Add shield

Author: showteeth

README.md

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 -   `ggrosepie`: Create rose pie plot with single or two group variables.
 
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 ## Installation
 
 You can install the released version of `ggpie` from [CRAN](https://CRAN.R-project.org) with:
@@ -33,6 +34,7 @@ remotes::install_github("showteeth/ggpie")
 ```
 
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 ## Usage
 
 ### Preapre data
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 ```
 
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 ### Pie plot
 
 #### no label
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 <img src="man/figures/README-pie_threashold_horizon_in-1.png" width="100%" />
 
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 ### Donut plot
 
 #### no label
@@ -237,6 +241,7 @@ ggdonut(data = diamonds, group_key = "cut", count_type = "full",
 <img src="man/figures/README-donut_threashold_horizon_in_no_split-1.png" width="100%" />
 
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 ### 3D pie plot
 
 ``` r
@@ -264,6 +269,7 @@ cowplot::plot_grid(p1,p2,p3,p4,ncol = 2)
 <img src="man/figures/README-pie3d-1.png" width="100%" />
 
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 ### Nested pie/donut plot
 
 It is often the case that we have **two categorical variables** and then need to plot for both of them, `ggnestedpie` is designed to deal with this.
@@ -345,6 +351,7 @@ ggnestedpie(data = diamonds, group_key = c("cut", "color"), count_type = "full",
 <img src="man/figures/README-nested_pie_blank_inner_outer-1.png" width="100%" />
 
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 ### Rose pie/donut plot
 
 #### single variable
@@ -442,6 +449,7 @@ cowplot::plot_grid(p1,p2)
 <img src="man/figures/README-rose_pie_two_with_tick_specific_break-1.png" width="100%" />
 
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 ## Contributing
 
 Please note that the `ggpie` project is released with a [Contributor Code of Conduct](https://www.contributor-covenant.org/version/1/0/0/code-of-conduct/). By contributing to this project, you agree to abide by its terms.