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perceivedlearningcurve
2009 Jul 07
1
cor vs cor.test
...functions are intended to work the same way
- about how these functions handle NA values
- whether cor.test supports 'use = complete.obs'.
Some example output may explain why I am confused:
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WORKS:
> cor(q[[9]], q[[10]])
perceivedlearningcurve
overallimpression 0.7440637
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DOES NOT WORK:
> cor.test(q[[9]], q[[10]])
Error in `[.data.frame`(x, OK) : undefined columns selected
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(I assume that's because of R's generous type...