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| # | |
| # unique-bytes.R, 16 Jul 16 | |
| # | |
| # | |
| # Example from: | |
| # Empirical Software Engineering using R | |
| # Derek M. Jones | |
| source("ESEUR_config.r") | |
| window_width=256 # if this is less than 256 divisor has to change in call to plot | |
| plot_unique=function(filename) | |
| { | |
| t=readBin(filename, what="raw", n=1e7) | |
| # Sliding the window over every point is too much overhead | |
| cnt_points=seq(1, length(t)-window_width, 5) | |
| u=sapply(cnt_points, function(X) length(unique(t[X:(X+window_width)]))) | |
| plot(u/256, type="l", col=point_col, | |
| xlab="File offset", ylab="Fraction Unique\n") | |
| return(u) | |
| } | |
| dummy=plot_unique(paste0(ESEUR_dir, "Rlang/unique-bytes.pdf")) | |
| # dummy=plot_unique("http://shape-of-code.coding-guidelines.com/2013/05/17/preferential-attachment-applied-to-frequency-of-accessing-a-variable/") | |
| # | |
| # dummy=plot_unique("http://www.coding-guidelines.com/R_code/requirements.tgz") | |