> On Apr 7, 2016, at 3:39 PM, John Sorkin wrote:
>
> I am trying to write a function that can be used to apply to process all the
> columns of a data.frame. If you will run the code below, you will get the
> error message undefined columns selected. I hope someone will be able to
> teach me w
Hi John,
First, apply isn't guaranteed to work on data frames. There are two
easy ways to do something like this, but we had better have a data
frame:
guppy<-data.frame(taste=rnorm(10,5),
crunch=rnorm(10,5),satiety=rnorm(10,5))
If you just want to apply a function to all or a subset of columns o
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