How to code my own Reshape function without using the built in reshape()??

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Coleman tyson 2020-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/616503-how-to-code-my-own-reshape-function-without-using-the-built-in-reshape

编辑： Matt J 2020-10-16

Im essentially trying to make a function ---> function [matrix] = myReshape(vector, m, n) that takes in a 1d vector and dimensions m and n, and makes it a 2d matrix as shown above with the m and n provided.

How can I go about this?

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James Tursa 2020-10-16

编辑：James Tursa 2020-10-16

Since MATLAB stores values in column order, note that your proposed "reshape" reorders the values in memory. I.e., it does not do the same thing as the MATLAB reshape( ) function. You have the equivalent of a transpose mixed in with this operation.

Coleman tyson 2020-10-16

I see. Though transpose wouldn't necessarily work for me because if I want to end up with an uneven matrix of dimensions 3x4, I couldn't reshape and then transpose the reshaped matrix, because it would result in a 4x3 matrix ://

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Matt J 2020-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/616503-how-to-code-my-own-reshape-function-without-using-the-built-in-reshape#answer_516173

编辑：Matt J 2020-10-16

在 MATLAB Online 中打开

Hint: Notice the effect of doing things like this:

A=nan(3,4);
A(:)=1:12
A = 3×4
     1     4     7    10
     2     5     8    11
     3     6     9    12
●

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Coleman tyson 2020-10-16

lol ok sorry D: so do you recommend using transpose at all??

Matt J 2020-10-16

编辑：Matt J 2020-10-16

I recommend that you work backwards from the solution. What if you took the result that you are trying to get, and transposed that? What would that look like?

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