MATLAB Answers

Anoop
0

Plot 3 scale graph

Asked by Anoop
on 27 Nov 2014
Latest activity Commented on by Image Analyst
on 28 Nov 2014
Hi I need help with this code.
Weight=(37000:2000:74000);
CG=(16:1:42);
Index=(((Weight/1000)*(CG-25)*0.041935)+50);
I want to do a scattered plot with Weight on the Y axis, Index on the X axis(Bottom) and CG on X axis (Top). Please help.
Regards Anoop

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2 Answers

Answer by mashtine on 27 Nov 2014

Hi Anoop, you can do this
Weight=(37000:2000:74000);
CG=(16:1:42);
Index=(((Weight/1000)*(CG-25)*0.041935)+50);
figure
h = scatter3(CG,Index,Weight);
First you will need to make sure your Weight and CG are of the same dimensions. One is 1x19 and the other is 1x27 of which you cannot calculate index from. Once you do that, from there you can look at all the scatter3 plot options to change the graph or you can do this interactively with the figure edit tools.

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Anoop
on 27 Nov 2014
HI Masao,
I made it the same dimension
Weight=(22000:2000:74000);
CG=(16:1:42);
Index=(((Weight/1000)*(CG-25)*0.041935)+50);
figure
h=scatter3(CG,Index,Weight);
I am getting this error.
Error using *
Inner matrix dimensions must agree.
Error in Trimsheet (line 3)
Index=(((Weight/1000)*(CG-25)*0.041935)+50);

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Image Analyst
Answer by Image Analyst
on 27 Nov 2014

You need to use meshgrid to get all possible combinations of Weight and CG:
Weight=(37000:2000:74000);
CG=(16:1:42);
[x, y] = meshgrid(Weight, CG);
Index=(((x/1000).*(y-25)*0.041935)+50);
h = scatter3(y(:), Index(:), x(:));

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Image Analyst
on 27 Nov 2014
I don't know if any graph like that is built in. It looks like you'll have to create something very custom.
Anoop
on 28 Nov 2014
Sorry I dint give you the complete details. I am only expecting the grid to be created in Matlab. As you can see the Y axis is Weight and X axis at the bottom is Index and the X axis at the top is CG. Thanks for your time.
Image Analyst
on 28 Nov 2014
I don't really know. Perhaps you can get it by manipulating the camera angle. Or else just create it at a very low level with calls to line().

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