Size doesn't match Value?

I'm reading in a .mat variable, a column of numbers, which is appearing in my workspace as a "20,229 x 1 double"

I'd like to now create a for loop which loops x times (where x = 20,229), but when I go to find the size of the variable,

it shows as 25, not 20,229?

How do I properly extract this value for use? It is a column vector. Numel() or size() don't seem to work

[Guilherme]

Hi, Theodore!

Can you please share a extract of your code so that someone could try to figure out why it's not working?

Ideally you're trying to do something like this, right?

x = zeros(20000,1);

for i = 1:20000

% do your stuf

your_value = i;

x(i) = your_value;

end

numel(x) %% length(x) should prompt the same result. Size will have two informations: number of lines and number of columns.

[Theodore]

Yes, apologies for blurring the variables (company confidentiality). 'Blue' and 'Purple' are equal length columns, each being read from a .mat file to have a size of '25'

Answer 1

[DGM]

You're finding the size of the char vector, not the variable.

myvariable = rand(100,1);
size(myvariable) % this is a 100x1 numeric vector

ans = 1×2

100 1

size('myvariable') % this is a 1x10 char vector

ans = 1×2

1 10