Find Interview Questions for University of oulu

Right Answer:
R cluster analysis is a statistical technique used to group a set of objects in such a way that objects in the same group (or cluster) are more similar to each other than to those in other groups. In R, various functions and packages, such as `kmeans`, `hclust`, and `dbscan`, are used to perform cluster analysis on datasets to identify patterns and structures within the data.

Right Answer:
R commands are written as expressions or statements using R syntax, typically in the form of function calls, assignments, or control structures. Each command is usually written on a new line or can be separated by a semicolon. For example:

```R
x <- 5 # Assignment
y <- x + 10 # Another assignment
print(y) # Function call
```

Right Answer:
A control structure in R is a programming construct that allows you to control the flow of execution in your code. Common control structures include conditional statements (like `if`, `else`), loops (like `for`, `while`), and functions (like `switch`).

Right Answer:
R can be slower than some other programming languages, especially for large datasets or complex computations, but its performance can often be improved with optimized packages and techniques.

Right Answer:
The addition function used in R is `+`.