{"action":"opened","issue":{"url":"https://api.github.com/repos/jslefche/piecewiseSEM/issues/34","labels_url":"https://api.github.com/repos/jslefche/piecewiseSEM/issues/34/labels{/name}","comments_url":"https://api.github.com/repos/jslefche/piecewiseSEM/issues/34/comments","events_url":"https://api.github.com/repos/jslefche/piecewiseSEM/issues/34/events","html_url":"https://github.com/jslefche/piecewiseSEM/issues/34","id":121557811,"number":34,"title":"how to declare correlation? ","user":{"login":"paternogbc","id":9639481,"avatar_url":"https://avatars.githubusercontent.com/u/9639481?v=3","gravatar_id":"","url":"https://api.github.com/users/paternogbc","html_url":"https://github.com/paternogbc","followers_url":"https://api.github.com/users/paternogbc/followers","following_url":"https://api.github.com/users/paternogbc/following{/other_user}","gists_url":"https://api.github.com/users/paternogbc/gists{/gist_id}","starred_url":"https://api.github.com/users/paternogbc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/paternogbc/subscriptions","organizations_url":"https://api.github.com/users/paternogbc/orgs","repos_url":"https://api.github.com/users/paternogbc/repos","events_url":"https://api.github.com/users/paternogbc/events{/privacy}","received_events_url":"https://api.github.com/users/paternogbc/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-12-10T19:17:31Z","updated_at":"2015-12-10T19:17:31Z","closed_at":null,"body":"Hi, thanks for this nice contribution.\r\n\r\nI would like to know if this packages allows the inclusion of correlation between two variables (A,B) or if all paths must be causal? I notice that in the examples explored in the manuscript there are only causal relationships.\r\n\r\nI am working on a phylogenetic path analysis where I want to declare simple correlations between some pairs of variables (usually a two-side arrow in path diagrams) in the model. Could you please give me some advice on that?\r\n\r\nFurther I am getting the following error while installing your package on R v3.2:\r\n> Warning: replacing previous import by ‘ggplot2::unit’ when loading ‘Hmisc’\r\nWarning: replacing previous import by ‘ggplot2::arrow’ when loading ‘Hmisc’\r\nWarning: replacing previous import by ‘scales::alpha’ when loading ‘Hmisc’\r\nError in eval(expr, envir, enclos) : \r\n  não foi possível encontrar a função \"eval\"\r\nError : unable to load R code in package ‘Hmisc’\r\nERROR: lazy loading failed for package ‘Hmisc’\r\n* removing ‘/home/paternogbc/R/x86_64-pc-linux-gnu-library/3.2/Hmisc’\r\nWarning in install.packages :\r\n  installation of package ‘Hmisc’ had non-zero exit status\r\nERROR: dependency ‘Hmisc’ is not available for package ‘lmerTest’\r\n* removing ‘/home/paternogbc/R/x86_64-pc-linux-gnu-library/3.2/lmerTest’\r\nWarning in install.packages :\r\n  installation of package ‘lmerTest’ had non-zero exit status\r\nERROR: dependency ‘lmerTest’ is not available for package ‘piecewiseSEM’\r\n* removing ‘/home/paternogbc/R/x86_64-pc-linux-gnu-library/3.2/piecewiseSEM’\r\nWarning in install.packages :\r\n  installation of package ‘piecewiseSEM’ had non-zero exit status\r\n\r\nThanks in advance!"}}