Dear all,
I searched the mail archives and the R site and found no guidance
(tried merge, cbind and terms like coalesce with no success).
There surely is a way to coalesce (like in SQL) columns in a
dataframe, right? For example, I would like to go from a dataframe
with two columns to
Not tested, but for data.frame 'df', try
df$coal - ifelse(!is.na(df$Name.x), df$Name.x, df$Name.y)
But see the help page for 'ifelse' regarding issues with classes, and
the myriad R-help posts on the 'ifelse' function.
Erik
Ivan Alves wrote:
Dear all,
I searched the mail archives and the
On 10/22/2008 11:21 AM, Ivan Alves wrote:
Dear all,
I searched the mail archives and the R site and found no guidance
(tried merge, cbind and terms like coalesce with no success).
There surely is a way to coalesce (like in SQL) columns in a
dataframe, right? For example, I would like to
Dear all,
Thanks for all the replies.
I get something with Duncan's code (slightly more compact than the
other two), but of class integer, whereas the two inputs are class
factor. Clearly the name information is lost. I did not see
anything on this in the help page for ifelse.
On this
On 10/22/2008 12:09 PM, Ivan Alves wrote:
Dear all,
Thanks for all the replies.
I get something with Duncan's code (slightly more compact than the
other two), but of class integer, whereas the two inputs are class
factor. Clearly the name information is lost. I did not see
anything on
You could do something like this:
Name.x=c('nx1','nx2',NA,NA)
Name.y=c('ny1','NA','ny3',NA)
Name=Name.x
Name[is.na(Name.x)]=Name.y[is.na(Name.x)]
Name
[1] nx1 nx2 ny3 NA
Julian
Ivan Alves wrote:
Dear all,
I searched the mail archives and the R site and found no guidance (tried
Many thanks to all for their help. Factors are indeed very tricky and
sided on the conversion to character.
Kind regards,
Ivan
On 22 Oct 2008, at 19:01, Duncan Murdoch wrote:
On 10/22/2008 12:09 PM, Ivan Alves wrote:
Dear all,
Thanks for all the replies.
I get something with Duncan's code
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