A problem based on Matrix Division

Write a function called divisible that takes a matrix A of positive integers and a single positive integer k as its two inputs and returns a matrix B that has the same size as A. The elements of B are all divisible by k. If an element of A is divisible by k, then the corresponding element in B must have the same value. If an element of A is not divisible by k, then the corresponding element of B must be the product of the given element of A and k. You are not allowed to use any for-­‐loops or while-­‐loops. For example, the call

X = divisible([1 2 ; 3 4], 2)

would make X equal to [2 2 ; 6 4].

[Geoff Hayes]

Jalashwa - rather than posting your homework assignment/problem verbatim, why not describe what you have tried so far or what you don't understand that is preventing you from moving forward?

[Jan]

See http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers

Answer 1

[Walter Roberson]

Logical indexing.

Answer 2

[charu sharma]

There is no need of any loop, logical indexing can be used and it can be done in one line. Refer this with explanation: http://farzicoders.blogspot.in/2015/08/write-function-called-divvy-that-takes.html