Delete a plot in GUI rutine

This is the thing i'm trying to implement a button on a GUI script. The button function is to plot the x,y data over data_1's plot.

data_1 is calculated outside the plot_button callback function

Now the problem is that every time I do click on the plot_button the h2's plot is adding a new plot instead of erase the previous one.

How can i do to erase the previous h2 by just clicking plot_button?

This is an example:

function plot_button_callback()

x=rand(1,100);
y=rand(1,100);
h1=plot(handles.data_1), hold on
h2=plot(x,y)

end

Answer 1

[John]

assuming the graph where you are plotting things is called graph_one then follow the example:

cla(handles.graph_one)

plot(handles.graph_one,x,y)

%cla should clear the graph

[Gabriel González]

Ok. it works. Thanks!

Answer 2

[Honglei Chen]

Use

set(h2,'YData',y)

to replace the line.