Best sorting algorithm for large array

Hey! For my homework, I need to find the median of a greyscaled image without using any built-in function. I can sort the matrix using a bubble sorting algorithm. However, this process takes a long time for a 300x300 matrix. I would like to know the best algorithm for something of this dimensions.

I also checked some quicksort codes, but they were a function on itself, and I can't do that because my function does more than just sort and find the median.

If any of you can recommend a good sorting algorithm or can make a quicksort without being in a function, I would highly appreciate

Answer 1

[ahmed nebli]

I suggest you just use the command sort, see this link: https://www.mathworks.com/help/matlab/ref/sort.html

[Gonçalo Ferreira]

I can't use the sort command, i think it counts as a built-in function