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Francesco84

Italy
21 Posts

Posted - 05/13/2019 :  12:00:09 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. 2019b
Operating System: Windows 10

Good evening,
I would like to ask a question.

I have a worksheet with 100 columns; the odd ones are X, while the even ones are Y.

I have to do a graph with all the functions, which are therefore 50.

I use this method:
for (int i=1; i<=50; i++)
{
plotxy iy:=[Book1]1!(col($((i*2)-1)),col($(i*2))) plot:=200 ogl:=[Graph1]1!
}

What is the best way to assign a different color to each chart?

Thank you
Francesco

yuki_wu

896 Posts

Posted - 05/13/2019 :  10:42:06 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Francesco,

After plot the data as you mentioned, we can group all the plots to set different color automaticall:
layer -g 1 50;

If you have already set the plot designation as XYXYXY… in worksheet, we can plot all columns in that worksheet directly and the plots will be set in different colors:
plotxy iy:=(?,1:end) plot:=200;

Regards,
Yuki
OriginLab
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Francesco84

Italy
21 Posts

Posted - 05/14/2019 :  08:29:10 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Yuky,
Thanks for the reply.

The problem is that with the method you told me only 12 colors are generated for the curves, then they start again from the first one.

Isn't there a way to add more colors?

Thank you,
Francesco
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yuki_wu

896 Posts

Posted - 05/14/2019 :  11:24:45 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Francesco,

To set more colors for the plots, you need to use the command below:

set DatasetName -c value;

so that you could set color by RGB value or HTML value, which have more choices.
https://www.originlab.com/doc/LabTalk/ref/Options_for_DataPlots#-c

Regards,
Yuki
OriginLab
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Francesco84

Italy
21 Posts

Posted - 05/24/2019 :  03:45:00 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks Yuki,

following your advice, I defined an array of colors to use for the plots.

StringArray Colors;
Colors.Add("color(255,0,0)");
Colors.Add("color(0,255,0)");
.
.
.

for (int i=1; i<=50; i++)
{
plotxy iy:=[Book1]1!(col($((i*2)-1)),col($(i*2))) plot:=200 ogl:=[Graph1]1!;

layer1.plot = i;

set %C -c %(Colors.GetAt(i)$);
}

Regards,
Francesco
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