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ss12.4
2010 Feb 03
1
What are Type II or III contrast? (contrast() in contrast package)
?contrast in the contrast package gives me the following description.
However, I have no idea what Type II and III contrasts are. Could
somebody explain it to me? And what does 'type' mean here?
*?type?*: set ?type="average"? to average the individual contrasts
(e.g., to obtain a Type II or III contrast)