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Want to run

data_visit %>% group_by(post_pagename) %>% summarize(n_unique = n_distinct(visit_id)) 

But get error:

Fehler in group_by(., post_pagename) : konnte Funktion "group_by" nicht finden

Could not find group_by

Have installed dplyr and magrittr.

Library(dplyr) 

results in:

Fehler: package or namespace load failed for ‘dplyr’ in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]): Namensraum ‘rlang’ 0.1.6 ist bereits geladen, aber >= 0.2.0 wird gefordert Zusätzlich: Warnmeldung: Paket ‘dplyr’ wurde unter R Version 3.4.4 erstellt

1 Answer 1

1

Try to update the rlang package.

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