A problem based on Matrix Division

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Jalashwa
Jalashwa 2015-5-17
回答： charu sharma 2015-8-20
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 2015-5-17
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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回答（2 个）

Walter Roberson
Walter Roberson 2015-5-17
Logical indexing.
charu sharma
charu sharma 2015-8-20
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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