See V.
| 1 | VCR(tofactor = 0, keepblank = 0, sep = "\t")
 | 
| tofactor | if this is equal to numeric 1 or  | 
| keepblank | if characters are not to be converted to factors, this argument decides how to deal with 
blank cells in character columns. If it is numeric 1 or  | 
| sep | a single character to differentiate cells of a table. The default value should be used when your data is from Excel. | 
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