Two for loops that reads all num in x rows and y columns

Question

binarization! im trying to write a code that converts nums that are <= threshold. and returns the value if its great its 1 if its less its a zero!! ** can someone help me please**

Answer 1

explain way more!
-exemples
-attemps
-better/more tags
-more deeply
...

Answer 2

How are your data structured?