Steps 1-6

Load the R packaged we will use.

library(tidyverse)
library(echarts4r)  #install this package before using
library(hrbrthemes) #install this package before using

read the data in the files, drug_cos.csv, health_cos.csv in to R and assign to the variables drug_cos and health_cos, respectively

drug_cos  <- read_csv("https://estanny.com/static/week6/drug_cos.csv")
health_cos  <- read_csv("https://estanny.com/static/week6/health_cos.csv")

Use glimpse to get a glimpse of the data

drug_cos %>% glimpse()

Rows: 104
Columns: 9
$ ticker       <chr> "ZTS", "ZTS", "ZTS", "ZTS", "ZTS", "ZTS", "ZTS…
$ name         <chr> "Zoetis Inc", "Zoetis Inc", "Zoetis Inc", "Zoe…
$ location     <chr> "New Jersey; U.S.A", "New Jersey; U.S.A", "New…
$ ebitdamargin <dbl> 0.149, 0.217, 0.222, 0.238, 0.182, 0.335, 0.36…
$ grossmargin  <dbl> 0.610, 0.640, 0.634, 0.641, 0.635, 0.659, 0.66…
$ netmargin    <dbl> 0.058, 0.101, 0.111, 0.122, 0.071, 0.168, 0.16…
$ ros          <dbl> 0.101, 0.171, 0.176, 0.195, 0.140, 0.286, 0.32…
$ roe          <dbl> 0.069, 0.113, 0.612, 0.465, 0.285, 0.587, 0.48…
$ year         <dbl> 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018…

health_cos %>% glimpse()

Rows: 464
Columns: 11
$ ticker      <chr> "ZTS", "ZTS", "ZTS", "ZTS", "ZTS", "ZTS", "ZTS"…
$ name        <chr> "Zoetis Inc", "Zoetis Inc", "Zoetis Inc", "Zoet…
$ revenue     <dbl> 4233000000, 4336000000, 4561000000, 4785000000,…
$ gp          <dbl> 2581000000, 2773000000, 2892000000, 3068000000,…
$ rnd         <dbl> 427000000, 409000000, 399000000, 396000000, 364…
$ netincome   <dbl> 245000000, 436000000, 504000000, 583000000, 339…
$ assets      <dbl> 5711000000, 6262000000, 6558000000, 6588000000,…
$ liabilities <dbl> 1975000000, 2221000000, 5596000000, 5251000000,…
$ marketcap   <dbl> NA, NA, 16345223371, 21572007994, 23860348635, …
$ year        <dbl> 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018,…
$ industry    <chr> "Drug Manufacturers - Specialty & Generic", "Dr…

Which variables are the same in both data sets

names_drug  <- drug_cos %>% names()
names_health  <- health_cos %>% names()
intersect(names_drug, names_health)

[1] "ticker" "name"   "year"

Select subsets of varibales to work with

For drug_cos select (in this order) ticker, year, grossmargin
- Extract observations for 2018
- Assign output to drug_subset
For health_cos select (in this order) ticker, year, revenue, gp, industry
- Extract observatons for 2018
- Assign output to health_subset

drug_subset  <- drug_cos %>%
  select(ticker, year, grossmargin) %>% 
  filter(year == 2018)

health_subset  <- health_cos %>%
  select(ticker, year, revenue, gp, industry) %>% 
  filter(year == 2018)

Keep all the rows and columns drug_subset join with columns in health_subset

drug_subset %>% left_join(health_subset)

# A tibble: 13 x 6
   ticker  year grossmargin   revenue        gp industry              
   <chr>  <dbl>       <dbl>     <dbl>     <dbl> <chr>                 
 1 ZTS     2018       0.672   5.82e 9   3.91e 9 Drug Manufacturers - …
 2 PRGO    2018       0.387   4.73e 9   1.83e 9 Drug Manufacturers - …
 3 PFE     2018       0.79    5.36e10   4.24e10 Drug Manufacturers - …
 4 MYL     2018       0.35    1.14e10   4.00e 9 Drug Manufacturers - …
 5 MRK     2018       0.681   4.23e10   2.88e10 Drug Manufacturers - …
 6 LLY     2018       0.738   2.46e10   1.81e10 Drug Manufacturers - …
 7 JNJ     2018       0.668   8.16e10   5.45e10 Drug Manufacturers - …
 8 GILD    2018       0.781   2.21e10   1.73e10 Drug Manufacturers - …
 9 BMY     2018       0.71    2.26e10   1.60e10 Drug Manufacturers - …
10 BIIB    2018       0.865   1.35e10   1.16e10 Drug Manufacturers - …
11 AMGN    2018       0.827   2.37e10   1.96e10 Drug Manufacturers - …
12 AGN     2018       0.861   1.58e10   1.36e10 Drug Manufacturers - …
13 ABBV    2018       0.764   3.28e10   2.50e10 Drug Manufacturers - …

