Package index • qrcode

Generate QR code

All the relevant functions for generating and displaying the QR code.

qr_code(): Generate the QR code

generate_svg(): Generate the QR code as an svg file

plot(<qr_code>) plot(<qr_logo>): Plot the QR code This function plots to QR code to the open device.

print(<qr_code>): Print the qr_code object

qr_vcard(): Create a QR code for a vCard

qr_event(): Generate a QR code for an event

qr_wifi(): Generate QR code with wifi login information

qr_sepa(): Generate a QR code for a SEPA payment

qr_location(): Create a QR code for a location

add_logo(): Add a logo to a QR code

coordinates(): Extract coordinates from a QR code object.

Internal functions

Functions used internally by qr_code().

qr_encode(): Create the bit encoding

qr_error(): Create the message and error code bit string

qr_matrix(): Prepare matrices with default patterns and unmasked data A list with a matrix containing the default patterns (finder pattern, timing pattern, separators, alignment pattern and dark module), the unmask data pattern and the version.

qr_mode(): Determine the required mode

qr_version(): Determine the required version Returns a list with the version, error correction level and mode. The bit string encodes mode and the length of the input string.

The bits S3 class

The bits class is a logical vector displayed as a string of 0 and 1.

as.character(<bits>): Convert a bits object into a character string

bits(): Create a bits object

bits2int() int2bits(): Convert a bits object to an integer and vice versa

c(<bits>): Combine bits

print(<bits>): Print a bits vector Display the logical vector as a bit string where FALSE is shown as 0 and TRUE as 1.