Hi all, 

Again I have searched the net and so on, without finding an answer to this
surely simple problem. A short bit of code would be appreciated. 

  I have a object named `data' with the following column headings.

Date, maxitemp, minitemp, admissions, d.o.w.

Where d.o.w. is day of the week, written "Sun" "Mon" etc.

  I just need to scale the Monday admissions by 0.91, the Saturday
admissions by 1.21 and the Sunday admissions by 1.22. So basically what I
want is:

If d.o.w. == "Sat" 

Multiply Sat admissions by 1.21.

(Now do I need an else statement here, or can I just do another)

If d.o.w. == "Sun" 

Multiply "Sun" admissions by 1.22

(and finally)

If d.o.w. == "Mon" 

Multiply Monday admissions by 0.91. 

Else do nothing. 

  I assume in my code I need to specify that I am using the data.frame
`data', so do I need to write things like 

If(data[d.o.w.]=="Mon")  

  I would then like to round the new admissions to integers (I assume I just
use round(data$admissions)), and output the new data to another csv file. 

  I could of course do this in excel but I will need to extend this type of
idea in the future so I would like to master it in R. 

Many thanks for any help/code.

Robin Williams.  


	[[alternative HTML version deleted]]

