Cloud charts can take a matrix of values, with the X-variable in column-1, the Y-variable in column-2 and as many Z-values as required in columns 3-n. It may be more convenient to specify the z-data as simple vectors and set the x,y-variables as properties:

ch.Set 'xvar' farm
ch.Set 'yvar' variety
ch.Cloud yield

This makes it very easy to experiment with different permutations of x and y data to try to visualise the relationships in a multi-dimensional dataset.

There is a simple cover function vs in the RainPro workspace to allow expressions like: ch.Scatter yield vs farm variety – you can experiment with the infamous barley data here!

See also ...
Versus – scatter versus this