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From: Le He on 26 Jan 2010 03:12
Hi,

I like to plot two groups of lines in the same plot. Each group has two lines with same color and I have to draw them in the order of one group after another group. I try to show legend for groups only not for lines. How can I do this? Here is a simplification of my wrong code:

plot(x1, y1, color1); hold on;
plot(x2, y2, color1); hold on;

plot(x3, y3, color2); hold on;
plot(x4, y4, color2); hold on;

legend({color1, color2})

Thanks!
From: Husam Aldahiyat on 26 Jan 2010 13:32
Le He <flylehe(a)hotmail.com> wrote in message <1086898179.54627.1264529565883.JavaMail.root(a)gallium.mathforum.org>...
> Hi,
>
> I like to plot two groups of lines in the same plot. Each group has two lines with same color and I have to draw them in the order of one group after another group. I try to show legend for groups only not for lines. How can I do this? Here is a simplification of my wrong code:
>
> plot(x1, y1, color1); hold on;
> plot(x2, y2, color1); hold on;
>
> plot(x3, y3, color2); hold on;
> plot(x4, y4, color2); hold on;
>
> legend({color1, color2})
>
> Thanks!

Try doing this:

> hold on % once it's on, it remains so
> plot(x1, y1, color1);
> plot(x3, y3, color2);

> plot(x2, y2, color1);
> plot(x4, y4, color2);
>
> legend({color1, color2})

Should work like you want.
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