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09-30-2011
03:30 PM

09-30-2011
03:30 PM

3D data, surface plot & 3D plot fit.

I have a table of data x, y, z in excel.

1. What is the best way of importing this data into Mathcad 15 for further analysis?

(So far I used Insert->Component...)

2. How do you plot this data as a Surface Plot?

(Stuck here)

3. How do you produce a function that would characterize this data, similar to a curve fit? So knowing x and y, you can plug them into z=f(x,y) to get desired value. (Ultimately this is what needed. I have multiple data tables like this and need to charactarize them by a function)

Thank you in advance for taking your time to respond.

I searched for related topics here and online but no success so far.

Any help is appreciated.

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10-01-2011
04:02 AM

10-01-2011
04:02 AM

Re: 3D data, surface plot & 3D plot fit.

Vitaliy,

I have described this task in the 4-d chapter "Technical Statistic"of the book "Mathcad for students and engineers".

See for example this picture from the book:

http://twt.mpei.ac.ru/ochkov/Mathcad_12/4_03_3D_Spline.png

and others pictures here

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10-01-2011
07:50 AM

10-01-2011
07:50 AM

Re: 3D data, surface plot & 3D plot fit.

Vitaliy Glotov wrote:

I have a table of data x, y, z in excel.

1. What is the best way of importing this data into Mathcad 15 for further analysis?

(So far I used Insert->Component...)

2. How do you plot this data as a Surface Plot?

(Stuck here)

3. How do you produce a function that would characterize this data, similar to a curve fit? So knowing x and y, you can plug them into z=f(x,y) to get desired value. (Ultimately this is what needed. I have multiple data tables like this and need to charactarize them by a function)

Thank you in advance for taking your time to respond.

I searched for related topics here and online but no success so far.

Any help is appreciated.

1) I prefer data tables; this puts the data into the mathcad sheet.

2) Help is hard to understand. Persist!

5) Multi-dimensional polynomial regression is available in the function "regress."