The following PHP code includes a simple class that can manipulate dates, such as date subtraction, adding days and subtracting days to the current date. It is very useful because my PHP server does not support the latest DateTime function yet. <?php class Dt { private $day; private $month; private $year; private $seconds=86400; function __construct() [...]
Data is king in statistical analysis. Here provide several examples related to data input, manipulation, and merging. Read data from a file When using SAS, you will alsways want to read data from a existing data file. This will simplify the copy data around and waste the disk space, share a same set of data [...]