Author 
Comment/Response 
Bill Simpson

03/23/13 4:22pm
In Response To 'Re: Re: Re: Re: Re: Re: Basic Function Plotting'  You wrote "What is the role of {Y,1,2.55} in plot for q?"
Plots have to depend on some simple independent variable. That independent variable takes values across the range and those values determine the plot.
If I understand correctly, always an uncertainty, in one plot you have x versus Y and in the other plot you have x versus q.
I think I understand that Y is really your independent variable and both x and q depend on the value of Y. (and on the value of Rho)
So the role of {Y,1,2.55} is that Y is your independent variable and by trial and error I guessed that taking values of Y between 1 and 2.55 were sufficient to calculate all the needed points for Y, x and q to create the six curves you wanted.
Does that make sense?
If you take values for Y too far outside that range then your integral blows up and you get all kinds of errors, warning messages and changes in your plot that I don't think you want.
Are we getting close to what you need?
If we are close then you can always keep a copy of the last working version while you make one tiny change at a time and see if you can get closer to the final result that you want.
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