can someone tell what is happening in here are we assigning values to an array or what?

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hufsa hashmi 2019-9-29

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关闭： MATLAB Answer Bot 2021-8-20

out1(nx,:,1)=[nx x1(i,1,1) y(i,1,1)];

nx=nx+1;

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Answer 1

Thiago Henrique Gomes Lobato 2019-9-29

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In this case you are assigning a row vector to a row in matrix out1. One way to visualize this is using a very simple example:

First create a matrix and check the output

out1 = zeros(3,3,2);
x1 = ones(3,3,2);
y = ones(3,3,2)*2;
out1
out1(:,:,1) =
     0     0     0
     0     0     0
     0     0     0
out1(:,:,2) =
     0     0     0
     0     0     0
     0     0     0

Then do the assignment and check again the result:

nx = 3;
i = 1;
out1(nx,:,1)=[nx  x1(i,1,1) y(i,1,1)]; %[3 1 2]
out1
out1(:,:,1) =
     0     0     0
     0     0     0
     3     1     2
out1(:,:,2) =
     0     0     0
     0     0     0
     0     0     0
     