prep/png_jpeg_channels_alpha.R
In petrbouchal/pragr: Tools for visualising Prague data
xxx_png <- png::readPNG("data/osm-tiles/_10_17099_16218.png")
xxx_jpg <- jpeg::readJPEG("data/osm-tiles/_10_17097_16220.jpg")
xxx_jpg %>% dim()
xxx_png %>% dim()
xxx_png[,,4]
grid.draw(rasterGrob(xxx_png[,,3]))
petrbouchal/pragr documentation built on Jan. 9, 2023, 12:09 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
xxx_png <- png::readPNG("data/osm-tiles/_10_17099_16218.png")
xxx_jpg <- jpeg::readJPEG("data/osm-tiles/_10_17097_16220.jpg")
xxx_jpg %>% dim()
xxx_png %>% dim()
xxx_png[,,4]
grid.draw(rasterGrob(xxx_png[,,3]))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.