Iris coloring histogram hold on

Hi,

How can I perform such task concering iris dataset?

Now plot histograms of all variables coloring them by species. Use hold on to overlay plots for different datasets on one figure. Which variables separate species well?

Thanks

[Cris LaPierre]

What have you tried?

[Zuzanna]

Well, Yeasterday I had my first lecture in Matlab so Im really a begginner and I have no idea how to type sth. For another example " make a combined version of the plots using the function gplotmatrix" I've used this: gplotmatrix(meas,[],species) and I received a histogram. But concerning the question and this command hold I have no idea how to do this

[Cris LaPierre]

Walter gives a simple example below. If you want a quick introduction to plotting in MATLAB, consider going through Ch 9 of MATLAB Onramp. It doesn't cover histograms specifically, but does show you how to call plotting functions, including adding multiple plots to the same axes. It should take about 10-15 mins to complete.

If you find that helpful, you might consider going through some of the other chapters as well. Is a nice, free way to learn the fundamentals of MATLAB.

[Zuzanna]

Thank you! I will do that :)

Answer 1

[Walter Roberson]

x1 = rand(1,100);
x2 = rand(1,100).^2 + 0.1;
x3 = exp(rand(1,100));
histogram(x1);
hold on
histogram(x2);
histogram(x3);
hold off
legend({'x1', 'x2', 'x3'})

[Zuzanna]

Thanks!