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...htgray", + panel.first=grid(nx=NA, ny=NULL)) Error in abline(h = at, col = col, lty = lty, lwd = lwd) : plot.new has not been called yet > dev.off() null device 1 How can I get the grid behind the boxplot? Thank you, Toby Popenfoose Donnelley Manufacturing Supervisor tpopenfoose at earthlink.net

...and I get the following error message: updating HTML package descriptions Warning message: error -1 in extracting from zip file > Is there another way to install this S-Plus based Package? Is there another control chart library for R that I should be trying instead? Thank you, toby popenfoose tpopenfoose at earthlink.net

blake holton wrote >I've been familiarizing myself with the features of R over the past few >days. I'm impressed with the quality and quantity of the features and >packages. One feature that I would be interested in would be a package for >statistical quality control. Does a package for statistical quality control >exist that I've been unable to locate? > >If