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| # | |
| # MemDiskPrice-xl95.R, 10 Feb 18 | |
| # Data from: | |
| # www.jcmit.com | |
| # copyright 2000, 2004, 2007 John C. McCallum | |
| # e5a4abf7b6834e... data from: | |
| # Steven J. Davis and Jack MacCrisken and Kevin M. Murphy | |
| # Economic Perspectives on Software Design: {PC} Operating Systems and Platforms | |
| # | |
| # Example from: | |
| # Empirical Software Engineering using R | |
| # Derek M. Jones | |
| source("ESEUR_config.r") | |
| pal_col=rainbow(5) | |
| mag=read.csv(paste0(ESEUR_dir, "hardware/MemDiskPrice-mag.csv.xz"), as.is=TRUE) | |
| flash=read.csv(paste0(ESEUR_dir, "hardware/MemDiskPrice-flash.csv.xz"), as.is=TRUE) | |
| e5=read.csv(paste0(ESEUR_dir, "hardware/e5a4abf7b6834e_second-store.csv.xz"), as.is=TRUE) | |
| e5$date=seq(1983, 2001, by=0.5) # Off by a month or two in places | |
| hd=subset(mag, Type != "floppy") | |
| floppy=subset(mag, Type == "floppy") | |
| plot(hd$date, hd$Cost.US./hd$Size.MBytes, log="y", col=pal_col[1], | |
| xlab="Date", ylab="Dollars per MB\n") | |
| points(floppy$date, floppy$Cost.US./floppy$Size.MBytes, col=pal_col[2]) | |
| points(e5$date, e5$f5.25.360K/0.36, col=pal_col[2]) | |
| points(e5$date, e5$f5.25.1.2MB/1.2, col=pal_col[2]) | |
| points(e5$date, e5$f3.5.1.44MB/1.44, col=pal_col[2]) | |
| points(flash$date, flash$Cost.US./flash$Size.MBytes, col=pal_col[4]) | |
| points(e5$date, e5$CD.ROM.650MB/650, col=pal_col[3]) | |
| points(e5$date, e5$DVD.ROM.4.7GB/4.7e+3, col=pal_col[5]) | |
| legend(x="bottomleft", legend=c("Hard disc", "Floppy drive (various capacities)", "CD drive", "Flash memory", "DVD drive"), bty="n", fill=pal_col, cex=1.2) | |