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kentmey
United Kingdom
5 Posts |
 Posted - 04/09/2014 : 1:52:27 PM
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Hi
I have four columns (x,y1,y2,y3). I would like to display the values of the columns y2,y3 as min and max of the error bars of y1.
I cannot do it with the yEr function since it considers that y1 is at the center of the error bar.
Any help on the way would be highly appreciated  
Kentmey
at the beginning was origin |
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lkb0221
China
497 Posts |
Posted - 04/09/2014 : 3:22:33 PM
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Hi,
I don't understand...Where is y1's error come from?
You mean like, y2 = min(abs((mean(y1)-y1))?
Zheng
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greg
USA
1378 Posts |
Posted - 04/10/2014 : 1:59:29 PM
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Perhaps what you mean is that you want different Plus and Minus error values. This can be set after you plot or in Plot Setup.
Assuming you plotted y1 vs x with both y2 and y3 as yEr...
- Double click directly on any error bar.
(This opens Plot Details on the Error Bar tab with one of the yEr datasets selected on the left.)
- Uncheck either Plus or Minus (Depending on which yEr data was selected.)
- Select the other yEr data.
- Uncheck the box you did not uncheck above.
- Click OK
Assuming you haven't plotted...
- With nothing selected, choose Plot : Symbol : Scatter which opens the Plot Setup dialog
- Check the X box in the row of column 1
- Check the Y box in the row of column 2
- RIGHT CLICK ON THE yEr COLUMN HEADER and choose "Y Error Bars Plus/Minus"
- Check the yEr+ box for the row with plus error values
- Check the yEr- box for the row with minus error values
- Click OK (or Add and OK)
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Edited by - greg on 04/11/2014 09:11:50 AM |
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Hideo Fujii
USA
1582 Posts |
Posted - 04/11/2014 : 12:00:16 PM
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Hi Kentmey,
Not sure, but if your y2 and y3 data columns present the min-mx range, the following
procedure should do the job: (See the screenshot of my sample below)
1) Insert two columns before y2.
2) Using Set Column Values tool, put the y1-min and max-y1 in the inserted columns respectively.
3) Designate two columns as YErr.
4) Highlight y1 and following two columns, and make a plot.
5) Double-click the plot to show the Plot Details dialog;
Select the second dataset from the left panel, and set it the error bar direction to "Minus" (in the "Error Bar");
Select the third dataset from the left panel, and set it the error bar direction to "Plus".
Step 5) is the same to the Greg's explanation.
Hope this also helps.
--Hideo Fujii
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error bars with a min and max