In this exercise you will learn to plot data using the ggplot2 package. To this end, you will make your own note of 4.1 Categorical vs. Categorical from Data Visualization with R.

## Observations: 1,728
## Variables: 16
## $ price           <int> 132500, 181115, 109000, 155000, 86060, 120000, 1…
## $ lotSize         <dbl> 0.09, 0.92, 0.19, 0.41, 0.11, 0.68, 0.40, 1.21, …
## $ age             <int> 42, 0, 133, 13, 0, 31, 33, 23, 36, 4, 123, 1, 13…
## $ landValue       <int> 50000, 22300, 7300, 18700, 15000, 14000, 23300, …
## $ livingArea      <int> 906, 1953, 1944, 1944, 840, 1152, 2752, 1662, 16…
## $ pctCollege      <int> 35, 51, 51, 51, 51, 22, 51, 35, 51, 44, 51, 51, …
## $ bedrooms        <int> 2, 3, 4, 3, 2, 4, 4, 4, 3, 3, 7, 3, 2, 3, 3, 3, …
## $ fireplaces      <int> 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, …
## $ bathrooms       <dbl> 1.0, 2.5, 1.0, 1.5, 1.0, 1.0, 1.5, 1.5, 1.5, 1.5…
## $ rooms           <int> 5, 6, 8, 5, 3, 8, 8, 9, 8, 6, 12, 6, 4, 5, 8, 4,…
## $ heating         <fct> electric, hot water/steam, hot water/steam, hot …
## $ fuel            <fct> electric, gas, gas, gas, gas, gas, oil, oil, ele…
## $ sewer           <fct> septic, septic, public/commercial, septic, publi…
## $ waterfront      <fct> No, No, No, No, No, No, No, No, No, No, No, No, …
## $ newConstruction <fct> No, No, No, No, Yes, No, No, No, No, No, No, No,…
## $ centralAir      <fct> No, No, No, No, Yes, No, No, No, No, No, No, No,…

Q1 Stacked bar chart Plot the relationship between newConstruction and heating type.

Hint: See the code in 4.1.1 Stacked bar chart.

Q2 What is the most common heating system overall? Discuss your reason.

Hint: See the stacked bar chart you created in the previous question.

Hot air heating is the most common heating system overall in both new construction homes and in homes that have no new construction. We can see this in the stacked bar chart with hot air being the largest in the no new construction bar and hot air being the only bar in the new construction bar.

Q3 Grouped bar chart Plot the relationship between newContruction and heating type.

Hint: See the code in 4.1.2 Grouped bar chart.

Q4 Segmented bar chart Plot the relationship between newContruction and heating type.

Hint: See the code in 4.1.3 Segmented bar chart.

Q5 In which type of houses (new or old) is the proportion of hot air heating system higher? Discuss your reason.

Hint: See the segmented bar chart you created in the previous question.

In New Construction homes the proportion of hot air heating is much higher, due to almost every house having hot air heating where in old construction houses a lot of houses use hot water or electric.

Q6 Rename the construction type as new and old.

Hint: See the code in 4.1.4 Improving the color and labeling.

Q7 Add labels to the axes.

Hint: See the code in 4.1.4 Improving the color and labeling.

Q8 Hide the messages and the code, but display results of the code from the webpage.

Hint: Use message, echo and results in the chunk options. Refer to the RMarkdown Reference Guide.

Q9 Display the title and your name correctly at the top of the webpage.

Q10 Use the correct slug.