Question

R language

Please create a data frame. There two columns in the frame: one is instructors’ names and another is studentnumbers. There are 5 rows totally, and 2 instructors. Each instructor can have several student numbers and appear several times.

Answer 1

CODE IN R:

#Create a data frame using the inbuitlt function called data.frame()
#Data frame is basically serialized list of vectors having equal length,but can be hetrogenoues.

#We create 2 vectors that hold the Instructors' names and the student numbers
Instructor_name = c("Norman","Kendrick","Norman","Norman","Kendrick")
StudentNumbers = c(20,30,40,50,60)
#These two vectors now contain our data.

#Since these two vectors are of same length,we can easily combine them into a dataframe
#We need to pass Instructors_names and the StudentNumbers as arguments to the dataframe function
#We need to set stringsAsFactors tp false as by defalut it is true.
#This is done to prevent the data frame from converting string data type to factor type

DataFrame = data.frame(Instructor_name,StudentNumbers,stringsAsFactors=FALSE)

# Print the data frame.          
print(DataFrame)

OUTPUT:

CODE SNIPPET:

NOTE: You can set default values to the data frame by declaring the values in the argument itself.