function varargout = data_plot_scatter_3d(data, idx_fea, confidences)
SYNOPSIS
function varargout = data_plot_scatter_3d2(data, idx_fea, confidences, flags_min)
DESCRIPTION
function varargout = data_plot_scatter_3d(data, idx_fea, confidences)
Inputs:
data: data structure
idx_fea: what features to use. Numbers correpond to columns in data.X
Outputs:
[data]
[data, handles]
handles: handles for the legends