Get a three column matrix from meshgrid data

Question

Sk Zeeshan Ali 2020-1-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501085-get-a-three-column-matrix-from-meshgrid-data

回答： Star Strider 2020-1-20

采纳的回答： Star Strider

I have the following program:

x=linspace(0.1,0.3,3);

y=linspace(1,3,3);

[x1,y1] = meshgrid(x,y);

z=x1.*y1;

Now I want to rearrange the data to get a three column matrix C like this

0.1 1 z1

0.1 2 z2

0.1 3 z3

0.2 1 z4

0.2 2 z5

0.2 3 z6

0.3 1 z7

0.3 2 z8

0.3 3 z9

where z1 to z9 are the corresponding values. So, how to obtain the above matrix?

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Answer 1

Star Strider 2020-1-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501085-get-a-three-column-matrix-from-meshgrid-data#answer_411035

Add one line:

x=linspace(0.1,0.3,3);
y=linspace(1,3,3);
[x1,y1] = meshgrid(x,y);
z=x1.*y1;
C = [x1(:), y1(:), z(:)] 

to produce:

C =
          0.1            1          0.1
          0.1            2          0.2
          0.1            3          0.3
          0.2            1          0.2
          0.2            2          0.4
          0.2            3          0.6
          0.3            1          0.3
          0.3            2          0.6
          0.3            3          0.9