obtain element from a non defined array matlab

I am looking to obtain the element of an array without the necessity of creating a new variable.

Currently I am using like:

img_ex = imread('peppers.png');

size_img_temp = size(img_ex)

size_img = size_img_temp(1)

But i would like to call the array element without the necessity of create a new variable.

Something like:

img_ex = imread('peppers.png');

size_img = anything_to(size(img_ex))

Aboiding the

Error: Invalid array indexing.

Thank you very much

[Josep Llobet]

An MATLAB help about indexing is in:

https://es.mathworks.com/help/matlab/math/array-indexing.html

Answer 1

[Voss]

img_ex = imread('peppers.png');

size_img = subsref(size(img_ex),substruct('()',{1}))

size_img = 384

% for comparison:
size_img_temp = size(img_ex);
size_img = size_img_temp(1)

size_img = 384

Of course, with size specifically, you can do:

size_img = size(img_ex,1)

size_img = 384