table() 函数不会在 R 中将男性和女性的数量加在一起（总初学者）

Question

I want to create a frequency table that displays the following:

1. Total number of students
2. Male students
3. Female students

I tried the following:

read.cvs2("Questionnaire")
data <- Questionnaire
students <- table(data$GENDER)
mStudents <- table(data$GENDER[data$GENDER == 1])
fStudents <- table(data$GENDER[data$GENDER == 2])

When I create the frequency table (as shown below) it the numbers are correct for male and female students but not for the total number of students.

freqTab <- cbind(students, mStudents, fStudents)

WHERE I BELIEVE THE ERROR IS:

in the environment pane under values, "students" this info: 'table' int [1:2 (1d)] and then the number of male and female students. How can I make this one number?

Answer 1

Would something like this work for you? (Example with the built-in mtcars data set.)

c(total = nrow(mtcars), table(mtcars$cyl))
## total     4     6     8 
##    32    11     7    14 

or

addmargins(table(mtcars$cyl))
##   4   6   8 Sum 
##  11   7  14  32