代做script留学生、代写R设计、R编程语言调试、代写histogram

日期：2019-10-03 10:44

Homework Assignment #1

1. Download Canadian monthly housing starts in urban centres over 10,000 (1950-now, total

dwellings) from CanSim and save it as tab-delimited txt file.

2. Start a R script with appropriate header and read in the txt data. Create a data frame with two

variables. The first one should include the dates (yyyy-mm) and the second one the

corresponding housing starts.

3. Create a histogram of the housing starts variable, comment on why it looks the way it looks and

if this is useful information.

4. Create a time series graph of housing starts, try to get the dates on the x-axis.

5. Create a function that takes in a vector x and calculates the growth rates (𝑙𝑛(𝑥𝑡) − 𝑙𝑛(𝑥𝑡−1)).

Within the function,

a. Determine the length of the input vector x and save it as n.

b. if the minimum element of the vector is negative, add the absolute value of this

minimum plus 1 to the vector, so that the new minimum is 1.

c. Take the natural logarithm of this new vector

d. Subtract the vector elements 1 to (n-1) from the vector elements 2 to n to get the

growth rates

e. Add an NaN to the beginning of the vector

f. Return the final vector

6. Create a vector v = [-2, 0, -1, 3, 5, 7, 12] and try out your function.

7. Apply your function to the housing starts variable.

8. Plot the new housing starts growth rates.