Dear all,

This relatively routine analysis has left me frustrated and in a rut.  I
have a dataset (data1), which I subset in order to remove rows where
HabitatDensity="Med".  This dataset looks correct when I call it up,
however, when I create a table out of the new subset (data2), my table
continues to show the "Med" information as 0.  

This is a problem because I need a 2x2xK structure for my analysis and
the fourfoldplot routine, and therefore wish to eliminate data where
HabitatDensity="Med".  

Simple question (and probably simple answer):  How can I delete the
HabitatDensity=="Med" from the dataset or table, so that I be left with
a 2x2xK table.

Thanks for any assistance.

Kind regards,

Scott

 

> data1

							
	Habitat

HabitatDensity

Sex

				
	Grass

High

Male

				
	Grass

High

Female

				
	Grass

Med

Male

				
	Grass

Med

Female

				
	Grass

Low

Male

				
	Grass

Low

Female

				
	Rock

High

Male

				
	Rock

High

Female

				
	Rock

Med

Male

				
	Rock

Med

Female

				
	Rock

Low

Male

				
	Rock

Low

Female

				
	Water

High

Male

				
	Water

High

Male

				
	Water

High

Female

				
	Water

Low

Female

				
	...

						
								
> data2 <- subset(data1, HabitatDensity=="Low"|HabitatDensity=="High",
drop=TRUE)

>data2

							
	Habitat

HabitatDensity

Sex

				
	Grass

High

Male

				
	Grass

High

Female

				
	Grass

Low

Male

				
	Grass

Low

Female

				
	Rock

High

Male

				
	Rock

High

Female

				
	Rock

Low

Male

				
	Rock

Low

Female

				
	Water

High

Male

				
	Water

High

Male

				
	Water

High

Female

				
	Water

Low

Female

				
	...

						
								
>table1<-table(data2$Sex, data2$Habitat, data2$HabitatDensity)

		
>table1 

							
	,,= Grass

						
		High

Low

Med

			
	Female

2

2

0

			
	Male

3

2

0

			
								
								
	,,= Rock

						
		High

Low

Med

			
	Female

4

1

0

			
	Male

2

1

0

			
								
								
	,,= Water

						
		High

Low

Med

			
	Female

5

2

0

			
	Male

3

1

0

			
								

 


	[[alternative HTML version deleted]]

