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A problem based on Matrix Division

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Jalashwa
Jalashwa on 17 May 2015
Answered: charu sharma on 20 Aug 2015
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].

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Geoff Hayes
Geoff Hayes on 17 May 2015
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?

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Answers (2)

Walter Roberson
Walter Roberson on 17 May 2015
Logical indexing.

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charu sharma
charu sharma on 20 Aug 2015
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

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