[R] Discrete and Continuous variables

[acos at dpi.inpe.br]

Hello everybody!

I have a data frame with discrete and continuous variables something  
like this:

0	1	1.46270716	5309.0171	912.5704	1000.0000
1	0	1.55237329	5559.0171	809.0170	1000.0000
0	1	1.19595444	5809.0171	750.0000	1000.0000
2	2	0.96467876	6059.0171	707.1068	1000.0000
1	0	1.46927392	3250.0000	559.0170	750.0000
2	0	1.65267885	3500.0000	707.1068	750.0000


Discrete variables should be specified as factor >as.factor() and  
continuos variables as numeric >as.numeric().
The problem is:
The users that will enter with the variables. Is it possible identify  
which input variable are continuous or discrete?

Thank guys!