Asynchronous http server graphics device for R.
- SVG over HTTP.
- Automatic resizing.
- HTML live server.
- Plot history.
- Run multiple servers concurrently.
devtools::install_github("nx10/httpgd")Depends on Rcpp, later and gdtools.
SVG rendering (especially font rendering) based on svglite (https://github.com/r-lib/svglite).
Includes cpp-httplib (https://github.com/yhirose/cpp-httplib).
Initialize graphics device and start live server with:
httpgd::httpgd()Plot what ever you want.
x = seq(0, 3 * pi, by = 0.1)
plot(x, sin(x), type = "l")Every plotting library should work.
library(ggplot2)
ggplot(mpg, aes(displ, hwy, colour = class)) +
geom_point()The live server should refresh automatically and detect window size changes.
Stop the server with:
dev.off()| Endpoint | Method | Description |
|---|---|---|
/ |
GET |
Welcome message. |
/live |
GET |
Returns HTML/Javascript live server page. |
/svg |
GET |
Get rendered SVG. |
/state |
GET |
Get current server state. This can be used to check periodically whether a newer SVG can be accessed. |
/resize |
POST |
Trigger graphics device resize. Params are width and height in pixels. |
/next |
POST |
Go to the next plot history page. |
/prev |
POST |
Go to the previous plot history page. |
/clear |
POST |
Clear plot history. |
| Field | Type | Description |
|---|---|---|
upid |
int |
Update id. |
width |
double |
Graphics device width (pixel). |
height |
double |
Graphics device height (pixel). |
recording |
bool |
Whether the graphics device is recording a plot history. |
hsize |
int |
Number of plot history entries. |
hindex |
int |
Index of the displayed plot entry. |
Any advice and suggestions are welcome!
- Use websockets to push changes directly/faster (maybe switch http server backend library).
- Optimization.
It seems like a recent mac OS update (Catalina) removed shared libraries used by the package systemfonts we depend on (see: r-lib/systemfonts#17).
You can install XQuartz as a workaround (https://www.xquartz.org/).