The “dplyr” package
Homework:
1. Read the chicago data
into the variable “Chicago”.
2. Use histograms to
examine the completeness of the data on the following variables:
a) tmpd
b) dptp
c) pm25tmeans2
d) pm10tmeans2
e) o3means2
f) no2mean2
3. What is your opinion
as to how the missing data might bias any analysis?
4. Using group_by and
summarize, create an analysis to determine the seasonality pattern in 03 and
no2 by temperature declles.
5. Using group_by and summarize, create an
analysis to determine the seasonality pattern in 03 and no2 by dew point
deciles.
6. What, if anything, can you conclude from
the analyses?
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