MATLAB: Choose automatic use of colour in plot

bluecolorplotred

hey guys, I have a problem with the plot instruction. Usually, when I type
    figure
    hold on
    plot(x_1,y_1)
    plot(x_2,y_2)
I will get a plot with two lines in different colors. I don't know what happend but it's not running with my Matlab version scince a few weeks. I'm using Matlab R2014a. When I type this code I get a plot with two lines and both lines are blue. I know that I can choose the colour in the plot enviroment with
    plot(x_1,y_1,'r')
but I want that the color's chosen automatically.
Is there anyone who has an idea what I can do?

Best Answer

This is a difference that came in from R2014b onwards. The R2014a and earlier equivalent is
hold all
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