search for: aggegation

Hello: When I use SPSS I execute the AGGREGATE DATA comand for the next data: 2112141123212213212213334 3143244113442312121213344 2114141123112214212113344 2112211122212413421213221 3114444123442414343413344 2312231223212222323223322 2143241123212313131213234 2113241113212313222213333 2113141123112214212113344 2114141123412111114413344 2113211122342314222313234 2114141123112414212113344

Dear r-help reader, I have some problems with the aggregate function. My datframe looks like >frame Day Time V1 V2 1 M 0 3 NA 2 M 0 4 NA 3 M 0 5 2 4 M 1 NA 4 5 M 1 10 6 6 T 0 4 45 7 T 1 4 3 8 T 1 3 2 9 T 1 6 1 I used the aggegate function to obtain the mean in V1 and V2 over the grouping variable Time and Day

>From what I read this should work. So please help my misunderstanding: > x <- data.frame(Name=c("A","A","C"), Category=c("a","a","b"), Quantity=c(1,2,3)) > x Name Category Quantity 1 A a 1 2 A a 2 3 C b 3 > aggregate(x,

...p.com>, ported from SAS code written by Renee Jaramillo <rjaramillo@constellagroup.com> Description: The RAGG package performs aggregation of gridded CMAQ model data. The pacakge reads event data from Models3 IO-API files and outputs the aggregated annual data in Models3 IO-API file(s). Aggegation came about as a means to provide CMAQ-based estimates of total annual deposition and average annual concentrations. CMAQ is an episodic model requiring detailed meteorological and emissions inputs. Because of the extensive inputs and the time required to run CMAQ, it would be cost-prohibitive to si...