num2str use for a product of two queried variables

With a for loop, num2str works fine querrying a single variable array:

for i = 1:runs
    a = num2str(data.x(i));
end

But when I try to use as I needed, i.e. multiply data.x with data.y:

for i = 1:runs
    a = numstr(data.x.*data.y(i));
end

I get this error:

Error using horzcat

Dimensions of arrays being concatenated are not consistent.

Note: data.x and data.y are both arrays of size 10x1; and the product of the two is only allowed along this "a" line.

Thanks for any tip on this!

[Matt J]

COpy/paste the full errror message and, ideally, post enough code that we can run and reproduce the error.

Answer 1

[Matt J]

Hard to be sure if it's the cause, but in the second version, you have mistyped num2str.

[Kenny]

Oh I see; I mistyped it in here. But it is okay in the original script.