[R] Conditional Loop For Data Frame Columns

[jawbonemurphy]

Hi Dave,

Thanks for your response!

I'm new at R, and I'm afraid I'm not sure what you mean by:

?lapply
?"["
?order

Were these suggestions for other commands to try?  If so, can you be more
specific?  I apologize for being clueless :)

Secondly, you're right that the script I have now leaves me with the means
from the last column.  Do you have any suggestions for how to write the
results for each "i" to a unique vector?  I was going to try:

mean_i <- tapply(x[,i], ID, etc..., but I was thinking that this would just
create a vector named "mean_i" w/ results of last column, not a separate
vector for each "i".  I guess what I want is some command to print the
result of each run before repeating with the next "i".  Any ideas?  Again,
thanks for the help.

Best,
Logan



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