README.Rmd

---
output: github_document
---

<!-- README.md is generated from README.Rmd. Please edit that file -->

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
  out.width = "100%"
)
```

# piechart

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The goal of piechart is to draw a piechart simply and directly based on 'ggplot2'.

## Installation

You can install piechart from [Github](https://github.com) with:

``` r
## install.packages("devtools")
devtools::install_github("Hy4m/piechart")
```

## Example

This is a basic example which shows you how to solve a common problem:

```{r example}
library(piechart)
## random dataset
set.seed(20210515)
dd <- tibble::tibble(value = rpois(20, 5),
                     label = LETTERS[1:20])

## Ring
piechart(dd, aes(value = value, label = label)) +
  geom_pie(aes(fill = label), show.legend = FALSE) +
  geom_pie_text()

## Pie
piechart(dd, aes(value = value, label = label), r0 = 0) +
  geom_pie(aes(fill = label), show.legend = FALSE) +
  geom_pie_text(facing = "clockwise", position = "top-inside")

## sunburst
piechart(dd, aes(r1 = value, label = label), value = 1, r0 = 0.5) +
  geom_pie(aes(fill = label), show.legend = FALSE) +
  geom_pie_text(facing = "clockwise", position = "top-inside")

piechart(dd, aes(r1 = value, label = label), value = 1, r0 = 0.5,
         sort_by = "value") +
    geom_pie(aes(fill = value), show.legend = FALSE) +
    geom_pie_text(facing = "clockwise", position = "top-inside") +
    ggplot2::scale_fill_viridis_c()


## arc heatmap
library(magrittr)
as.matrix(iris[-5]) %>% 
  as_piechart_data(start = 80, end = 100, r0 = 0.8) %>% 
  piechart(xlim = c(-1.2, 1.2), ylim = c(-1.2, 1.2)) +
  geom_pie(aes(fill = value), colour = "white", size = 0.3) +
  geom_rtext(position = "top-outside", size = 2.5) +
  geom_ctext(hjust = "middle", size = 2.5) +
  ggplot2::scale_fill_viridis_c()
```