How to create a 4D plot.
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Rajkumar Verma
on 26 Apr 2019
Commented: Walter Roberson
on 7 Aug 2020
Hello friends,
I have three variables:
,
,
,
with condition .
. ,
and .
.
How to generate the graph for . ,
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Accepted Answer
Walter Roberson
on 26 Apr 2019
x = 0:.01:1; y = x; z = x;
[X,Y,Z] = meshgrid(x,y,z);
mask = X.^2 + Y.^2 + Z.^2 <= 1;
F = sqrt(1-(X.^2+Y.^2+Z.^2)); %caution, need this order because of round-off
subplot(1,2,1)
scatter3(X(mask),Y(mask),Z(mask),20,F(mask));
subplot(1,2,2);
F2 = F;
F2(~mask) = nan;
for level = 0.2:0.2:0.8
isosurface(X, Y, Z, F2, level);
end
7 Comments
Gustavo Lunardon
on 7 Aug 2020
Hello!
How would you apply the scatter3 command to plot all the grid points if you had no inequality (no mask)?
Is there a more elegalnt solution than just selecting an inequality that would always be satisfied?
Walter Roberson
on 7 Aug 2020
scatter3(X(:), Y(:), Z(:), 20, F(:)); %F will be used for color information
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