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R : Copyright 2001, The R Development Core TeamVersion 1.3.0 Under development (unstable) (2001-02-19)R is free software and comes with ABSOLUTELY NO WARRANTY.You are welcome to redistribute it under certain conditions.Type `license()' or `licence()' for distribution details.R is a collaborative project with many contributors.Type `contributors()' for more information.Type `demo()' for some demos, `help()' for on-line help, or`help.start()' for a HTML browser interface to help.Type `q()' to quit R.> library(foreign)> pc5 <- read.dta("pc5.dta")> summary(pc5)age alb alkphos ascitesMin. :26.28 Min. :1.960 Min. : -9 Min. :-9.0001st Qu.:42.71 1st Qu.:3.330 1st Qu.: 423 1st Qu.: 0.000Median :50.47 Median :3.570 Median : 1009 Median : 0.000Mean :50.45 Mean :3.543 Mean : 1525 Mean :-2.0743rd Qu.:56.99 3rd Qu.:3.820 3rd Qu.: 1677 3rd Qu.: 0.000Max. :78.44 Max. :4.640 Max. :13862 Max. : 1.000bili chol edema edemarxMin. : 0.300 Min. : -9.0 Min. :0.00000 Min. :0.000001st Qu.: 0.700 1st Qu.: -9.0 1st Qu.:0.00000 1st Qu.:0.00000Median : 1.200 Median : 256.0 Median :0.00000 Median :0.00000Mean : 2.688 Mean : 245.8 Mean :0.09256 Mean :0.078153rd Qu.: 3.000 3rd Qu.: 346.0 3rd Qu.:0.00000 3rd Qu.:0.00000Max. :28.000 Max. :1775.0 Max. :1.00000 Max. :1.00000hepmeg time plate protimeMin. :-9.000 Min. : 41 Min. : -9.0 Min. : 9.001st Qu.: 0.000 1st Qu.:1434 1st Qu.:181.0 1st Qu.:10.00Median : 0.000 Median :1487 Median :249.0 Median :10.60Mean :-1.750 Mean :1760 Mean :252.0 Mean :10.673rd Qu.: 1.000 3rd Qu.:2153 3rd Qu.:321.0 3rd Qu.:11.00Max. : 1.000 Max. :4795 Max. :721.0 Max. :18.00sex sgot spiders stageMin. :-9.000 Min. : -9.00 Min. :-9.000 Min. :-9.00001st Qu.: 0.000 1st Qu.: 44.20 1st Qu.: 0.000 1st Qu.: 1.0000Median : 1.000 Median : 88.35 Median : 0.000 Median : 3.0000Mean :-1.434 Mean : 88.22 Mean :-1.914 Mean : 0.13513rd Qu.: 1.000 3rd Qu.:130.20 3rd Qu.: 0.000 3rd Qu.: 3.0000Max. : 1.000 Max. :457.25 Max. : 1.000 Max. : 4.0000cens rx trig copperMin. :0.0000 Min. :-9.0000 Min. : -9.00 Min. : -9.001st Qu.:0.0000 1st Qu.: 1.0000 1st Qu.: -9.00 1st Qu.: 10.00Median :0.0000 Median : 1.0000 Median : 85.00 Median : 48.00Mean :0.2443 Mean :-0.9788 Mean : 81.44 Mean : 65.263rd Qu.:0.0000 3rd Qu.: 2.0000 3rd Qu.:126.00 3rd Qu.: 88.00Max. :1.0000 Max. : 2.0000 Max. :598.00 Max. :588.00id first late t0Min. : 1.0 Min. :0.0000 