Question: join_ticker

Start with drug_cos
Extract observations for the ticker MRK from drug_cos
Assign output to the variable drug_cos_subset

drug_cos_subset <-  drug_cos %>% 
  filter(ticker == "MRK")

Display drug_cos_subset

drug_cos_subset

# A tibble: 8 x 9
  ticker name  location ebitdamargin grossmargin netmargin   ros   roe
  <chr>  <chr> <chr>           <dbl>       <dbl>     <dbl> <dbl> <dbl>
1 MRK    Merc… New Jer…        0.305       0.649     0.131 0.15  0.114
2 MRK    Merc… New Jer…        0.33        0.652     0.13  0.182 0.113
3 MRK    Merc… New Jer…        0.282       0.615     0.1   0.123 0.089
4 MRK    Merc… New Jer…        0.567       0.603     0.282 0.409 0.248
5 MRK    Merc… New Jer…        0.298       0.622     0.112 0.136 0.096
6 MRK    Merc… New Jer…        0.254       0.648     0.098 0.117 0.092
7 MRK    Merc… New Jer…        0.278       0.678     0.06  0.162 0.063
8 MRK    Merc… New Jer…        0.313       0.681     0.147 0.206 0.199
# … with 1 more variable: year <dbl>

*Use left_join to combine the rows and columns of drug_cos_subset with the columns of health_cos

Assign the output to combo_df

combo_df <- drug_cos_subset %>% 
  left_join(health_cos)

Display combo_df

combo_df

# A tibble: 8 x 17
  ticker name  location ebitdamargin grossmargin netmargin   ros   roe
  <chr>  <chr> <chr>           <dbl>       <dbl>     <dbl> <dbl> <dbl>
1 MRK    Merc… New Jer…        0.305       0.649     0.131 0.15  0.114
2 MRK    Merc… New Jer…        0.33        0.652     0.13  0.182 0.113
3 MRK    Merc… New Jer…        0.282       0.615     0.1   0.123 0.089
4 MRK    Merc… New Jer…        0.567       0.603     0.282 0.409 0.248
5 MRK    Merc… New Jer…        0.298       0.622     0.112 0.136 0.096
6 MRK    Merc… New Jer…        0.254       0.648     0.098 0.117 0.092
7 MRK    Merc… New Jer…        0.278       0.678     0.06  0.162 0.063
8 MRK    Merc… New Jer…        0.313       0.681     0.147 0.206 0.199
# … with 9 more variables: year <dbl>, revenue <dbl>, gp <dbl>,
#   rnd <dbl>, netincome <dbl>, assets <dbl>, liabilities <dbl>,
#   marketcap <dbl>, industry <chr>

Note: the variables ticker, name, location, are the same for all the observations

Assign the company name to co_name

co_name <- combo_df %>% 
  distinct(name) %>% 
  pull()

Assign the company name to co_location

co_location <- combo_df %>% 
  distinct(location) %>% 
  pull()

Assign the company name to co_industry

co_industry <- combo_df %>% 
  distinct(industry) %>% 
  pull()

Put the r inline commands used in the blanks below. When you knit the document the results of the commands will be displayed in your text.

The company Merck & Co Inc is located in New Jersey; U.S.A and is a member of the Drug Manufacturers - General industry group.

Start with combo_df
Select variables (in this order): year, grossmargin, netmargin, revenue, gp, netincome
Assign the output to combo_df_subset

combo_df_subset  <- combo_df %>% 
  select(year, grossmargin, netmargin, revenue, gp, netincome)

Display combo_df_subset

combo_df_subset

# A tibble: 8 x 6
   year grossmargin netmargin     revenue          gp   netincome
  <dbl>       <dbl>     <dbl>       <dbl>       <dbl>       <dbl>
1  2011       0.649     0.131 48047000000 31176000000  6272000000
2  2012       0.652     0.13  47267000000 30821000000  6168000000
3  2013       0.615     0.1   44033000000 27079000000  4404000000
4  2014       0.603     0.282 42237000000 25469000000 11920000000
5  2015       0.622     0.112 39498000000 24564000000  4442000000
6  2016       0.648     0.098 39807000000 25777000000  3920000000
7  2017       0.678     0.06  40122000000 27210000000  2394000000
8  2018       0.681     0.147 42294000000 28785000000  6220000000

Create the variable grossmargin_check to compare with the variable gross_margin. They should be equal.
- grossmargin_check = gp / revenue
Create the variable close_enough to check that the absolute value of the difference between grossmargin_check and grossmargin is less than 0.001

combo_df_subset %>% 
  mutate(grossmargin_check = gp / revenue,
  close_enough = abs(grossmargin_check - grossmargin) < 0.001)

