> names(data1)
[1] "gender" "id" "race" "ses" "schtyp" "prgtype" "read" "write" "math" "science" "socst"
> head(data1)
gender id race ses schtyp prgtype read write math science socst
1 0 70 4 1 1 general 57 52 41 47 57
2 1 121 4 2 1 vocati 68 59 53 63 61
3 0 86 4 3 1 general 44 33 54 58 31
4 0 141 4 3 1 vocati 63 44 47 53 56
5 0 172 4 2 1 academic 47 52 57 53 61
6 0 113 4 2 1 academic 44 52 51 63 61
> dim(data1)
[1] 200 11
> # saves as an R object
> save(data1,file="data1.rda")
> # checking to see if data1.rda has been created
> dir()
[1] "asg1-40" "data1.rda" "desktop.ini" "FMS_data.txt" "FMS_data_edited.dat"
[6] "FMS_data_edited.sav" "HGDP_AKT1.txt" "hs0.rda" "JHS_NPHP1_single_sheet_wy0111.dat" "MolecularWeight_tair7.xls"
[11] "My Music" "My Pictures" "My Videos" "R" "rtn.txt"
[16] "rtn.xlsx" "SafeNet Sentinel" "SPSSInc" "TargetP_analysis_tair7.xls" "test1230.txt"
[21] "Virco_data.csv"
> # list of rda files
> ls()
[1] "data1" "hs0"
> # clear everything out of memory
> rm(list=ls())
> ls()
character(0)
> # load the R data into memory
> load("data1.rda")
> tail(data1)
gender id race ses schtyp prgtype read write math science socst
195 1 179 4 2 2 academic 47 65 60 50 56
196 1 31 2 2 2 general 55 59 52 42 56
197 1 145 4 2 1 vocati 42 46 38 36 46
198 1 187 4 2 2 general 57 41 57 55 52
199 1 118 4 2 1 general 55 62 58 58 61
200 1 137 4 3 1 academic 63 65 65 53 61
>
> rm(list=ls()) # clear everything out of memory
> ls()
character(0)
> temp <- read.table("http://www.ats.ucla.edu/stat/R/notes/hs0_1.csv", header=F, sep=",")
> temp[9,]
V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11
9 0 84 4 2 1 general 63 57 54 NA 51
> names(temp) <- c("gender","id","race","ses","schtyp","prgtype","read","write","math","science","socst")
> # list observations 5 through 10 to check the data
> temp[5:10, ]
gender id race ses schtyp prgtype read write math science socst
5 0 172 4 2 1 academic 47 52 57 53 61
6 0 113 4 2 1 academic 44 52 51 63 61
7 0 50 3 2 1 general 50 59 42 53 61
8 0 11 1 2 1 academic 34 46 45 39 36
9 0 84 4 2 1 general 63 57 54 NA 51
10 0 48 3 2 1 academic 57 55 52 50 51
>
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