inst/doc/vignette.R

In glow: Make Plots that Glow

## ---- setup, echo=FALSE-------------------------------------------------------
IS_GITHUB <- Sys.getenv("IS_GITHUB") != ""

## ----results='asis', echo=FALSE, eval=IS_GITHUB-------------------------------
#  cat('
#  [![R-CMD-check](https://github.com/traversc/glow/workflows/R-CMD-check/badge.svg)](https://github.com/traversc/glow/actions)
#  [![CRAN-Status-Badge](http://www.r-pkg.org/badges/version/glow)](https://cran.r-project.org/package=glow)
#  [![CRAN-Downloads-Badge](https://cranlogs.r-pkg.org/badges/glow)](https://cran.r-project.org/package=glow)
#  [![CRAN-Downloads-Total-Badge](https://cranlogs.r-pkg.org/badges/grand-total/glow)](https://cran.r-project.org/package=glow)
#  ')

## ----results='asis', echo=FALSE-----------------------------------------------
output <- '
<center>
|Methylation 450K Volcano Plot |Diamonds |
|-|-|
|![](vignettes/volcano_white_bg.png "volcano_white_bg.png"){height=240px} |![](vignettes/diamonds.png "diamonds.png"){height=240px} |

| Milky Way Galaxy (6.1 million stars) |
|-|
| ![](vignettes/GAIA_galaxy_pseudocolor.png "GAIA_galaxy_pseudocolor.png"){height=300px} |

| OpenStreetMap GPS traces (2.8 billion points) |
|-|
| ![](vignettes/gps_trace_8K.png "gps_trace_8K.png"){height=300px} |

| Clifford strange attractor (1 billion points) |
|-|
| ![](vignettes/clifford_distance_inverse_viridis_50.png "clifford_distance_inverse_viridis_50.png"){height=300px} |

| Airline Dataset (145 million points) | Glow-y Spiral |
|-|-|
| ![](vignettes/airline_mt.png "airline_mt.png"){height=240px} | ![](vignettes/glow_spiral2.png "glow_spiral2.png"){height=240px} |

| U.S. Coronavirus Cases (2021) |
|-|
| ![](vignettes/US_coronavirus_2021.png "US_coronavirus_2021.png"){height=300px} |

</center>
'

if(IS_GITHUB) {
  cat(output)
} else {
  cat(gsub("vignettes/", "", output))
}

## ----eval=FALSE---------------------------------------------------------------
#  remotes::install_github("traversc/glow")

## ----eval=FALSE---------------------------------------------------------------
#  library(glow)
#  library(ggplot2)
#  library(viridisLite) # Magma color scale
#  
#  # Number of threads
#  nt <- 4
#  
#  data(diamonds)
#  gm <- GlowMapper$new(xdim=800, ydim = 640, blend_mode = "screen", nthreads=nt)
#  gm$map(x=diamonds$carat, y=diamonds$price, intensity=1, radius = .1)
#  pd <- gm$output_dataframe(saturation = 1)
#  
#  # Dark color theme
#  ggplot() +
#    geom_raster(data = pd, aes(x = pd$x, y = pd$y, fill = pd$value), show.legend = FALSE) +
#    scale_fill_gradientn(colors = additive_alpha(magma(12))) +
#    coord_fixed(gm$aspect(), xlim = gm$xlim(), ylim = gm$ylim()) +
#    labs(x = "carat", y = "price") +
#    theme_night(bgcolor = magma(12)[1])

## ----results='asis', echo=FALSE-----------------------------------------------
if(IS_GITHUB) {
  cat('![](vignettes/diamonds_vignette_dark.png "diamonds_vignette_dark.png"){height=240px}')
} else {
  cat('![](diamonds_vignette_dark.png "diamonds_vignette_dark.png"){height=240px}')
}

## ----eval=FALSE---------------------------------------------------------------
#  # light color theme
#  light_colors <- light_heat_colors(144)
#  ggplot() +
#    geom_raster(data = pd, aes(x = pd$x, y = pd$y, fill = pd$value), show.legend = FALSE) +
#    scale_fill_gradientn(colors = additive_alpha(light_colors)) +
#    coord_fixed(gm$aspect(), xlim = gm$xlim(), ylim = gm$ylim()) +
#    labs(x = "carat", y = "price") +
#    theme_bw(base_size = 14)

## ----results='asis', echo=FALSE-----------------------------------------------
if(IS_GITHUB) {
  cat('![](vignettes/diamonds_vignette_light.png "diamonds_vignette_light.png"){height=240px}')
} else {
  cat('![](diamonds_vignette_light.png "diamonds_vignette_light.png"){height=240px}')
}

## ----eval=FALSE---------------------------------------------------------------
#  library(EBImage)
#  
#  # Generate data
#  cliff_points <- clifford_attractor(1e6, 1.886,-2.357,-0.328, 0.918, 0.1, 0)
#  color_pal <- circular_palette(n=144, pal_function=rainbow)
#  cliff_points$color <- map_colors(color_pal, cliff_points$angle, min_limit=-pi, max_limit=pi)
#  
#  # Create raster
#  gm <- GlowMapper4$new(xdim=480, ydim = 270, blend_mode = "additive", nthreads=4)
#  gm$map(x=cliff_points$x, y=cliff_points$y, radius=0.05, color=cliff_points$color)
#  pd <- gm$output_raw(saturation = 1)
#  
#  # Output raster with EBImage
#  image_array <- array(1, dim=c(480, 270, 3))
#  image_array[,,1] <- pd[[1]]*pd[[4]]
#  image_array[,,2] <- pd[[2]]*pd[[4]]
#  image_array[,,3] <- pd[[3]]*pd[[4]]
#  img <- EBImage::Image(image_array, colormode='Color')
#  plot(img)
#  writeImage(img, "plots/clifford_vignette.png")

## ----results='asis', echo=FALSE-----------------------------------------------
if(IS_GITHUB) {
  cat('![](vignettes/clifford_vignette.png "clifford_vignette.png"){height=240px}')
} else {
  cat('![](clifford_vignette.png "clifford_vignette.png"){height=240px}')
}