Dear help list: I am trying to reshape a data frame from long to wide format 
and with a reduced variable list using reshape2.  The original data frame 
format is: Site     Obs_no   LengthSite 1   Obs 1      10Site 1   Obs 2      
13Site 1   Obs 3      14.........Site 2   Obs 1      5Site 2   Obs 2      7Site 
2   Obs 3      9 Site and Obs_no are factors and Length is a numeric variable.  
There are 15 cases in each Site group.  The objective is to rearrange to: Site 
1   Site 210        513        714        9 ........ I have tried a variety of 
approaches, none of which worked.  The following code does not work but 
suggests the task might be possible, perhaps in 2 steps. Df2 <- dcast (Data1, 
Length ~ Site, value_var = "Length")  Its output is: Length   Site 1   Site 210 
           10      NA13            13      NA14            14      NA.......5   
          NA     57             NA     79             NA     9 One easy 
solution is to reshape in Excel and import a new dataframe fo!
 r use but I would like to do it in R.  Any suggestions would be much 
appreciated. Regards,BJ                                     
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