# Clear environment
Homework I – Econometrics I 2024/25 Fall
Q-01) Add the command which clears the environment
Q-02) Create a string variable, which states: This is my first assignment in R!
<- str_var
Q-03) Create vector gdppc
, which contains the values of: 12, 18, 25, 13, 16 and 14
<- gdppc
Q-04) Multiply this vector with 10,000 and name it as gdppc_10
<- gdppc_10
Q-05) Create an other vector called lifeexp
with values of: 62, 68, 73, 65, 66 and 69
<- lifeexp
Q-06) Calculate the average of lifeexp as avg_le
<- avg_le
Q-07) Calculate the average of gdppc as avg_gdppc
<- avg_gdppc
Q-08) Store the two vectors in a data.frame()
object and call it df
. Use their names for colnames.
<- df
Q-09) Calculate the covariance matrix of df
with the function cov()
and name it as vcov
.
<- vcov
Q-10) Take the covariance of lifeexp
and gdppc
and divide by the variance of the gdppc
. Name it beta
! Hint: check your vcov
variable and use indexing to get the appropropriate elements.
<- beta