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A
awibroe1-Visitor
1-Visitor
September 1, 2017
Question

3D Plots and Volume

  • September 1, 2017
  • 9 replies
  • 5549 views

Hello to all,

 

I am starting to explore the world of 3D plots in MathCAD. 

 

I am relatively comfortable with 2D xy plots and creating graphs and evaluating them etc by using xy data and applying a polynomial function to extrapolate a curve from said plots. I am also comfortable with evaluating the area under the curve produced in this way with various integrals. 

 

I am not looking at how challenging it may be to add the 3rd dimension i.e. if I have a variety of xyz data plots, how hard is it to plot them into a 3D plot and to bound a volume within them? Further how challenging is it to evaluate the volume within i.e. to find the centroid of the volume etc?

 

Thanks,

 

Andy.

 

 

9 replies

V
ValeryOchkov24-Ruby IV
24-Ruby IV
September 1, 2017

See please one example with Mathcad Calculation Cerver here

http://twt.mpei.ac.ru/MCS/Worksheets/Regress-z-x-y.xmcd

We have data as point on the syrface an needet value as cross-hair on the 3D plot

If it is what you need I can send the sheet!

 

V
ValeryOchkov24-Ruby IV
24-Ruby IV
September 1, 2017

But better is the using not a surface but a set of curves

http://twt.mpei.ac.ru/MCS/Worksheets/Interp-f-x-y.xmcd

A
awibroe1-VisitorAuthor
1-Visitor
September 1, 2017

Hi Valery,

 

Impressive! I think what I am after is being able to plot a variety of scatter points where I have a series of x, y and z data similar to your website. 

 

I am then looking to see how I can 'connect' these to make a surface around these points and then to evaluate the space within the surface. Does that make sense?

 

I have been experimenting with simple shapes i.e. a cube. Where I have 8 points of a cube defined by their respective x,y,z points. When I try to plot these I only seem to be able to add z axis data not x or y data?

 

Andy.

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