Re: [R] Excel Trend Function

2008-07-13 Thread Daniel Malter
prüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von paulandpen Gesendet: Sunday, July 13, 2008 4:27 AM An: [EMAIL PROTECTED]; [EMAIL PROTECTED] Betreff: Re: [R] Excel Trend Function Hi Felipe, Daniel mentions imputation is a disputed practice. There are recom

Re: [R] Excel Trend Function

2008-07-13 Thread paulandpen
: "Felipe Carrillo" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Sunday, July 13, 2008 5:46 AM Subject: [R] Excel Trend Function Hi: I have a dataset and need to interpolate for missing days. In Excel I either average from sampled days from above and below the missing

Re: [R] Excel Trend Function

2008-07-12 Thread Daniel Malter
Hi, I would be careful with imputing values. Imputing is a disputed practice. Also, you seem to have huge variation in your data with a nonlinear trend. Since your data is time series data, you may consider modeling the time series and then to predict n-time periods ahead and use these predicted

[R] Excel Trend Function

2008-07-12 Thread Felipe Carrillo
Hi: I have a dataset and need to interpolate for missing days. In Excel I either average from sampled days from above and below the missing days or use the TREND function to make up for the missing values. I have been reading about na.approx, is this function similar to the TREND function? Which