Hi, I've not used R for about one year and don't know well about the updates on the time series-related package.
My primary job is to do economic/financial time series data analysis - annual, monthly, daily, etc. I usually read data by the package "XLConnect", which can read xls or xlsx files directly. It's excellent. However I can't find a package to manipulate time series data. For example, I just want to do an easy manipulation , e.g, to label the dates of the data from , say, 1991M10 to 2014M07, and then extract part of the data, say, 2005M01 to 2010M12 and do analysis. Is there any package work well for my purpose? I sometimes need to aggregate monthly data to quarterly data and I find "aggregate" function helpful. In the past I used packages xts, zoo and don't find it really user friendly. Maybe I haven't mastered it; maybe there're some updates (which I don't know) now. Could someone recommend a package or provide an example (or just the document, I can read it) for my purpose? Attached is an exemplary data set I talked about. Thanks, Miao
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