Min. :0.0000 Min. : 0.01st Qu.: 99.5 1st Qu.:0.0000 1st Qu.:0.0000 1st Qu.: 0.0Median :195.0 Median :0.0000 Median :0.0000 Median : 0.0Mean :199.6 Mean :0.3657 Mean :0.3657 Mean : 543.83rd Qu.:302.5 3rd Qu.:1.0000 3rd Qu.:1.0000 3rd Qu.:1487.0Max. :418.0 Max. :1.0000 Max. :1.0000 Max. :1487.0> str(pc5)`data.frame': 659 obs. of 24 variables:$ age : num 58.8 56.4 56.4 70.1 54.7 ...$ alb : num 2.60 4.14 4.14 3.48 2.54 ...$ alkphos: num 1718 7395 7395 516 6122 ...$ ascites: num 1 0 0 0 0 0 0 0 0 0 ...$ bili : num 14.5 1.1 1.1 1.4 1.8 ...$ chol : num 261 302 302 176 244 244 279 279 248 248 ...$ edema : num 1 0 0 1 1 1 0 0 0 0 ...$ edemarx: num 1 0 0 0.5 0.5 0.5 0 0 0 0 ...$ hepmeg : num 1 1 1 0 1 1 1 1 1 1 ...$ time : num 400 1487 4500 1012 1487 ...$ plate : num 190 221 221 151 183 183 136 136 -9 -9 ...$ protime: num 12.2 10.6 10.6 12.0 10.3 ...$ sex : num 1 1 1 0 1 1 1 1 1 1 ...$ sgot : num 137.9 113.5 113.5 96.1 60.6 ...$ spiders: num 1 1 1 0 1 1 1 1 0 0 ...$ stage : num 4 3 3 4 4 4 3 3 3 3 ...$ cens : num 1 0 0 1 0 1 0 0 0 1 ...$ rx : num 1 1 1 1 1 1 2 2 2 2 ...$ trig : num 172 88 88 55 92 92 72 72 63 63 ...$ copper : num 156 54 54 210 64 64 143 143 50 50 ...$ id : num 1 2 2 3 4 4 5 5 6 6 ...$ first : num 0 1 0 0 1 0 1 0 1 0 ...$ late : num 0 0 1 0 0 1 0 1 0 1 ...$ t0 : num 0 0 1487 0 0 ...- attr(*, "datalabel")= chr ""- attr(*, "time.stamp")= chr "14 Feb 1997 14:22"- attr(*, "formats")= chr "%9.0g" "%9.0g" "%9.0g" "%9.0g" ...- attr(*, "var.labels")= chr "" "" "" "" ...> sun6 <- read.dta("sun6.dta")> summary(sun6)age alb alkphos ascitesMin. :26.28 Min. :1.960 Min. : -9 Min. : 0.001st Qu.:42.71 1st Qu.:3.330 1st Qu.: 423 1st Qu.: 0.00Median :50.47 Median :3.570 Median : 1009 Median : 0.00Mean :50.45 Mean :3.543 Mean : 1525 Mean : 58.143rd Qu.:56.99 3rd Qu.:3.820 3rd Qu.: 1677 3rd Qu.: 1.00Max. :78.44 Max. :4.640 Max. :13862 Max. :247.00bili chol edema edemarxMin. : 0.300 Min. : 120 Min. :0.00000 Min. :0.000001st Qu.: 0.700 1st Qu.: 267 1st Qu.:0.00000 1st Qu.:0.00000Median : 1.200 Median : 376 Median :0.00000 Median :0.00000Mean : 2.688 Mean :20235 Mean :0.09256 Mean :0.078153rd Qu.: 3.000 3rd Qu.:65527 3rd Qu.:0.00000 3rd Qu.:0.00000Max. :28.000 Max. :65527 Max. :1.00000 Max. :1.00000hepmeg time plate protimeMin. : 0.00 Min. : 41 Min. : 62 Min. : 9.001st Qu.: 0.00 1st Qu.:1434 1st Qu.: 195 1st Qu.:10.00Median : 1.00 Median :1487 Median : 256 Median :10.60Mean : 58.46 Mean :1760 Mean : 2340 Mean :10.673rd Qu.: 1.00 3rd Qu.:2153 3rd Qu.: 330 3rd Qu.:11.00Max. :247.00 Max. :4795 Max. :65527 Max. :18.00sex sgot spiders stageMin. : 0.00 Min. : -9.00 Min. : 0.0 Min. : 1.001st Qu.: 1.00 1st Qu.: 44.20 1st Qu.: 0.0 1st Qu.: 3.00Median : 1.00 Median : 88.35 Median : 0.0 Median : 3.00Mean : 58.78 Mean : 88.22 Mean : 58.3 Mean : 60.353rd Qu.: 1.00 3rd Qu.:130.20 3rd Qu.: 1.0 3rd Qu.: 4.00Max. :247.00 Max. :457.25 Max. :247.0 Max. :247.00cens rx trig copperMin. :0.0000 Min. : 1.00 Min. : 33.0 Min. : 41st Qu.:0.0000 1st Qu.: 1.00 1st Qu.: 91.5 1st Qu.: 47Median :0.0000 Median : 2.00 Median : 143.0 Median : 84Mean :0.2443 Mean : 59.23 Mean :20468.2 Mean :157783rd Qu.:0.0000 3rd Qu.: 2.00 3rd Qu.:65527.0 3rd Qu.: 396Max. :1.0000 Max. :247.00 Max. :65527.0 Max. :65527id first late t0Min. : 1.0 Min. :0.0000 Min. :0.0000 Min. : 0.01st Qu.: 99.5 1st Qu.:0.0000 1st Qu.:0.0000 1st Qu.: 0.0Median :195.0 Median :0.0000 Median :0.0000 Median : 0.0Mean :199.6 Mean :0.3657 Mean :0.3657 Mean : 543.83rd Qu.:302.5 3rd Qu.:1.0000 3rd Qu.:1.0000 3rd Qu.:1487.0Max. :418.0 Max. :1.0000 Max. :1.0000 Max. :1487.0> str(sun6)`data.frame': 659 obs. of 24 variables:$ age : num 58.8 56.4 56.4 70.1 54.7 ...$ alb : num 2.60 4.14 4.14 3.48 2.54 ...$ alkphos: num 1718 7395 7395 516 6122 ...$ ascites: int 1 0 0 0 0 0 0 0 0 0 ...$ bili : num 14.5 1.1 1.1 1.4 1.8 ...$ chol : int 261 302 302 176 244 244 279 279 248 248 ...$ edema : int 1 0 0 1 1 1 0 0 0 0 ...$ edemarx: num 1 0 0 0.5 0.5 0.5 0 0 0 0 ...$ hepmeg : int 1 1 1 0 1 1 1 1 1 1 ...$ time : int 400 1487 4500 1012 1487 1925 1487 1504 1487 2503 ...$ plate : int 190 221 221 151 183 183 136 136 65527 65527 ...$ protime: num 12.2 10.6 10.6 12.0 10.3 ...$ sex : int 1 1 1 0 1 1 1 1 1 1 ...$ sgot : num 137.9 113.5 113.5 96.1 60.6 ...$ spiders: int 1 1 1 0 1 1 1 1 0 0 ...$ stage : int 4 3 3 4 4 4 3 3 3 3 ...$ cens : int 1 0 0 1 0 1 0 0 0 1 ...$ rx : int 1 1 1 1 1 1 2 2 2 2 ...$ trig : int 172 88 88 55 92 92 72 72 63 63 ...$ copper : int 156 54 54 210 64 64 143 143 50 50 ...$ id : int 1 2 2 3 4 4 5 5 6 6 ...$ first : int 0 1 0 0 1 0 1 0 1 0 ...$ late : int 0 0 1 0 0 1 0 1 0 1 ...$ t0 : int 0 0 1487 0 0 1487 0 1487 0 1487 ...- attr(*, "datalabel")= chr ""- attr(*, "time.stamp")= chr "14 Sep 2000 10:40"- attr(*, "formats")= chr "%9.0g" "%9.0g" "%9.0g" "%9.0g" ...- attr(*, "var.labels")= chr "" "" "" "" ...> q()