QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, phone numbers, or even coupons. QR codes are found everywhere from ...

How to use dialer codes on your iPhone to view technical data Your email has been sent You may be trying to troubleshoot a problem with your iPhone, or just looking for certain information for your ...

See how to join two data sets by one or more common columns using base R’s merge function, dplyr join functions, and the speedy data.table package. R has a number of quick, elegant ways to join data ...