[R] How to create a numeric data.frame

[Aparna]

Hi Sarah

Thanks for your advice. My dataset contains all the normalized values. I have to 
give this dataset as input to ClusterCons package in R. In order to run the 
package, it requires the data to be converted to numeric data.frame. 

When i check my data using class(mydataset), it is in the form of data.frame. 
But when I try to convert it to numeric using as.numeric(mydataset), it gives me 
an error saying 

Error: (list) object cannot be coerced to type 'double'. 
Could you tell me why this error occurs. 

Thanks
Aparna