Displaying 2 results from an estimated 2 matches for "indexat".
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indexa
2012 Nov 10
2
For loop question
I have this code:
IEF <- to.monthly(IEF, indexAt="endof")
SPY <- to.monthly(SPY, indexAt="endof")
I would like to use a for loop instead of separate entries,
so the only code that needs to be modified is the list
of symbols.
symbols <- c("IEF", "SPY")
for(symbol in symbols) {
symbol <- to.m...
2010 Apr 11
0
converting a ts object to an xts object
...rterly series.
I know that I could use "aggregate", but I am interested in the
to.quarterly conversion, please.
Here is my example:
> str(ibm$ts)
Time-Series [1:144] from 1998 to 2010: 43.7 46.3 46 51.4 52.2 ...
> tsp(ibm$ts)
[1] 1998.000 2009.917 12.000
> to.quarterly(ibm$ts,indexAt='yearqtr')
Error in attr(x, "tsp") <- value :
invalid time series parameters specified
Any suggestions would be much appreciated.
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: e...