# Pie Charts - R Base Graphs

Previously, we described the essentials of R programming and provided quick start guides for importing data into **R**.

**pie charts**in R. The R base function

**pie**() can be used for this.

# Pleleminary tasks

**Launch RStudio**as described here: Running RStudio and setting up your working directory**Prepare your data**as described here: Best practices for preparing your data and save it in an external .txt tab or .csv files**Import your data**into**R**as described here: Fast reading of data from txt|csv files into R: readr package.

# Create some data

```
df <- data.frame(
group = c("Male", "Female", "Child"),
value = c(25, 25, 50)
)
df
```

```
## group value
## 1 Male 25
## 2 Female 25
## 3 Child 50
```

# Create basic pie charts: pie()

The function **pie**() can be used to draw a **pie chart**.

`pie(x, labels = names(x), radius = 0.8)`

**x**: a vector of non-negative numerical quantities. The values in x are displayed as the areas of pie slices.**labels**: character strings giving names for the slices.**radius**: radius of the pie circle. If the character strings labeling the slices are long it may be necessary to use a smaller radius.

`pie(df$value, labels = df$group, radius = 1)`

```
# Change colors
pie(df$value, labels = df$group, radius = 1,
col = c("#999999", "#E69F00", "#56B4E9"))
```

# Create 3D pie charts: plotix::pie3D()

Te function **pie3D**()[in **plotrix** package] can be used to draw a 3D pie chart.

**Install** plotrix package:

`install.packages("plotrix")`

Use **pie3D**():

```
# 3D pie chart
library("plotrix")
pie3D(df$value, labels = df$group, radius = 1.5,
col = c("#999999", "#E69F00", "#56B4E9"))
```

```
# Explode the pie chart
pie3D(df$value, labels = df$group, radius = 1.5,
col = c("#999999", "#E69F00", "#56B4E9"),
explode = 0.1)
```

# See also

# Infos

This analysis has been performed using **R statistical software** (ver. 3.2.4).

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