# A tibble: 8 x 8
   year grossmargin netmargin revenue      gp netincome
  <dbl>       <dbl>     <dbl>   <dbl>   <dbl>     <dbl>
1  2011       0.649     0.131 4.80e10 3.12e10   6.27e 9
2  2012       0.652     0.13  4.73e10 3.08e10   6.17e 9
3  2013       0.615     0.1   4.40e10 2.71e10   4.40e 9
4  2014       0.603     0.282 4.22e10 2.55e10   1.19e10
5  2015       0.622     0.112 3.95e10 2.46e10   4.44e 9
6  2016       0.648     0.098 3.98e10 2.58e10   3.92e 9
7  2017       0.678     0.06  4.01e10 2.72e10   2.39e 9
8  2018       0.681     0.147 4.23e10 2.88e10   6.22e 9
# … with 2 more variables: grossmargin_check <dbl>,
#   close_enough <lgl>

Create the variable netmargin_check to compare with the variable net_margin. They should be equal.
Create the variable close_check to check that the absolute value of the difference between netmargin_check and netmargin is less than 0.001

combo_df_subset %>% 
  mutate(netmargin_check = netincome / revenue,
  close_enough = abs(netmargin_check - netmargin) < 0.001)

# A tibble: 8 x 8
   year grossmargin netmargin revenue      gp netincome
  <dbl>       <dbl>     <dbl>   <dbl>   <dbl>     <dbl>
1  2011       0.649     0.131 4.80e10 3.12e10   6.27e 9
2  2012       0.652     0.13  4.73e10 3.08e10   6.17e 9
3  2013       0.615     0.1   4.40e10 2.71e10   4.40e 9
4  2014       0.603     0.282 4.22e10 2.55e10   1.19e10
5  2015       0.622     0.112 3.95e10 2.46e10   4.44e 9
6  2016       0.648     0.098 3.98e10 2.58e10   3.92e 9
7  2017       0.678     0.06  4.01e10 2.72e10   2.39e 9
8  2018       0.681     0.147 4.23e10 2.88e10   6.22e 9
# … with 2 more variables: netmargin_check <dbl>, close_enough <lgl>

combo_df_subset %>% mutate(grossmargin_check = gp / revenue, close_enough = abs(grossmargin_check - grossmargin) < 0.001)

Question: summerize_industry

Fill in the blanks
Put the command you use in the Rchunks in the Rmd file for this quiz
Use the health_cos data
For each industry calculate
- mean_netmargin_percent = mean(netincome / revenue) * 100
- median_netmargin_percent = median(netincome / revenue) * 100
- min_netmargin_percent = min(netincome / revenue) * 100
- max_netmargin_percent = max(netincome / revenue) * 100

health_cos %>% 
  group_by(industry) %>% 
  summarize(mean_netmargin_percent = mean(netincome / revenue) * 100,
            median_netmargin_percent = median(netincome / revenue) * 100,
            min_netmargin_percent  = min(netincome / revenue) * 100,
            max_netmargin_percent = max(netincome / revenue) * 100)

# A tibble: 9 x 5
  industry mean_netmargin_… median_netmargi… min_netmargin_p…
* <chr>               <dbl>            <dbl>            <dbl>
1 Biotech…            -4.66             7.62         -197.   
2 Diagnos…            13.1             12.3             0.399
3 Drug Ma…            19.4             19.5           -34.9  
4 Drug Ma…             5.88             9.01          -76.0  
5 Healthc…             3.28             3.37           -0.305
6 Medical…             6.10             6.46            1.40 
7 Medical…            12.4             14.3           -56.1  
8 Medical…             1.70             1.03           -0.102
9 Medical…            12.3             14.0           -47.1  
# … with 1 more variable: max_netmargin_percent <dbl>

mean_netmargin_percent for the industry Diagnostics & Research is 13.1%
median_netmargin_percent for the industry Diagnostics & Research is 12.3%
min_netmargin_percent for the industry Diagnostics & Research is 0.4%
max_netmargin_percent for the industry Diagnostics & Research is 26.3%

Question: inline_ticker

Fill in the blanks
Use the health_cos data
Extract observations for the ticker ZTS from health_cos and assign to the variable health_cos_subset

health_cos_subset  <- health_cos %>% 
  filter(ticker == "ZTS")

