Dear friends,
I have discovered what I find peculiar behavior of print. In
general, print with n digits agrees with round with n digits.
Although printing all the elements of a vector with digits=2 gives
the expected results, printing a single element of the vector does
not.
x <- seq(.194,.994,.1)
x
[1] 0.194 0.294 0.394 0.494 0.594 0.694 0.794 0.894 0.994
print(x,2) #this makes sense
[1] 0.19 0.29 0.39 0.49 0.59 0.69 0.79 0.89 0.99
for(i in 1:9) print(x[i],2) #but this does not
[1] 0.19
[1] 0.29
[1] 0.39
[1] 0.49
[1] 0.59
[1] 0.7
[1] 0.8
[1] 0.9
[1] 1
# But this is not a problem with round .
for(i in 1:9) print(round(x[i],2))
[1] 0.19
[1] 0.29
[1] 0.39
[1] 0.49
[1] 0.59
[1] 0.69
[1] 0.79
[1] 0.89
[1] 0.99
sessionInfo()
R version 2.8.1 Patched (2008-12-31 r47414)
i386-apple-darwin8.11.1
locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] psych_1.0-64
loaded via a namespace (and not attached):
[1] tools_2.8.1
Bill
--
William Revelle http://personality-project.org/revelle.html
Professor http://personality-project.org/personality.html
Department of Psychology http://www.wcas.northwestern.edu/psych/
Northwestern University http://www.northwestern.edu/
Use R for psychology http://personality-project.org/r
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