File:Estimació de Kaplan-Meier de la supervivència de malalts amb sida.svg

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Català: Dades de malalts amb sida d'Austrália

Descripció de les dades:

http://stat.ethz.ch/R-manual/R-patched/library/MASS/html/Aids2.html
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Source Own work
Author Pep Roca
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R code

## Biblioteca on estan les dades
library(MASS)
## Càlcul del temps i variable estat
Aids2$DIES = Aids2$death - Aids2$diag
## Fer la variable muda (factor) ESTAT al final del seguiment
Aids2$ESTAT = as.integer(Aids2$status == "D")
## Selecció dels homosexuals (el valor de la variable ''T.categ'' és "hs") i les dos variables d'interès
AIDS2_HS = subset(Aids2, T.categ=="hs", select = c(ESTAT, DIES, state))
AIDS2_HS = subset(Aids2, T.categ=="hs", select = c(DIES, ESTAT))
library(survival)
AIDS2_HS.KM <- survfit(Surv(AIDS2_HS$DIES, AIDS2_HS$ESTAT) ~ 1)
library(grDevices)
svg("mass_aids_hs_km_med.svg")
plot(AIDS2_HS.KM, mark.time="none", conf.int="none", main="Estimació de la supervivència de Kaplan-Meier", xlab="Temps (dies des del diagnòstic)", ylab="S(t): Proporció de vius",  xlim=c(0, 2000))
## Línea mediana
MEDIANA=print(read.table(textConnection(capture.output(AIDS2_HS.KM)),skip=2,header=TRUE)$median)
MEDIANA
lines(x=c(0, MEDIANA),y=c(0.5,0.5), lty=2)
lines(x=c(MEDIANA,MEDIANA),y=c(0.5,0), lty=2, col="red")
dev.off()

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Date/TimeThumbnailDimensionsUserComment
current08:23, 16 July 2012Thumbnail for version as of 08:23, 16 July 2012630 × 630 (83 KB)Pep Roca (talk | contribs)Línia vertical de la mediana en vermell
10:48, 11 July 2012Thumbnail for version as of 10:48, 11 July 2012630 × 630 (80 KB)Pep Roca (talk | contribs)

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