MATLAB: How to creat cell array

Question

how to creat function which will have an input integer n. if n positive it will create and return a cell array with strings of random characters of increasing lengths from 1 to n

for example

functionname(4)
ans=
    'z' 'zf' 'zfk' 'zfke'

and if it negative it will decreasing

many thanks

Answer 1

Your example only includes lower case so this code does as well.

function randLetters = myfunc(integer)
letters = 'a' : 'z';
rnum = randi(length(letters), 1, abs(integer));
randLetters = cell(1, abs(integer)); 
for i = 1:abs(integer)
    randLetters{i} = letters(rnum(1:i));     
end
if integer < 0 
    randLetters = fliplr(randLetters); 
end

Example

myfunc(8)
ans =
  1×8 cell array
    {'r'}    {'rw'}    {'rwf'}    {'rwfh'}    {'rwfht'}    {'rwfhtb'}    {'rwfhtbt'}    {'rwfhtbta'}
    
myfunc(-4)
ans =
  1×4 cell array
    {'whke'}    {'whk'}    {'wh'}    {'w'}