[R] how to use by() and hist()
dwhite at ling.ohio-state.edu
Sun May 6 17:26:30 CEST 2001
I'm using R 1.2.2 on Sun Solaris.
I have data frame with 4 levels of factor "type". See the example data
type token variance
20 ku n031ku10.10msmeanc 77199422
21 ku n031ku11.10msmeanc 55682249
22 ku n031ku12.10msmeanc 52003965
23 ti n031ti01.10msmeanc 54511040
24 ti n031ti02.10msmeanc 58940197
25 ti n031ti03.10msmeanc 46918442
I'd like to plot histograms by token type as listed in column 1 above.
by(allvariances[,3], allvariances[,1], hist)
this worked well, but provided histograms with different numbers of bins
for each token type.
I also tried
by(allvariances[,3], allvariances[,1], hist(breaks=4))
to specify the number of bins. Hist then complained that I had not
specified a value for the data to be plotted.
Can anyone offer any pointers?
A related question: I'd like to see subsets of the data based on the
levels of factor "type". So in the example above, I'd like see, say, all
observations of type "tu". Any pointers on how to do that?
S. David White
sdavidwhite at bigfoot.com
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