cell array into char

hi i have to create a function that allows me to create a char array containing a column of tot number, and then substitute all numbers containing 7 or that can be divided by 7 with the word 'boom'.

i have to use for loop,if else and mod.

function cellarrayN = ex8_1boom(N)

n=1:N

n=mod(n,7)

n=n(:)

celln=num2str(n)

for j=1:N

if celln(celln==0)

i dont know how to go on

[Jan]

The question is not clear yet. A "char array" is a bad idea, mayve you mean a vector of strings or a cell string? What is "tot number"? Where are numbers coming from? Please post the original text of the question to reduce ambiguities.

Answer 1

[Jan]

As fas as I understand, you should create a cell array. Then do this:

cellarrayN = cell(1, N);

Maybe this cell should contain the numbers from 1 to N:

for k = 1:N
    cellarrayN{k} = k;
end

Then instead of k the cell should contain the char vector 'boom', if the number is divisable by 7 or contains a 7:

s = sprintf('%g', k);
if any(s == '7') || rem(k, 7) == 0
    ...
end