What is meant by return in R coding?

Question about how this ^ written in R?

The last question in lecture 4, How do we make a function in R

What is the dimension and how do we get it And way vector do not have dimensions and how we convert it to have dimension

When we can use & and && ?

How do we rename the data column?

If the list doesn't appear in the global environment

Logic operators

cross tabulation, And need to know the difference between the dependent and explanatory variable.

Why when we use apply on single column the code get error but when we use function apply on two column the code run smoothly

Why the error is obtained when use the attach (iris) in R programming

Why numeric 2, And what is the dependent variable

Why library dateset does not run

What the if else and how we use it

the difference between the dependent and explanatory variable.

The difference between function attach and detach

Question about the code of explanatory and dependent variable

Question about the dataframe that had ID patient , systolic, diastolyic BP

NOTE: the code in the lecture do not write in correct manner The correct is Std_sys_bp[i]=sd(patient_data$systolic_bp[patient_data$patient_id=i])