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 Creating a Colormap Scatter Plot		  New Topic  Reply to Topic
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Seb136

6 Posts
Posted - 09/18/2018 :  07:48:43 AM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): 2017 b9.4.0.220
Operating System:Win10

Hi all,

I have a problem creating a scatter plot with a colormap.



Worksheet wks = Project.ActiveLayer();

DataRange dr;
	
//Creating XYY Range
dr.Add("X", wks, 0, 2, -1, 2);
dr.Add("Y", wks, 0, 4, -1, 4);
dr.Add("Y", wks, 0, 6, -1, 6);
	
GraphPage gp;
gp.Create("Origin");
GraphLayer gl = gp.Layers();
	
gl.AddPlot(dr, IDM_PLOT_INDEX_COLOR); //ID: 247 for Color mapped


This code is my attempt to create a graph that has column 3 as X, column 5 as Y and column 7 as the reference for the color scale.
Instead it just creates a graphpage with columns 5 and 7 as a group and no plot type is selected (so it's just a blank page with axes).

The LabTalk commands I used in this code work as I want them to, execpt that it creates a line plot so I have to use the update_plot_type X-Function.

Worksheet wks = Project.ActiveLayer();
	
wks.Columns(2).SetType(OKDATAOBJ_DESIGNATION_X);
	
LT_execute("wks.ColSel(3,1)");
LT_execute("wks.ColSel(5,1)");
LT_execute("wks.ColSel(7,1)");
LT_execute("Worksheet -p 247");

//use x-function to change plot type to scatter
GraphLayer gl = Project.ActiveLayer();
DataPlot dp = gl.DataPlots(0);
update_plot_type(dp, IDM_PLOT_SCATTER);


Can someone tell me why my OC-code doesn't work as it's supposed to but instead creates a grouped plot?

Thanks a lot
Seb

yuki_wu

896 Posts
Posted - 09/19/2018 :  01:34:22 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Seb,

It seems that IDM_PLOT_INDEX_COLOR only works in LabTalk, but you could try method DataPlot::SetModifier
https://www.originlab.com/doc/OriginC/ref/DataPlot-SetModifier
void test_plot_scatter_3()
{
	Worksheet wks = Project.ActiveLayer();
	DataRange dr;	
	//Creating XYY Range
	dr.Add(wks, 0, "X");
	dr.Add(wks, 1, "Y");
	GraphPage gp;
	gp.Create("Origin");
	GraphLayer gl = gp.Layers();	
	gl.AddPlot(dr, IDM_PLOT_SCATTER);
    DataPlot dp = gl.DataPlots(0); 
	if( !dp )
		return;
	Column col(wks, 2);
	dp.SetModifier(COLDESIG_COLOR, col);
	gl.Rescale();
}

Hope it helps.

Regards,
Yuki

OriginLab
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Seb136

6 Posts
Posted - 09/19/2018 :  03:26:26 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Yuki,

thank you very much it works perfectly fine!
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