Why the output is not correct?

Question

I am trying to finish the last code project in R language, but I do not why I can not get the expected output. I can not get the correct mean
https://code.sololearn.com/cOY0N3X7V9kK/?ref=app

Answer 1

You can approach the task like this:

1. Make a subset of the data, only keep those rows for which age is >= 18
2. Use the subset to calculate the means (with tapply)

x$Age >= 18 will not work as it only returns a vector of booleans

Answer 2

x <- read.csv('/usercode/files/titanic.csv')
x <- x[x$Age >= 18, ]
tapply(x$Pclass, x$Survived, mean)

Answer 3

Thank you guys,
But what is Pclass SoloProg ?

Answer 4

Read the task description again: You are supposed to calculate the mean class grouped by survivial

Answer 5

Lisa DM is not working: Was willst du mit 🐈

Answer 6

Kkk