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

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

Usage

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

# S3 method for class '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

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()

Author

Thierry Onkelinx

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")
}
#> Loading required namespace: opencv