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mmmk6
UK
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 Posted - 11/11/2007 : 07:34:35 AM
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Origin Version (Select Help-->About Origin): 8.0
Operating System: win xp sp2
I am new user of Origin.
I have three set of values for Y. I want to error plot this data. My procedure was:
1. put X and three columns of Y values (named y1, y2 and y3) in columns
2. Insert another Y column (named as Y-average) for average of the three columns of Y values.
3. Inserting another Y column for error (named y-error), which is the difference of the lowest and highest values in the three Y column of y1,y2 and y3.
4. then plot Y-error and Y-average against the X values using error plot.
Please tell me if I am doing it wrong.
Also, how can i check variance of the y-average values?
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Mike Buess
USA
3037 Posts |
Posted - 11/11/2007 : 11:38:32 AM
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Step 3 probably exaggerates the errors. This is how I would do it...
1. A(X), Y1(Y), Y2(Y), Y3(Y).
2. Select columns Y1, Y2 and Y3, then right-click and select Statistics on Rows.
3. Set up the Statistics dialog like this...
>Quantities to Compute: Mean and Standard Deviation
>Output Results to: set Book and Sheet to <source>, Column to <new>
4. Click OK to create columns Mean(Y) and SD(yEr).
5. Select the new columns and plot as Scatter or Y Error.
Mike Buess
Origin WebRing Member |
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Satistics