| T O P I C R E V I E W |
| prithahait2 |
Posted - 03/15/2016 : 6:33:34 PM
Origin Ver. and Service Release (Select Help-->About Origin): 2016
Operating System:Windows 7
Hi,
The Xbar plot requires a minimum of 2 data points in a subgroup to provide a LCL and UCL. Is there an automatic way to plot individual data points and get the LCL and UCL? I am trying to modify the Xbar and R plot types but am not able to.
Thanks! |
| 3 L A T E S T R E P L I E S (Newest First) |
| Shirley_GZ |
Posted - 03/16/2016 : 11:09:05 PM
Hi,
You can use the Statistic Gadget, http://www.originlab.com/doc/Origin-Help/Gadget-Statistics
In the ROI Box tab, check the Show Standard Deviation Lines check box and set Multiple of SD to 3.
Thanks,
Shirley
Originlab Technical Service Team |
| prithahait2 |
Posted - 03/16/2016 : 12:16:37 PM
Hi Shirley,
I am trying to get the LCL and UCL for the entire set: as in for all individual values in the data set.
It would be calculated as LCL= Xmean - 3*SD, UCL= Xmean +3*SD where Xmean and SD would be for the entire data set.
Bottomline, I want to figure out a way to automatically calculate Xmean, SD, UCL and LCL for all data not just within a sub-group.
Is this something that can be generated using Origin?
Or is there a help line I can call? |
| Shirley_GZ |
Posted - 03/16/2016 : 03:09:45 AM
Hi,
Yes, according to the algorithm, the QC(X bar R) chart requires at least two data points for a subgroup. Can you tell me why you want to plot individual data points and get the LCL and UCL? Because, as I understand it, if there is only one data point in a subgroup, you can’t get the mean and SD of the subgroups.Then how can you get the LCL and UCL?
Thanks,
Shirley
Originlab Technical Service Team |
|
|
