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5 results for “from:jwg20”

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Calculating First Occurance by a factor

jwg20 · Apr 1, 2009 · r-help

Thanks! That did it. I should have seen that I needed the comma! hadley wrote: > >> I tried messing with the line df$FixTime[which.min(df$FixInx)] changing >> it >> to df[which.min(df$FixInx)] or adding new lines with...

re shape package - use one cast() instead of many

jwg20 · May 5, 2009 · r-help

I have a data set that I'm trying to melt and cast in a specific way using the reshape package. (I'll use the ff_d dataset from reshape so I don't have to post a toy data...

Calculating First Occurance by a factor

jwg20 · Mar 30, 2009 · r-help

I'm having difficulty finding a solution to my problem that without using a for loop. For the amount of data I (will) have, the for loop will probably be too slow. I tried searching around before posting and couldn...

Calculating First Occurance by a factor

jwg20 · Apr 1, 2009 · r-help

I have another question regarding ddply. In my actual data.frame, I have many other column variables corresponding to the type of the trial. I'm wondering if I can have ddply include those in firstfixtime as well. I tried...

re shape package - use one cast() instead of many

jwg20 · May 5, 2009 · r-help

Thanks for your help! I wasn't sure what the margins variable did, but I'm beginning to understand. I'm almost there, but with my data (and with ff_d) I tried to margin over two variable names, however...

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