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statsblock
2007 Nov 20
1
plotting confidence intervals of regression line
Hello,
I am trying to generate a confidence interval (90 or 95%) of a regression
line. This is primarily just for illustration on a scatter plot (i.e. I am
trying to make this
http://www.ast.cam.ac.uk/~rgm/scratch/statsbook/graphics/anima4.gif).
I have been trying to use the predict.lm function, with interval set as
"confidence", but this still seems to be giving me a prediction interval (as
below). It is giving the interval based on the x value of a given point, as
opposed to the confidence interval of th...