Drawing a Vertical Plane In MathCad 14

[DavidFinkleman]

Try it. Make x and y vectors of arbitrary dimension (10 is enough) and make Z equal to a constant. Then in a 3D plot try plotting (x,y,z), (z,x,y), and (y,x,z) and see what happens. Evidently a plane has to have some slight tilt in order to be displayed as a surface plot. If you try to plot a point (like 1,1,1), you get three points or a line connecting the three points or three parallel bars. I am out of options to just draw a plane parallel to the vertical axis.

[RichardJ]

Yes, the interpolation algorithms cannot interpolate points when they lie in a vertical plane. If you want to plot a plane plot it as a parametric function. Define these functions: pxy(x,y):vector(x,y,0) pyz(y,z):vector(0,y,z) pxz(x,z):vector(x,0,z) where "vector(a,b,c)" means a column vector with the elements a, b, c. Then plot pxy,pyz,pxz. Richard