Problem 42798. Moving Product (Easy)

Created by Peng Liu

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Given an input array A, write a function movprod(A,k,dim) to calculate the moving product over a sliding window of length k along the specified dimension dim of input array A. If dim is omitted, operate along the first non-singleton dimension of A.Example 1:<pre> &gt;&gt; A = [1 2 3 4 5 6];
 &gt;&gt; B = movprod(A,3)
 B = 
 6 24 60 120</pre>Example 2:<pre> &gt;&gt; A = [1 4 3 6 2
 2 5 1 2 3
 3 6 2 3 5];
 &gt;&gt; B = movprod(A,3,2)
 B = 
 12 72 36
 10 10 6
 36 36 30</pre>You may assume that dim &lt;= 3, and the input array A is a non-empty array with size(A,dim) &gt;= k.Related problems: <a href = "http://www.mathworks.com/matlabcentral/cody/problems/429-function-on-a-moving-window">Problem 429</a>; <a href = "http://www.mathworks.com/matlabcentral/cody/problems/246-project-euler-problem-8-find-largest-product-in-a-large-string-of-numbers">Problem 246</a>A kind note (05/15/2017): This problem was created in 2016, one year before R2017a's introduction of the built-in movprod. To avoid function name clash, we've changed the user-defined function name into moveprod in the test-suite, which gives you the opportunity to solve the problem by directly calling the built-in movprod!

Given an input array A, write a function *movprod(A,k,dim)* to calculate the moving product over a sliding window of length *k* along the specified dimension *dim* of input array *A*. If dim is omitted, operate along the first non-singleton dimension of A.

Example 1:

>> A = [1 2 3 4 5 6];
    >> B = movprod(A,3)
    B = 
       6   24   60   120

Example 2:

>> A = [1     4     3    6    2
            2     5     1    2    3
            3     6     2    3    5];
    >> B = movprod(A,3,2)
    B = 
        12   72   36
        10   10    6
        36   36   30

You may assume that dim <= 3, and the input array A is a non-empty array with size(A,dim) >= k.

Related problems: <http://www.mathworks.com/matlabcentral/cody/problems/429-function-on-a-moving-window Problem 429>; <http://www.mathworks.com/matlabcentral/cody/problems/246-project-euler-problem-8-find-largest-product-in-a-large-string-of-numbers Problem 246>

*A kind note* (05/15/2017): This problem was created in 2016, one year before R2017a's introduction of the built-in movprod. To avoid function name clash, we've changed the user-defined function name into *moveprod* in the test-suite, which gives you the opportunity to solve the problem by directly calling the built-in movprod!

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Problem 42798. Moving Product (Easy)

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