Greetings,
Q #1
------
How does one combine data frames by row ... no cleverness a la
merge(), just add rows.
For example, given A with 20 rows and B with 30 rows, I want C =
combine( A, B) having 50 rows.
Columns having matching names should be filled from both (all)
sources with suitable coercion, unmatched would get NA in rows whose
source does not have that column.
Q #2
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Given data frame A having various columns including "vx".
I want to create a new data frame A2 that has 10 copies of each row
in A, all the same as the source row except vx=seq(1:10). The source
row value of vx is overwritten. A2 would have 10 times as many rows as A.
I have of course discarded idea of using of a for loop, but maybe
that is what it takes.
TIA etc,
Chip Barnaby
---------------------------------------------------------
Chip Barnaby [EMAIL PROTECTED]
Vice President of Research
Wrightsoft Corp. 781-862-8719 x118 voice
131 Hartwell Ave 781-861-2058 fax
Lexington, MA 02421 www.wrightsoft.com
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