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# | |
# grant-sackman.R, 4 Mar 20 | |
# Data from: | |
# The 28:1 {Grant}/{Sackman} legend is misleading, or: {How} large is interpersonal variation really? | |
# Lutz Prechelt | |
# | |
# Example from: | |
# Evidence-based Software Engineering: based on the publicly available data | |
# Derek M. Jones | |
# | |
# TAG experiment_human developer_performance | |
source("ESEUR_config.r") | |
library("vioplot") | |
pal_col=rainbow(8) | |
gs=read.csv(paste0(ESEUR_dir, "developers/grant-sackman.csv.xz"), as.is=TRUE) | |
vioplot(time ~ group+task, data=gs, horizontal=TRUE, col=pal_col, | |
xaxs="i", | |
ylim=c(0, max(gs$time)), | |
xlab="Time (minutes)", ylab="") | |
# library("plyr") | |
# | |
# daply(gs, .(task), function(df) max(df$time)/min(df$time)) | |
# daply(gs, .(task, group), function(df) max(df$time)/min(df$time)) | |