XY Plot from 3D Surface

Sy · Post by Sy » Sun May 04, 2008 4:53 am

I really like this feature but in the future would it be possible to have the option to use a polynomial to bisect the 3D surface (of the from y =ax2 + bx +c for example) or better yet to input a series of xy co-ordinates and bisect through these?

Thanks for a great program

Sy

Post by **DPlotAdmin** » Mon May 05, 2008 9:04 am

Possible, but it makes interpretation a bit more difficult. Since there is no longer a linear relationship between X and Y, I'm not sure what values should appear on the new X axis to make it clear what you're looking at.

Sy · Post by Sy » Thu May 29, 2008 5:55 am

Ahhh,

I see what you mean. However could you assume a linear relationship, i.e take the curve and split it into equal intervals and then take the correspoonding value from the surface contour for each interval? You could then plot the surface value on the y axis against 1,2,3,4,5,6 etc on the x-axis.

Post by **DPlotAdmin** » Thu May 29, 2008 12:52 pm

That will work, except there's another piece missing that needs to be added first. Currently the multiple axes feature only allows a linear relationship between the 2 axes (e.g. X2=A+B*X1). I've needed to amend this for a while, along with more axes, etc.

I could do what you want currently by instead of using "Multiple Axes", display Y values at the top of the plot using Text>X,Y Labels. But I think it would be more useful (and much easier to manipulate) if I do it right the first time. This will definitely go on my to-do list, but it might be a while before it gets done. Thanks for your input.