get value from stem graphic

Question

let us suppose that we have following graph of singular value distribution

which was given by following command

stem(SV)

SV_singular values,from visually of course we can find approximate values of singular values,but is there any possibility to get values from graph itself?of course someone may say that if we have SV,we can directly access,but i want just graphicl tool to get it from picture itself,for example like this

b=stem(SV);

but when i type b,i am getting following number

b

b =

  174.0051

it is matlab self learning,so please help me to learn how to find values from graphics in matlab

Answer 1

The value stored in your variable b is a handle to the current axes. You can access the properties of this axes using get. To access the values in the plot, you can use

b=stem(SV);
values = get(b, 'ydata');