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ecihan1-Visitor
1-Visitor
October 19, 2017
Solved

Plotting error help: "this value must be a real number"

  • October 19, 2017
  • 3 replies
  • 4395 views

Can anyone help me figure out what I'm doing wrong? I can't seem to get a plot that shows, Eavg on the y-axis and Eavg(C1) on the x-axis...

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Best answer by terryhendicott

Hi,

 

Your graph is only plotting two points 0 and 1.  Prime draws the straight line between these two points.

I have corrected it so it plots 11 points 0,0.1..10.  I have formatted the plot to show these points.  It is now not a straight line but a smoothed line through these points.

Capture.JPG

Eo is a constant so it is easy to plot its graph against C1

Capture2.JPG

 

3 replies

V
ValeryOchkov24-Ruby IV
24-Ruby IV
October 19, 2017

Try please

E(C):=...

C:=1*unit, 1.001*unit..10*unit

and plot the graph  E(C) as function C

 

Or send please the sheet!

    T
    terryhendicott21-Topaz II
    21-Topaz II
    October 19, 2017

    Hi,

    Capture.JPG

     

      E
      ecihan1-VisitorAuthor
      1-Visitor
      October 20, 2017

      Thanks! I've modifed the formula a bit and the plot of Eeff seems to be correct as the volume fraction, C1 increases to 1.  Another question, would it be possible to plot the line of Eeff/Eo as a function of C1?  If so, how would I go about doing it?  I've been trying but no avial...

       

      Edit: is this way of plotting C1 only plotting two points, 0 and 1? or are there numerous points being plotted inbetween 0 to 1?

       

       

      Capture.PNG

      T
      terryhendicott21-Topaz IIAnswer
      21-Topaz II
      October 20, 2017

      Hi,

       

      Your graph is only plotting two points 0 and 1.  Prime draws the straight line between these two points.

      I have corrected it so it plots 11 points 0,0.1..10.  I have formatted the plot to show these points.  It is now not a straight line but a smoothed line through these points.

      Capture.JPG

      Eo is a constant so it is easy to plot its graph against C1

      Capture2.JPG

       

        R
        RichardJ19-Tanzanite
        19-Tanzanite
        October 19, 2017

        Eavg is not a variable, it's a function name. Specifically, it's a function that depends on C1, so you need to plot Eavg(C1) against C1 (as Terry shows).

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