On Mon, 06-Jan-2014 at 07:38PM +, William Dunlap wrote:
| You could compare the outputs of
| z1 - with(dd, dd$EVYEAR==2012 dd$EVMONTH=='02')
Wouldn't with(dd, EVYEAR==2012 EVMONTH=='02')
be sufficient when using with()?
| (which is like subset()) and that of
| z2 -
Wouldn't with(dd, EVYEAR==2012 EVMONTH=='02')
be sufficient when using with()?
It probably would be sufficient to get the right answer, but I
thought the OP was wondering why there was a difference.
Comparing the results of his original code with new code
would help uncover the reason.
Bill
On Jan 6, 2014, at 11:16 AM, Walter Anderson wrote:
On 01/06/2014 11:14 AM, Sarah Goslee wrote:
Hi Walter,
I can't reproduce your results. Please provide some data that
demonstrates the problem.
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
I have a data frame that I am extracting some records from and noticed
the following issue
I originally used tmp - subset(dd, dd$EVYEAR==2012 dd$EVMONTH=='02')
and noticed that I wasn't ending up with all of the records I should
have; however, when I used
tmp - dd[dd$EVYEAR==2012
Hi Walter,
I can't reproduce your results. Please provide some data that
demonstrates the problem.
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
subset() and [ differ in their handling of NA values, and you don't
need the dd$ in the arguments to subset().
On 01/06/2014 11:14 AM, Sarah Goslee wrote:
Hi Walter,
I can't reproduce your results. Please provide some data that
demonstrates the problem.
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
subset() and [ differ in their handling of NA values, and you
You could compare the outputs of
z1 - with(dd, dd$EVYEAR==2012 dd$EVMONTH=='02')
(which is like subset()) and that of
z2 - dd$EVYEAR==2012 dd$EVMONTH=='02'
(evaluated from within the same context) with
table(z1, z2, exclude=NULL)
That may show something useful.
Bill Dunlap
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