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1-Visitor
September 14, 2012
Question

MathCAD Prime 2.0 polyfitc() Function

  • September 14, 2012
  • 10 replies
  • 4822 views

Ok all you MathCad experts, I have a really annoying problem. I have a worksheet that performs the following tasks: data is input via a text file into a 3D array, next it curve fits the data, and finally I want to be able to read the coeffecients of the function. The problem occurs when I try to symbolically evaluate the curve fit. I use a the general form of a polynomial to the nth power to display the polynomial, but when I symbolically evaluate it MathCAD returns the very function that was called earlier. This makes sense, but it is not how previous versions worked. Anyone know of a symbolic modifier that would fix the issue? I attached the document with a similar example; the real version is proprietary.

Thanks all!

Jacob

10 replies

19-Tanzanite
September 14, 2012

I would consider that a bug.

1-Visitor
September 14, 2012

Thanks for the input, but I don't like your answer (although you are most likely correct ). Can anyone disprove Mr. Jackson?

1-Visitor
September 15, 2012

May be so?

symbprime.bmp

Viktor

19-Tanzanite
September 16, 2012

Jacob Stockton wrote:

... but it is not how previous versions worked.

What makes you think so? I've just tried M11 and it exhibits the same behaviour (though I had to use genfit, as it doesn't have polyfitc).

Alan