Problem 42856. Block average

Created by Peng Liu

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Given a matrix, calculate the block average of each disjoint sub-matrix of the same size. Assume that the size of the matrix along each dimension is an integer multiple of the size of the sub-matrix along the same dimension.

Input: matrix A and the size of each sub-matrix subsz
Output: B = blkavg(A,subsz)

Example:

    A = [2  0  1  3  5  7];
    subsz = [1  2];
    B = [1  2  6];

Hint: this is related to Problem 42854. Crunch that matrix!.

Next problem: Problem 42858. Block average ignoring NaN values

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Solution Stats

Last solution submitted on May 16, 2019

Last 200 Solutions

Problem Comments

1 Comment

1 Comment

James on 24 May 2016

It's related to that problem in another way. I'm getting a similar error to Zikobrelli did: "Error using VisibleTest1 (line 4)"

Solution Comments

Solution 894741

2 Comments

2 Comments

Peng Liu on 24 May 2016

To fix the "Error using VisibleTest1 (line 4)", could you change your first line as "function b = blkavg(A,subsz)"?

James on 25 May 2016

*facepalm* Thank you. I feel like quite the idiot right now for not noticing that error.