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## Plotting error help: "this value must be a real number"  3-Visitor

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

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... 1 ACCEPTED SOLUTION

Accepted Solutions  21-Topaz I
(To:ecihan)

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. Eo is a constant so it is easy to plot its graph against C1 5 REPLIES 5  24-Ruby III
(To:ecihan)

E(C):=...

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

and plot the graph  E(C) as function C  21-Topaz I
(To:ecihan)

Hi,   3-Visitor
(To:terryhendicott)

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?   21-Topaz I
(To:ecihan)

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. Eo is a constant so it is easy to plot its graph against C1   19-Tanzanite
(To:ecihan)

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). 