常用代码速查表

Mengkelyu

读取数据

read.csv()
read.table()

lapply 应用于列表数据，类似Python的List Comprehension

lapply(input, myfun, arg1=6)

这里的arg1是myfun中另外的一些不用于循环的argument

列表转化为data.frame

name <- c("Tom", "Aron", "Gary","Jeannie")
gender <- c("Male", "Male", "Male", "Female")
age <- c(18, 20, 17, 21)
# Create a list from a vector
student_list <- list(
  name = name,
  gender = gender,
  age = age
  )
# Print the list of vectors  
student_list

# Convert the list to data frame
student_data = as.data.frame(student_list)
# Print the data frame
student_data