Here considering the plots you require which are 3D heat maps. You are trying to plot a 4d object. consisting of 3 independent variables and 1 dependent variable.
Correct me if I'm wrong.
In that case in heat maps. the 3 independent variables indicate the position of the point and the value of the dependent variable is indicated by the colour
These are some resources on how to plot 3D heat maps
if you have the data as a CSV file then you could use the seaborn or matplotlib python libraries to plot your data. These are some tutorials on the same
Thanks Anoop A Nair. Using Python within Matlab app designer looks easy and doable. That will be a task for my students.
I have got reasonably good results with the 3D plotting using "scatter3". It gets better with more points and smaller sizes of filled circles (in scatter3 options). Thanks for the hint.