R语言学习-问题解决-Error in output$nodeID : $ operator is invalid for atomic vectors
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问题：在使用"$"符查看变量列的时候，报错Error in output$nodeID : $ operator is invalid for atomic vectors
output <- data$scoreoutput <- cbind(nodeID=dat$nodeID,score=output)head(output$nodeID) Error in output$nodeID : $ operator is invalid for atomic vectors#查看output的类型，发现是matrixclass(output) [1] "matrix"#"data.frame"才能用“$”，这里改用[,]操作就行head(output[,1])
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