Question

I am a beginner in R.

After watching a number of tutorials on regression analysis (on youtube), I decided to make up my own data set and apply what I learnt to it. This is what I did!

I wanted to randomly create a list of salaries, ages and marital status.

Salaries

salary = sample(2000:3000, 250, replace = T)

Ages

ages = sample(20:50, 250, replace = T)

MaritalStatus

marSt = sample(c("MARRIED", "SINGLE"), 250, repeat = T)

Then, I combined the three sets of data with:

dataset = cbind(salary, ages, marSt)

Finally, I tried to run a regression on what I thought was my new data set with this command:

data.reg = lm(salary~ages+marSt, data = dataset)

… only for me to be told that there was an error and that the object “dataset” was actually NOT a dataset.

My question is two fold:
(i) Is it possible to create data sets from combinations of vectors?
(ii) If no, is there any way in R to create data sets without importing them from other sources?

Thank you very much and please I am a beginner and do not be too sophisticated in your response.

Answer 1

You probably want a data.frame not a matrix (as returned by cbind),

dataset <- data.frame(salary, ages, marSt)

also, repeat is not an argument of sample(), you probably mean replace=TRUE. You would do well to read an introduction to R.