Displaying 3 results from an estimated 3 matches for "tathta".
2009 Jul 08
3
matching each row
I have two dataframes, the first column of each dataframe is a unique id
number (the rest of the columns are data variables).
I would like to figure out how many times each id number appears in each
dataframe.
So far I can use:
length( match (dataframeA$unique.id[1], dataframeB$unique.id) )
but this only works on each row of dataframe A one-at-a-time.
I would like to do this for all of
2009 Jul 20
1
a complicated merging task
I would like to merge two dataframes, but i have a condition that needs to
used for the merge as well.
the rows (observations) in each dataframe are identified by each person's ID
and by the date of the observation.
Basically I would like it to be merged based on both ID (exact match) and
date (a condition where one dataframe's date must be after the other
dataframe's date).
2009 Jul 09
2
How to Populate List
...56. Re: #INCLUDE (Andy Zhu)
57. Re: Import xlsx file in Ubuntu 9.04 (Duncan Temple Lang)
58. Re: Randomizing a dataframe (Mark Knecht)
59. Re: Reading from Google Docs (William Dunlap)
60. Re: bigglm() results different from glm()+Another question
(Greg Snow)
61. matching each row (tathta)
62. Extracting a column name in loop? (mister_bluesman)
63. Re: Extracting a column name in loop? (Mark Knecht)
64. Re: Reading from Google Docs (Duncan Murdoch)
65. Simple monovariate classification? (rgunton@dijon.inra.fr)
66. Re: Reading from Google Docs (Farrel Buchinsky)
67. Re:...