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29.65
2012 Feb 17
1
time series manipulation what functions are "best"
Newbie question - mechanical engineer trying to learn R
I've had success with plotting time series data and even made a heat map
using R Graphs Cookbook by Mittal.
I have a new problem - I need to align a number of time series data
"columns" to the desired regular exact time stamp vector. The target time
vector could be finer or more course than the typical time stamp spacing
found.
2012 Feb 17
6
convert zoo object to "standard" R object so I can plot and output to csv file
Another newbie question
I got the 1 minute spine interpolation and 15 mean aggregation working with
many thanks to Gabor Grothendieck using Zoo functions. I got a tip from
Hasan Diwan to look at xts but it seemed I would make better progress using
code from Gabor.
Now I'm having trouble plotting this zoo object. I'm thinking I want a
function to "split" the zoo object back to
2014 Jun 15
1
reading time series csv file with read.zoo issues, then align time stamps
Goal: get time series data interpolated on to desired time stamps.
I have two or more data sets that have time stamps that vary from 5 mins to
3-5 hours.
I want to get all the data put on common time stamps e.g. "00:05:00"
intervals.
I asked Gabor and got some very good code ( zoo aggregate, na.spline,
na.approx) but I'm having trouble getting the csv file read in and converted
to a