strsplit function to split a line of string into multiple lines when a predefined number of characters is reached?

for example: if I have: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", I want to split it into lines after 4 characters and then I could have:"AAAA" "AAAA" "AAAA" "AAAA"

Answer 1

[Star Strider]

This divides them into 8 rather than 4 strings:

str = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
SplitLen = 4;
CheckLen = SplitLen*fix(length(str)/SplitLen);      % So ‘reshape’ Will Work
Result = {reshape(str(1:CheckLen), [], 4)};         % Result As Cell Array

[sahar hemmati]

thanks! it totally works!

[Star Strider]

My pleasure!

[sahar hemmati]

BUT! instead of saying to split into n strings, I want to split into strings of length l, so i don't know how many strings I will have at the end!

[Star Strider]

I forgot to include ‘SplitLen’ as an argument to reshape. The result is unchanged:

str = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA';
SplitLen = 4;                                       % Length Of Strings
CheckLen = SplitLen*fix(length(str)/SplitLen);      % So ‘reshape’ Will Work
Result = {reshape(str(1:CheckLen), [], SplitLen)};  % Result As Cell Array

[sahar hemmati]

still it does not work, because if the length of remainder of string is less than what was defined it will be ignored and i don't want this

[Star Strider]

The string argument to reshape has to be an integer multiple of the desired length of the substrings. The easiest way to deal with the remainder of the string is to append it to the end:

Result = {reshape(str(1:CheckLen), [], SplitLen); str(CheckLen+1:end)};

Answer 2

[dpb]

s=reshape(s,L,[]);

Requires rem(length(S)/L)=0, of course.

[Guillaume]

So the safest thing is to precede the code with:

assert(mod(numel(s), L) == 0, 'String length is not a multiple of the split-length');