MATLAB Central Newsreader - Exclude line from plot ledgend

Exclude line from plot ledgend

Sebastian Gatzka — Mon, 19 Jan 2009 20:07:02 -0500

Hello World.

I have added a line object to my plot, which is displayed in the legend now.
I have read, that I can suppress the output inside the legend, but havent found a way of doing it by now.
What is the right syntax for it?

Thanks in advance. S.

Re: Exclude line from plot ledgend

Sadik — Tue, 20 Jan 2009 00:15:05 -0500

"Sebastian Gatzka" <sebastian.gatzka.NOSPAM@stud.tu-darmstadt.de> wrote in message <gl2mh5$fkt$1@fred.mathworks.com>...
> Hello World.
>
> I have added a line object to my plot, which is displayed in the legend now.
> I have read, that I can suppress the output inside the legend, but havent found a way of doing it by now.
> What is the right syntax for it?
>
> Thanks in advance. S.

Hello Sebastian,

To do that, you need the handle to the legend.

So, let us say you have 4 such lines plotted on top of each other, and you say:

legendHandle = legend('line1','line2','line3','line4');

then, you would like to suppress line4. What you should do is

legend(legendHandle,'line1','line2','line3')

Hope this helps.

Re: Exclude line from plot ledgend

Sebastian Gatzka — Tue, 20 Jan 2009 18:06:01 -0500

Thats it!
Thank you!

Re: Exclude line from plot ledgend

Pekka Kumpulainen — Wed, 21 Jan 2009 08:31:02 -0500

"Sebastian Gatzka" <sebastian.gatzka.NOSPAM@stud.tu-darmstadt.de> wrote in message <gl53q9$ir5$1@fred.mathworks.com>...
> Thats it!
> Thank you!

That works if you want to drop the last one. It will only change the labels but keeps the linestyles and colors of the first 3 lines.
You can use the line handles to control which you want in the legend.
Say you have an array hl containing the line handles (hl = plot(mydata))
then legend(hl([1 3 4]),'Line1','Line3','Line4') will use the right lines in the legend.
If you need to tweak then a lot it might be easier to set the DisplayName property of the line objects and you don't need to type the texts in each call to legend.