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| # | |
| # pull-req-hclus.R, 10 Oct 16 | |
| # | |
| # Data from: | |
| # Georgios Gousios and Andy Zaidman | |
| # A Dataset for Pull Request Research | |
| # | |
| # Example from: | |
| # Empirical Software Engineering using R | |
| # Derek M. Jones | |
| source("ESEUR_config.r") | |
| homebrew_req=read.csv(paste0(ESEUR_dir, "communicating/pull-homebrew.csv.xz"), as.is=TRUE) | |
| # cor requires numeric columns | |
| columns = c("lifetime_minutes", "mergetime_minutes", | |
| "num_commits", "src_churn", "test_churn", | |
| "files_added", "files_deleted", | |
| "files_modified", "files_changed", | |
| "src_files", "doc_files", "other_files", | |
| "num_commit_comments", "num_issue_comments","num_comments", | |
| "num_participants", | |
| "sloc", "team_size", | |
| "perc_external_contribs", "commits_on_files_touched", | |
| "test_lines_per_kloc", "test_cases_per_kloc", "asserts_per_kloc", | |
| "watchers", | |
| "prev_pullreqs", "requester_succ_rate", "followers") | |
| used = subset(homebrew_req, select=columns) | |
| # Cross correlation | |
| ctab = cor(used, method = "spearman", use="complete.obs") | |
| pull_dist=as.dist((1-ctab)^2) | |
| t=hclust(pull_dist) | |
| plot(t, main="", sub="", | |
| xlab="Pull related variables", ylab="Height\n") | |
| # A packaged way of doing things | |
| # library("Hmisc") | |
| # | |
| # p=varclus(~ (lifetime_minutes+mergetime_minutes | |
| # +num_commits+src_churn+test_churn | |
| # +files_added+files_deleted | |
| # +files_modified+files_changed | |
| # +src_files+doc_files+other_files | |
| # +num_commit_comments+num_issue_comments | |
| # +num_participants | |
| # +sloc+team_size | |
| # +perc_external_contribs+commits_on_files_touched | |
| # +test_lines_per_kloc+test_cases_per_kloc+asserts_per_kloc | |
| # +watchers | |
| # +prev_pullreqs+requester_succ_rate+followers), | |
| # similarity="spearman", | |
| # data = used) | |
| # | |
| # plot(p) | |