 
 
I created a couple of timeSeries objects - when I was merging them , I got an 
error.
Looking at the data , I see that one of the time series has
 
06/30/2007  0.0028       0.0183  0.0122      0.0042  0.0095    -         
 07/31/2007 -0.0111       0.0255  0.0096     -0.0069 -0.0024  0.0043      
 08/31/2007 -0.0108      -0.0237 -0.0062     -0.0138 -0.0173 -0.0065      
 09/30/2007  0.0197       0.0477  0.0410      0.0331  0.0114  0.0322      

 
The "-" (first row, last column) is getting picked up from excel and is not a 
number
 
How do I check for this and replace with zero


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