How can I convert 100 X Y and Z coordinates generated randomly in the form of a 100x100x100 matrix

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Tamoor Shafique 2020-10-30

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https://ww2.mathworks.cn/matlabcentral/answers/631334-how-can-i-convert-100-x-y-and-z-coordinates-generated-randomly-in-the-form-of-a-100x100x100-matrix

评论： Matt J 2020-10-30

close all
clear all
n = 100;
xm = 100;
ym = 100;
zm = 100;
x = 0;
y = 0;
z = 0;
for i=1:1:n
    S(i).xd=rand(1,1)*xm;
    XR(i)=S(i).xd;
    S(i).yd=rand(1,1)*ym;
    YR(i)=S(i).yd;
    S(i).zd=rand(1,1)*zm;
    ZR(i)=S(i).zd;
end

this gives me 100 random x, y and z-axis. I can plot the points but how can i group them as a 3D matrix of 100x100x100 such that matrix entries are (XR(i), YR(i), ZR(i))

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Tamoor Shafique 2020-10-30

XR(i), YR(i), and ZR(i) are 100 random coordinates each. for 100 iterations of i. so each iteration gives a 3d point.
yes the 100 points should on the 100 should be 1 that would do.

Matt J 2020-10-30

yes the 100 points should on the 100 should be 1 that would do.

But that is what I gave you below.

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采纳的回答

Matt J 2020-10-30

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/631334-how-can-i-convert-100-x-y-and-z-coordinates-generated-randomly-in-the-form-of-a-100x100x100-matrix#answer_529164

在 MATLAB Online 中打开

If you mean you want a 100x100x100 binary array A with one hundred randomly located entries where A(i,jk)=1, then

A=false(100,100,100);
A( randperm(numel(A),100) )=1;
whos A
  Name        Size                   Bytes  Class      Attributes

  A         100x100x100            1000000  logical              
nnz(A)
ans = 100