search for: wdindex

...presenting wether the day is a working day (I use 'Wd' for short here)or weekend (I use 'Wkend' for short here). I want to seperate the index of the working days and weekends for each season. I used R commend "which" before for one criteria, for example, if I use... WdIndex<-which(Calender$Day=='Wd') that will gives a set of indeices of working days in the year. I wonder in R could I use a combination of something such as 'AND' , 'OR' (e.g. in MySQL) to set 'multi-criteria' when selecting data. So for example... WinterWdIndex<...