Solutions to the intermediate exercises of T4 of the data science course in the spring semester 2022

T4-ExerciseSolution

# T4: Intermediate exercises and possible solutions

# I. Create a vector with the numbers from -2 to 19 (step size: 0.75)
ex_1 <- seq(from=-2, to=19, by=0.75)
ex_1

# II. Create an index vector for this first vector (note: an index vector is a 
#       vector with all possible indices of the original vector)
ex_1_index <- seq(1, length(ex_1))
ex_1_index

# III. Compute the log of each element of the first vector using vectorisation. 
#        Anything that draws your attention?
ex_1_log <- log(ex_1)
ex_1_log

# IV. What happens if you concatenate vectors of different types using c()? 
#      Can you derive a systematization?
v_1 <- "hello"
v_2 <- c(2.3, 8)
v_3 <- c(v_1, v_2)
typeof(v_3)

v_4 <- 1L
v_5 <- c(FALSE, TRUE)
v_6 <- c(v_4, v_5)
typeof(v_6)

v_7 <- c(v_3, v_6)
typeof(v_7)