prgm4.quarto

Author

sirisha

Develop a script in R to produce a bar graph displayed the frequency distribution of categorized data in a given data set grouped by a sprcific variable using ggplot2.

Step 1: Load required library

library(ggplot2)

step 2: Load the dataset

data <- mtcars
head(data)

                   mpg cyl disp  hp drat    wt  qsec vs am gear carb
Mazda RX4         21.0   6  160 110 3.90 2.620 16.46  0  1    4    4
Mazda RX4 Wag     21.0   6  160 110 3.90 2.875 17.02  0  1    4    4
Datsun 710        22.8   4  108  93 3.85 2.320 18.61  1  1    4    1
Hornet 4 Drive    21.4   6  258 110 3.08 3.215 19.44  1  0    3    1
Hornet Sportabout 18.7   8  360 175 3.15 3.440 17.02  0  0    3    2
Valiant           18.1   6  225 105 2.76 3.460 20.22  1  0    3    1

step 3: convert numerical data into categorical.

data$cyl <- as.factor(data$cyl)
data$gear <- as.factor(data$gear)

step 4: provide title to dataset.

ggplot(data , aes(x = cyl,fill = gear)) +
geom_bar(Position = "dodge")

Warning in geom_bar(Position = "dodge"): Ignoring unknown parameters:
`Position`

labs (title = "Frequency of cylinders groupede by geartype",
  x = "Number of cylinders",
  y = "Count",
fill = "Gears") +
  theme_minimal()

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