You need to understand that the R interpreter does not have an interactive plot device when run as a script from an OS command line. You need to open an output device, `print` the output of the ggplot call, and then  _after_ closing the device appropriately, open the output in an appropriate viewer supplied by your unstated OS.

?Devices # brings up a list of possible devices and has a "See Also" section that says:

===========================

The individual help files for further information on any of the devices listed here;

on Windows:
windows.options,

on a Unix-alike:
X11.options, quartz.options,

ps.options and pdf.options for how to customize devices.

dev.interactive, dev.cur, dev.print, graphics.off, image, dev2bitmap.

On Unix-alikes only:
capabilities to see if X11, jpeg, png, tiff, quartz and the cairo-based devices are available.
==============================


So do some further reading to educate yourself.


--

David.

On 1/24/20 8:32 AM, Felix Blind wrote:
Dear R users,

i am a python user trying to get my statistical knowledge up to speed
and R is the language for that.
I would like to run R scripts like that: R -f script.r and still get the
plots that pop up.

When I type the following code in the R REPL I get a nice plot:

library(ggplot2)

data("midwest",
package="ggplot2")

ggplot(midwest, aes(x=area, y=poptotal)) + geom_point()

But when I put the same code in a file script.r and run it with R -f
script.r or if I source it in the REPL with source("script.r") I do not
get any plots shown.

Can you guys tell me what I do wrong. (Apart from either using RStudio
or the REPL exclusively)

Kind regards,
Felix

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