Dear PRSDStudio team,

When displaying more than 2 features with decision boundary using sdscatter it seems that libPRSD is recomputing the decision boundary each time we switch features using the arrows.
But what is this decision boundary exactly? Is it a projection of the high dimension decision function onto the desired 2-dimensional subspace? I do not really understand what is going on.

thanks in advance,
regards,
JM

Dear Jean-Michel,

the scatter plot itself is a projection of all samples onto the two selected features. The decisions, however, are computed in a plane cross-section of the total feature space that goes through the reference sample (square cyan marker). When you select a new reference sample with a mouse click, the decisions on the new plane are computed.

Does it help?

Pavel

Hi Pavel,

I do not fully understand. Why does the decision boundary change each time I select a reference sample?

regards,

JM

Hi Pavel,

Sorry, forget about my question, the answer became clear in mind just when I sent the reply.

cheers,

JM