**To**:**ferret_users@xxxxxxxx****Subject**:**[ferret_users] Confidence intervals in a linear regression****From**:**"Enrique Sánchez Sánchez" <esanchez@xxxxxxxxxx>**- Date: Sat, 24 Jun 2006 17:04:39 +0200
- Sender: owner-ferret_users@xxxxxxxxxxxxx

Hi: I want to plot a regression line associated to two variables: temperature and pressure, e.g.: I know that the scatter plot is well done with regressionxy, similar to regressionx, obtained from a previous post (http://ferret.pmel.noaa.gov/Ferret/Mail_Archives/fu_2006/msg00403.html) let p=temp let q=slp plot/vs p,q Which also give me some statistics (correl, slope, intercep). I can even plot over the scatter data the linear regression adjustment with plot/vs/line/over p,qhat My question is the following: could it be possible also to plot the confience intervals over the linear line and the points?, let's say 95% confidence ones. Or even the error bars? I don't care if it is only a stright line band, instead the more precise curve from a t-test, but I don't know how to do it, my statistical background is not very high, so I don't know it parameters from regression script allows me to plot confidence intervals lines. Thanks a lot in advance, Enrique Sanchez Depto. Geofisica Meteorologia Universidad Complutense Madrid Madrid (Spain)

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