x<-read.csv("input_file.csv")
看起来像...... After reading the csv file
所以要计算时间列的第90个PERCENTILE列,以命名具有相同字符的列。我用过这个:
aggregate(df$Time, by=list(Name=df$Name), FUN=function(x) quantile(x, probs =0.9))
但它会出现如下错误:
Error in df$Time : object of type 'closure' is not subsettable
请帮忙。