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ggshadow: Shadow Geoms for ggplot2

:arrow_double_down: Installation

Get the development version from github:

## install.packages("devtools")
devtools::install_github("marcmenem/ggshadow")

:book: Vignette

## after installing the package
vignette("ggshadow", package="ggshadow")

:chart: Example

With ggshadow

library(ggplot2)
library(ggshadow)

ggplot(economics_long, aes(date, value01, colour = variable)) + geom_shadowline()
example with

Without ggshadow

library(ggplot2)

ggplot(economics_long, aes(date, value01, colour = variable)) + geom_line()
example without

ggshadow supports varying the line color

library(ggshadow)
library(ggplot2)

ggplot(economics_long, 
        aes(date, value01, 
            group = variable, 
            colour=value01, 
            shadowcolor='grey', 
            shadowalpha=0.5, 
            shadowsize=5*(1-value01))) + 
    geom_shadowline()
color varying

ggshadow also provides a Neon glow style

```{r fig.height=7, fig.width=7}

ggplot(economics_long, aes(date, value01, color = variable)) + geom_glowline() + guides(color=‘none’) + theme(plot.background = element_rect(fill = “#190132”), panel.background = element_rect(fill = “#190132”))


![glowline](example-glow.png)


### Neon glow points

```{r}

ggplot(mtcars, aes(wt, mpg)) + 
  geom_glowpoint(color='yellow') + 
  guides(color='none') + 
  theme(plot.background = element_rect(fill = "#190132"),
        panel.background = element_rect(fill = "#190132")) 
glowpoint

Adding a fill below the neon glow line

library(dplyr)

ggplot(filter( economics_long, variable %in% c('pop', 'unemploy') ), 
    aes(date, value01-0.5, color = variable, fill=variable)) + 
    geom_glowline() + guides(color='none', shadowcolour='none', fill='none') + 
    theme(plot.background = element_rect(fill = "#190132"),
           panel.background = element_rect(fill = "#190132")) 
glowlinefll

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.