Selects the dark elements from the qr_code
object and returns their
coordinates.
This can be useful when you want to create a QR code with a custom style.
coordinates(x)
the qr_code
object.
A data.frame
with the column
and row
number of the dark
elements.
Other qr:
generate_svg()
,
plot.qr_code()
,
print.qr_code()
,
qr_code()
,
qr_event()
,
qr_wifi()