practical codes

Question 1

how do we install psych packages

Answer 1

install.packages(“psych”)
library(psych)

Question 2

how do we make a histogram

Answer 2

hist($)

Question 3

how do we make a density plot

Answer 3

dens<-density(_$)
plot(dens)

Question 4

what is the order we should investigate skewness

Answer 4

-ss
-dens
histogram

Question 5

how do we make boxplot and 2

Answer 5

boxplot($)
boxplot($,$)

Question 6

how do you make boxplot according to condition

Answer 6

boxplot($~$)

Question 7

how do we change the colour of the boxplot

Answer 7

($~$, frame=FALSE)
col=c(“ “ ,” “)

Question 8

how do we name axis

Answer 8

ylab “____” , xlab “___”
main= “ “- title
namesc(“No, Yes”)

Question 9

To clean our data we need to use the subset() function write this according to the practicaldata name set

Answer 9

practicaldata_filtered<- subset(practicaldata,ResponseId!= “Response ID”)

Question 10

You may have noticed that the previous command assigned (‘<-‘) the subset to a new object called ‘practicaldata_filtered’. ____________ to inspect this new object and check that in this new object, the first row from before is gone!

Answer 10

View(practicaldata_filtered)

Question 11

How would we delete the second row

Answer 11

practicaldata_filtered <- subset(practicaldata_filtered, ResponseId !=”{"ImportId":"_recordId"}”)

Question 12

how can we change variable names

Answer 12

datasetname_filtered$variablechanged

Question 13

How do we change the variable names so they arent numbers with variables

Answer 13

datasetname_filtered$variable <- as.numeric(datasetname_filtered$variable)

Question 14

sometimes we have to reverse scores so they are not netagitve , how is this done

Answer 14

example :
practicaldata_filtered$RSE_1_R <- 5-practicaldata_filtered$RSE_1)

Question 15

what is the way to attach a data set

Answer 15

attach(function)