Writing a user-defined function.

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Jesus Flores
Jesus Flores 2021-4-21
回答： DGM 2021-4-21
Can some one please help me with this. I don't know where to start. Write a user-defined function named topBottomDifference that takes a single input, a matrix, and returns a vector of the difference between the first row of the matrix and the last row of the matrix.
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David Fletcher
David Fletcher 2021-4-21
The best place to start might be to invest a few hours in Matlab Onramp. It will cover everything you need to know to complete your task.
https://uk.mathworks.com/learn/tutorials/matlab-onramp.html

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回答（1 个）

DGM
DGM 2021-4-21
Well,
row1=mymatrix(1,:);
is the first row of a matrix, and
row2=mymatrix(end,:);
is the last row.
And you can write a function like so:
https://www.mathworks.com/help/matlab/ref/function.html
There's also more info in the Topic section at the end of that page.

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