[R] Incoherence between arima.sim and auto.arima

Hello, I have a question about function arima.sim I tried to somulate a AR(1) process, with no innovation, no error term. I used this code: library(forecast) e=rnorm(100,mean=0,sd=0) series=arima.sim(model=list(ar=0.75),n=100,innov=e)+20 Then I tried to applicate ti this series auto.arima functi

Re: [R] Multivariate time series

luenced by regressors (for example sales are influenced by presence of promotion)? What can I do? Do I have to clean the data by regressors effect before using arimaId or can I use the original data? Thank you very much, I hope to receive your answer.. Giusy Giusy wrote: > > Hello to ever

Re: [R] Multivariate time series

49,99 ... ... ... What function can I use to have the model specified? And how can I insert the price as regressors? (I'm looking for a function like arimaId) Thank you very much Giusy Paul Gilbert wrote: > > Packa

[R] Multivariate time series

nyone help me? Thank you very much Giusy -- View this message in context: http://www.nabble.com/Multivariate-time-series-tf4786472.html#a13693139 Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://st

[R] RMySQL dbConnect

"localhost") and I receive this message: Errore in function (classes, fdef, mtable) : unable to find an inherited method for function "dbConnect", for signature "MySQLDriver" Can anyone help me? Thank you very much Giusy -- View this message in context: htt

[R] Elasticity

there is a more specific function. Thank you very much Giusy -- View this message in context: http://www.nabble.com/Elasticity-tf4535801.html#a12944924 Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https

[R] Sorry,an other question..

Hello, if I can I'd like to ask you an other thing..can I use with R specific function to correct outliers in time series? What can I do? Thank you very much Giusy -- View this message in context: http://www.nabble.com/Sorry%2Can-other-question..-tf4474255.html#a12756688 Sent from the R

[R] Time series analysis

Hello, my name is Giusy and it's the first time I post in this forum. I'm a beginner with R, I have to use it to analyse time series and I need some help about these problems: 1. In my time series there are some NA values, but functions (arimaId, arima,..) seem not to work in this c