Lines Matching refs:SDcols

3606 "you're looking for 'DT[,lapply(.SD,mean),by=,.SDcols=]'. See ?data.table."
3609 "SD,mean),by=,.SDcols=]'。参见 ?data.table 。"
3654 "likely, you may be looking for 'DT[,lapply(.SD,min),by=,.SDcols=]'"
3659 "SDcols=]'"
3705 "likely, you may be looking for 'DT[,lapply(.SD,max),by=,.SDcols=]'"
3710 "的命令是 'DT[,lapply(.SD,max),by=,.SDcols=]'"
3742 "by=,.SDcols=]'"
3747 "的命令是 'DT[,lapply(.SD,median),by=,.SDcols=]'"
3822 "diagonal elements, 'DT[,lapply(.SD,var),by=,.SDcols=]' is the optimized way "
3828 "佳的方式是使用'DT[,lapply(.SD,var),by=,.SDcols=]'。"
3857 "likely, you may be looking for 'DT[,lapply(.SD,prod),by=,.SDcols=]'"
3861 "闭GForce优化。你可以试试'DT[,lapply(.SD,prod),by=,.SDcols=]'"