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How to extract the first row and first column of an array of matrix?

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Mr. NailGuy
Mr. NailGuy 2017-11-16
评论： Mr. NailGuy 2017-11-16
I have an array of 10001 elements of which a 2x2 matrix is inside each element. How can I loop thru the array and extract the first row, first column of each matrix?
Will appreciate your feedback.
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Stephen23
Stephen23 2017-11-16
编辑：Stephen23 2017-11-16
@Mr. NailGuy: your array description is wildly inaccurate. The screenshot clearly shows that your array has size 2x2x10001, which means that it actually has 40004 elements.
You might like to consider revising basic MATLAB terminology, if you want to communicate effectively with regular MATLAB users.
https://www.mathworks.com/help/matlab/math/multidimensional-arrays.html
Mr. NailGuy
Mr. NailGuy 2017-11-16
Yeah, I might have wrong understanding of the terminology but I already resolve it. Thanks

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Birdman
Birdman 2017-11-16
a=randi([1 10],2,2,10001);%a numeric array
row=a(1,:,:);
column=a(:,1,:);
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KL
KL 2017-11-16
Use squeeze,
https://www.mathworks.com/help/matlab/ref/squeeze.html
all_first_elements = squeeze(your_matrix(1,1,:));
now, plot like you normally do,
plot(all_first_elements)

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