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| # | |
| # hardware-market.R, 21 Nov 17 | |
| # | |
| # Data from: | |
| # Mainframe & mini sales | |
| # The Postwar Evolution of Computer Prices | |
| # Robert J. Gordon | |
| # plus, a correction from Einstein and Franklin table 1 | |
| # The 1992 Annual Computer Industry Almanac (page 502) has | |
| # much larger numbers for Mini units and ??? | |
| # | |
| # http://jeremyreimer.com/m-item.lsp?i=137 | |
| # Posted by: Jeremy Reimer on Fri Dec 7 11:06:14 2012. | |
| # | |
| # Worldwide Smartphone Sales | |
| # Gartner, via https://en.wikipedia.org/wiki/Mobile_operating_system | |
| # | |
| # Example from: | |
| # Empirical Software Engineering using R | |
| # Derek M. Jones | |
| source("ESEUR_config.r") | |
| library(lubridate) | |
| library(plyr) | |
| pal_col=rainbow(5) | |
| sum_quarters=function(df) | |
| { | |
| return(data.frame(smartphones=sum(df$Total.smartphones), | |
| phones=sum(df$Total.phones))) | |
| } | |
| plot_ms=function(years, ms, col_ind) | |
| { | |
| lines(years, ms, col=pal_col[col_ind]) | |
| } | |
| mmm_sales=read.csv(paste0(ESEUR_dir, "hardware/w2227.csv.xz"), as.is=TRUE) | |
| hard_ms=read.csv(paste0(ESEUR_dir, "hardware/computer-marketshare.csv.xz"), as.is=TRUE) | |
| phone_sales=read.csv(paste0(ESEUR_dir, "hardware/phone-sales.csv.xz"), as.is=TRUE) | |
| phone_sales$Year=year(as.Date(phone_sales$Date)) | |
| phones_year=ddply(phone_sales, .(Year), sum_quarters) | |
| phones_year=subset(phones_year, Year < 2017) | |
| y_bound=c(0.1, max(phones_year$smartphones, na.rm=TRUE)) | |
| plot(mmm_sales$year, mmm_sales$MF_units/1e3, type="l", log="y", col=pal_col[1], | |
| xlim=c(1955, 2016), ylim=y_bound, | |
| xlab="Year", ylab="Units shipped (thousands)\n") | |
| lines(mmm_sales$year, mmm_sales$mini_units/1e3, col=pal_col[2]) | |
| # text(1962, 20, "Mainframes", cex=1.3) | |
| # text(1975, 50, "Minicomputers", cex=1.3) | |
| plot_ms(hard_ms$Year, hard_ms$IBM.PC.clones, 3) | |
| # plot_ms(hard_ms$Year, hard_ms$Amiga, 2) | |
| # plot_ms(hard_ms$Year, hard_ms$Apple.II, 3) | |
| # plot_ms(hard_ms$Year, hard_ms$Atari.400.800, 4) | |
| # plot_ms(hard_ms$Year, hard_ms$Atari.ST, 4) | |
| # plot_ms(hard_ms$Year, hard_ms$Commodore.64, 5) | |
| plot_ms(hard_ms$Year, hard_ms$Macintosh, 4) | |
| # plot_ms(hard_ms$Year, hard_ms$Other, 7) | |
| # plot_ms(hard_ms$Year, hard_ms$Tablets, 1) | |
| # plot_ms(hard_ms$Year, hard_ms$Smartphones, 8) | |
| plot_ms(phones_year$Year, phones_year$smartphones, 5) | |
| # plot_ms(phones_year$Year, phones_year$phones-phones_year$smartphones, 6) | |
| legend(x="bottomright", legend=c("Mainframes", "Minicomputers", "PCs", "Macintosh", "Smartphones"), bty="n", fill=pal_col, cex=1.2) | |