search for: board2

...(mean, variance, n) for the data grouped by school authority and by exam topic. I have tried the by() function but that seems to only be able to handle one level of grouping. In particular what I would like is something like the following Board Subject Mean Variance N board1 english 70 150 600 board2 english 66 210 510 board1 science 69 180 605 board2 science 71 220 520 and so on. I have already generated the stats that I need using "GROUP BY" in a select query in MySQL. I'm just curious now about doing the same thing in R thanks in advance, Neil

Hi All. I'd like to programm a 4 dimensional chart in R. Acctually I wanted to solve that problem in Excel cause I had the data there. Here is a link of my actual problem description (there are some chart pictures as well).... http://www.mrexcel.com/board2/viewtopic.php?t=187336&highlight=stacked+column because I still couldn't solve that problem I came to R. The chart should be actually a 3D chart of the type 3D Column Chart with following achsis: X Achsis: driven kilometre in 10000 blocks Y Achsis: Production month Z Achsis: number I need...

...2" "OCITY" "OZIP" "OAV_STAT" [31] "O_XCORD" "O_YCORD" "O_TAZ" "GETTO" "O_GETTO" "BUS1" [37] "BUS2" "BUS3" "BUS4" "BOARD1" "BOARD2" "DEPART1" [43] "DEPART2" "DPURP" "O_DPURP" "DCODE" "DNAME" "DGAVEHOM" [49] "DADDRESS" "DXSTRT1" "DXSTRT2" "DCITY" "DZIP" "DAV_STAT" [55]...