qrcode (version 0.3.0)

plot.qr_code: Plot the QR code This function plots to QR code to the open device.

Description

Plot the QR code This function plots to QR code to the open device.

Usage

# S3 method for qr_code
plot(x, col = c("white", "black"), y, ...)
# S3 method for qr_logo
plot(x, col = c("white", "black"), y, ...)

Arguments

x

the qr_code object

col

Define the colours. The first element refers to FALSE and the second TRUE. Defaults to c("white", "black").

y

currently ignored

...

currently ignored

Author

Thierry Onkelinx

See Also

opencv::ocv_qr_detect() for reading QR codes.

Other qr: coordinates(), generate_svg(), print.qr_code(), qr_code(), qr_event(), qr_location(), qr_sepa(), qr_wifi()

Other qr: coordinates(), generate_svg(), print.qr_code(), qr_code(), qr_event(), qr_location(), qr_sepa(), qr_wifi()

Examples

qr <- qr_code("HELLO WORLD")
plot(qr)

# Test the QR code with the opencv package
if (requireNamespace("opencv")) {
  png("test.png")
  plot(qr)
  dev.off()
  opencv::ocv_qr_detect(opencv::ocv_read('test.png'))
  unlink("test.png")
}