If you are looking to use parallel coordinates, MATLAB has an implementation in the Statistics Toolbox: PARALLELCOORDS.
Otherwise if you want to implement one yourself, the basic version (without all of the bells and whistles) should be easy to do:
load fisheriris %# load some data
%#meas = zscore(meas); %# to normalize the attributes
h = plot(meas'); %'# plot
set(gca, 'XTick',1:4, 'XTickLabel',{'SL' 'SW' 'PL' 'PW'}, 'XGrid','on')
ylabel('feature value'), title('Parallel Coordinates')
%# color according to class label
c = grp2idx(species);
clr = lines( numel(c) );
arrayfun(@(k) set(h(c==k),'Color',clr(k,:)), unique(c))
