I'm having troubles with the names of columns.
quantmod deal with stock quotes. I've created an array of the first 5
closing prices from Jan 2007. (Is there a problem that the name is the same
as the variable name? There shouldn't be.)
> close
close
2007-01-03 1416.60
2007-01-04 1418.34
2007-01-05 1409.71
2007-01-08 1412.84
2007-01-09 1412.11
When I try to create a more complex array by adding columns, the names get
fouled up. Here's a simple example.
> cbind(changed.close = close+1, zero = 0, close)
close zero close.1
2007-01-03 1417.60 0 1416.60
2007-01-04 1419.34 0 1418.34
2007-01-05 1410.71 0 1409.71
2007-01-08 1413.84 0 1412.84
2007-01-09 1413.11 0 1412.11
The first column should be called "changed.close", but it's called "close".
The second column has the right name. The third column should be called
"close" but it's called "close.1". Why is that? Am I missing something?
If I change the order of the columns and let close have its original name,
there is still a problem.
> cbind(close, zero = 0, changed.close = close+1)
close zero close.1
2007-01-03 1416.60 0 1417.60
2007-01-04 1418.34 0 1419.34
2007-01-05 1409.71 0 1410.71
2007-01-08 1412.84 0 1413.84
2007-01-09 1412.11 0 1413.11
Now the names on the first two columns are ok, but the third column is still
wrong. Again, why is that? Apparently it's not letting me assign a name to
a column that comes from something that already has a name. Is that the way
it should be?
I don't get that same problem on a simpler example.
> IX <- cbind(I=0, X=(1:3))
> IX
I X
[1,] 0 1
[2,] 0 2
[3,] 0 3
> cbind(Y = 1, Z = IX[, "I"], W = IX[, "X"])
Y Z W
[1,] 1 0 1
[2,] 1 0 2
[3,] 1 0 3
Is this a peculiarity to xts objects?
Thanks.
*-- Russ *
*
*
P.S. Once again I feel frustrated because it's taken me far more time than
it deserves to track down and characterize this problem. I can fix it by
using the names function. But I shouldn't have to do that.
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