[R] get the first row ?

[David Winsemius]

On May 10, 2015, at 2:26 AM, Ragia Ibrahim wrote:

> 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 

The thing you are calling "the first row" is actual the names attrobute for that vector.
> 
> 
> how can I got it?

names(firstclass)

> thanks in advance
> Ragia


--
David Winsemius
Alameda, CA, USA