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dmaynard1-Visitor
1-Visitor
October 31, 2017
Solved

variable undefined

  • October 31, 2017
  • 2 replies
  • 3913 views

My expfit equation is not plotting. I am getting an "undefined variable" error. When I backtrace the error, my modified expfit equation tells me that "t_e" is undefined and to check label is set correctly. On the plot, the array dimensions do not match. Unsure how to correct these issues. Pages 7 and 8 are the problems. Using mathcad prime 3.1

Best answer by MJG

Three issues that I found:

  1. You used exp^(z), where z = Ee2*te.  This is a function raised to a power.  You should use either exp(z) (function with input), or e^(z) (constaint raised to a power).
  2. You used the Matrix Row operator, but should use the Matrix/Vector Index to call out the constants obtained from expfit.
  3. You omitted the third constant from expfit.

Capture.PNG

2 replies

V
24-Ruby IV
ValeryOchkov24-Ruby IV
24-Ruby IV
October 31, 2017

May be so

Use please  x[1 not x<1>

kk.png

    M
    MJG1-VisitorAnswer
    1-Visitor
    October 31, 2017

    Three issues that I found:

    1. You used exp^(z), where z = Ee2*te.  This is a function raised to a power.  You should use either exp(z) (function with input), or e^(z) (constaint raised to a power).
    2. You used the Matrix Row operator, but should use the Matrix/Vector Index to call out the constants obtained from expfit.
    3. You omitted the third constant from expfit.

    Capture.PNG

    D
    dmaynard1-VisitorAuthor
    1-Visitor
    October 31, 2017

    Thank you for your help. I am trying to teach myself on this program and run into pitfalls occassionally. I appreciate the quick response.

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