# Is it possible to plot a 3D graph with non numerical values?

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Navya Mohan on 29 Oct 2019
Answered: Navya Mohan on 30 Oct 2019
I have a set of values for plotting like
z= {66%,77,78,79,79}
y= {25%,44,67,34,55}
x= { Class1, Class2, Class3, Class4,Class5}
How to plot a 3d graph with with non numeric values like x(along any one axis) in 3D graph? plz help !

Bjorn Gustavsson on 29 Oct 2019
The simplest method might be to map your classes to some integer range and then use the standard plotting functions. In your case you could try:
z = [66,77,78,79,79]; % use cell2mat to do this for larger arrays
y = [25,44,67,34,55];
x = {Class1, Class2, Class3, Class4,Class5}
X = [1,2,3,4,5]
xstr = unique({'Class1', 'Class2', 'Class3', 'Class4','Class5'});
scatter3(X,y,z,32,X,'filled')
set(gca,'xtick',X,'xticklabel',xstr)
HTH

Walter Roberson on 29 Oct 2019
Edited: Walter Roberson on 29 Oct 2019
z = [66,77,78,79,79];
y = [25,44,67,34,55];
x = categorical({'Class1', 'Class2', 'Class3', 'Class4', 'Class5'});
pointsize = 32;
scatter3(x, y, z, pointsize, x); %color by category

#### 1 Comment

Bjorn Gustavsson on 29 Oct 2019
For my old version of matlab, it was not allowed to create a categorical array, but the same result could be achieved with:
x = ordinal({'Class1', 'Class2', 'Class3', 'Class4', 'Class5'});