I make a time series: 开发者_如何学编程t = ts(rnorm(12*50), start=1900, freq=12) and then find the maximum with max(t). Is there any convenient way to find out what date this maximum occurred at?T
I am working with a transactions table. I want to generate a number 开发者_开发技巧of variables to determine the number of transactions performed by the same customer in the last 5 and 30 minutes and
I am trying to fit ARIMA model of a seasonally decomposed series. But when I try to execure following:
I\'m working with invoice data in Oracle SQL. I want to create a variable, \"median account invoice amount to date\", that gives the median invoice amount for an acco开发者_开发百科unt up to that give
I am looking for percent rank function in R but can not find it. Actually I am interested in runPercentRank function like the ones in TTR package under runFun (runMin, runMax,...). The function would
I have two multivariate time series x and y, both covering approximately the same range in time (one starts two years before the other, but they end on the same date). Both series have missing observa
I´d like to extract years from a time series index (the underlying time series is of monthly frequency). The reason I want to do it is creating a yearly axis, e.g.
My code plots 5000 points of time series data in a panel that is 581 pixels wide by default, but this width changes when the user resizes the window.My code also plots several rectangular markers that
I figured out a way to backcast (ie. predicting the past) with a time series. Now I\'m just struggling with the programming in R.
i have an array of date=>values, like this \"2010-10-12 14:58:36\" =>13.4 \"2010-10-17 14:58:36\" =>12