[R] get the first row ?

[Ragia Ibrahim]

Dear group
kindly

I have a logical data type 
ISINFCluster:
    1     2     3     4     5     6     7     8     9    10    11    12    13    14 
FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE 
   15    16    17    18    19    20    21    22    23    24    25    26    27    28 
FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE  TRUE FALSE 
   29    30    31    32    33    34    35    36    37    38    39    40    41    42 
FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE 
   43    44    45    46    47    48    49    50 
FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE 

and I want to get just number of records from those that has the  value true, thus 

 firstclass<-     all[ISINCluster]  
where  all is numeric object 
1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 
 1  1  2  1  3  1  1  2  5  4  1  6  8  1  2  1  3  3  2 13  1  4  2  4  7  1 14  1  1 
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 
 1  1  2  2  1  1  2  2  2  9  3  1  1  3  6  1  4  1  3  9  2 

the firstclass containes the following
firstclass
20 27 
13 14 

And I could not get the first row..
head(firstclass)
20 27 
13 14 


how can I got it?
thanks in advance
Ragia



 		 	   		  
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