删除与R中的某些值正确匹配的行

Question

我试图删除匹配R中的某个值的记录\\行。

这就是我现在拥有的：

RawSurvey <- read.csv("/Survey/RawSurvey.csv")

Country = RawSurvey[,132] #132nd variable is Country

Survey <- RawSurvey[which(Country != 'Israel' 
                      & Country != 'Canada'
                      & Country != 'Ukraine'
                      & Country != 'Afghanistan'
                      & Country != 'Oman'
                      & Country != 'Argentina'
                      ),]

我不认为它会丢掉记录 - 我的意思是当我做总结时（Survey $ Country）他们仍然出现但是0，即阿根廷 - 0。

Answer 1

您可以使用%in%来节省大量复杂性，例如

countriesToDrop<-c("Israel","Canada","Ukraine","Afghanistan","Oman","Argentina");
Survey<-RawSurvey[!(RawSurvey[,132]%in%countriesToDrop),]

丢弃的国家出现0的事实是因子向量的正常预期行为; 如果你愿意，你可以通过重新计算因子水平来删除它们，如下所示：

Survey[,132]<-factor(Survey[,132])