Student Reviews
                
                    
                            
    
    
    
    
                    
                    ( 5 Of 5 )
                
                1 review
             
         
        
        
     
          
        
            
                
                    Video of Working with date and timestamp in R language in R Programming Language course by Unboxing Big Data channel, video No. 20 free certified online                
            
            
                There are three basic date and time classes: Date, POSIXct and POSIXlt
Class Date handles dates without times. 
Date and POSIXct are internally stored as number of seconds from January 1, 1970.
POSIXlt stores dates and times as a list of components: second, minute, hour, day, month, year, time zone etc.
POSIXct (calendar time) and POSIXlt (local time) represent dates and times.