[R] correlation
darteta001 at ikasle.ehu.es
darteta001 at ikasle.ehu.es
Fri Feb 8 17:14:28 CET 2008
Dear list
I would like to compare two measurements of disease severity (M1 and
M2), one of the is continuous (M1 ranging from 1 to 10) and the other
is ordinal (M2 takes Low, Medium, high and very high). Do you think is
ok to use cor() function to test whether the two agree, i.e correlate?
I am afraid that if I set M2 to 1,2,3 and 4, the function cor() will
take them as continuous and therefore lose intrepretation.
Thanks for your commments
David
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