Display health_cos_subset

health_cos_subset

# A tibble: 8 x 11
  ticker name  revenue     gp    rnd netincome  assets liabilities
  <chr>  <chr>   <dbl>  <dbl>  <dbl>     <dbl>   <dbl>       <dbl>
1 ZTS    Zoet…  4.23e9 2.58e9 4.27e8    2.45e8 5.71e 9  1975000000
2 ZTS    Zoet…  4.34e9 2.77e9 4.09e8    4.36e8 6.26e 9  2221000000
3 ZTS    Zoet…  4.56e9 2.89e9 3.99e8    5.04e8 6.56e 9  5596000000
4 ZTS    Zoet…  4.78e9 3.07e9 3.96e8    5.83e8 6.59e 9  5251000000
5 ZTS    Zoet…  4.76e9 3.03e9 3.64e8    3.39e8 7.91e 9  6822000000
6 ZTS    Zoet…  4.89e9 3.22e9 3.76e8    8.21e8 7.65e 9  6150000000
7 ZTS    Zoet…  5.31e9 3.53e9 3.82e8    8.64e8 8.59e 9  6800000000
8 ZTS    Zoet…  5.82e9 3.91e9 4.32e8    1.43e9 1.08e10  8592000000
# … with 3 more variables: marketcap <dbl>, year <dbl>,
#   industry <chr>

In the console, type ?distinct. Go to the help pane to see what distinct does
In the console, type ?pull. Go to the help pane to see what pull does

Run the code below

health_cos_subset  %>% 
  distinct(name) %>%  
  pull(name)

[1] "Zoetis Inc"

Assign the output to co_name

co_name  <- health_cos_subset  %>% 
  distinct(name) %>%  
  pull(name)

You can take output from your code and include it in your text.

The name of the company with ticker ZTS is Zoetis Inc

In following chuck

Assign the company’s industry group to the variable co_industry

co_industry <- health_cos_subset  %>% 
  distinct(industry) %>%  
  pull()

This is outside the Rchunck. Put the r inline commands used in the blanks below. When you knit the document the results of the commands will be displayed in your text.

The company Zoetis Inc is a member of the Drug Manufacturers - Specialty & Generic group.

Steps 7-11

Prepare data for the plots

start with health_cos THEN
group by industry THEN
calculate the median and development expenditure by industry
assign the output to df

df  <- health_cos %>% 
  group_by(industry) %>% 
  summarize(med_rnd_rev = median(rnd/revenue))

Use glimpse to glimpse the data for the plots

df  %>% glimpse()

Rows: 9
Columns: 2
$ industry    <chr> "Biotechnology", "Diagnostics & Research", "Dru…
$ med_rnd_rev <dbl> 0.48317287, 0.05620271, 0.17451442, 0.06851879,…

9 Create a static bar chart

use ggplot to initialize the chart
data is df
the variable industry is mapped to the x-axis - reorder it based on the value of med_rnd_rev
the variable med_rnd_rev is mapped to the y-axis
add a bar chart using geom_col
use scale_y_continuous to label the y-axis with percent
use coord_flip() to flip the coordinates
use labs to add title, subtitle and remove x and y-axis
use theme_ipsum() from the hrbrthemes package to improve the theme

ggplot(data = df, 
       mapping = aes(
          x = reorder(industry, med_rnd_rev ),
          y = med_rnd_rev
          )) +
  geom_col() +
  scale_y_continuous(labels = scales::percent) +
  coord_flip() +
  labs(
    title = "Median R&D expenditures",
    subtitle = "by industry as a percent of revenue from 2011 to 2018",
    x = NULL, y = NULL) +
  theme_ipsum()

Save the last plot to preview.png and add to the yaml chunk at the top

ggsave(filename = "preview.png", 
       path = here::here("_posts", "2021-03-08-joining-data"))

Create an interactive bar chart using the package echarts4r

start with the data df
use arrange to reorder med_rnd_rev
use e_charts to initialize a chart - the variable industry is mapped to the x-axis
add a bar chart using e_bar with the values of med_rnd_rev
use e_flip_coords() to flip the coordinates
use e_title to add the title and the subtitle
use e_legend to remove the legends
use e_x_axis to change format of labels on x-axis to percent
use e_y_axis to remove labels on y-axis
use e_theme to change the theme. Find more themes here

df %>% 
  arrange(med_rnd_rev) %>% 
  e_charts(
    x = industry,
    ) %>% 
  e_bar(
    serie = med_rnd_rev,
    name = "median"
    ) %>% 
  e_flip_coords() %>% 
  e_tooltip() %>% 
  e_title(
    text = "Median industry R&D expenditures", 
    subtext = "by industry as a percent of revenue from 2011 to 2018",
    left = "center") %>% 
  e_legend(FALSE) %>% 
  e_x_axis(
    formatter = e_axis_formatter("percent", digits = 0)
    ) %>% 
  e_y_axis(
    show = FALSE
  ) %>% 
  e_theme("infographic")

Joining data

Steps 1-6

Question: join_ticker

Question: summerize_industry

Question: inline_ticker

Steps 7-11