R-tidyverse

dplyr动词中使用外部向量

# 1. Using across(all_of())
vars <- c("gear", "carb", "am") 
mtcars %>%   distinct(across(all_of(vars)), .keep_all = TRUE) 
# 1. unquote-splice操作符!!!
mtcars %>%   distinct(!!!syms(vars), .keep_all = TRUE)

R-data.table

Julia-DataFrames

选择行

使用正则表达式

df3 = DataFrame(A=1:5,B=["ABCABCAB","ABC","AB","BB",missing])
@rsubset df3 @passmissing occursin(r"ABC", :B)

colMean

@time mean(Matrix(df_Tumour), dims=1)
@time mean.(eachrow(df_Tumour))
@time mean(Matrix(df_Tumour), dims=2) #faster

Python-pandas