load fisheriris
mean( meas )
std( meas )
boxplot( meas )
hist( meas )
scatter( meas( :, 1 ), meas( :, 2 ) )
group = grp2idx( species );
scatter( meas( :, 1 ), meas( :, 2 ), [], group )
scatter( meas( :, 1 ), meas( :, 2 ), [], group, 'filled' )
scatter3( meas( :, 1 ), meas( :, 2 ), meas( :, 3 ), [], group, 'filled' )
plotmatrix( meas )
measz = zscore( meas );
mean( measz )
std( measz )
boxplot( measz )
imagesc( measz )
