Differences
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spatialspecial [2019/04/15 16:57] qcbs [Exercice 5] |
spatialspecial [2019/04/15 16:58] (current) qcbs [Exercice 7] |
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| Line 314: | Line 314: | ||
| #data2=tapply(Layer$new_area,Layer$IHO_Sea,mean) | #data2=tapply(Layer$new_area,Layer$IHO_Sea,mean) | ||
| library('dplyr') | library('dplyr') | ||
| - | library('sf') | ||
| Layer=data.frame(Layer) | Layer=data.frame(Layer) | ||
| data2=Layer%>%group_by(IHO_Sea)%>%summarize(mean=mean(new_area)) | data2=Layer%>%group_by(IHO_Sea)%>%summarize(mean=mean(new_area)) | ||
