Hello
Many thanks.
* is not a typo. The output is a description of a nonlinear system so
terms such as y(k-1)*y(k-2) are allowed. I wonder whether "" could be
ignored so that the outputs such as y_{01}(k-003)* would not show up.
Cheers
Ed
On Thu, Aug 18, 2011 at 3:40 PM, David Winsemius <dwinsem...@comcast.net>wrote:
>
> On Aug 18, 2011, at 2:35 PM, Eduardo Mendes wrote:
>
> Dear R-Users
>>
>> I have the following matrix
>>
>> out$desc [,1] [,2]
>>>
>> [1,] "" ""
>> [2,] "y_{01}(k-001)" ""
>> [3,] "y_{01}(k-002)" ""
>> [4,] "y_{01}(k-003)" ""
>> [5,] "u_{01}(k-001)" ""
>> [6,] "u_{01}(k-002)" ""
>> [7,] "u_{01}(k-003)" ""
>> [8,] "y_{01}(k-001)" "y_{01}(k-001)"
>> [9,] "y_{01}(k-001)" "y_{01}(k-002)"
>> [10,] "y_{01}(k-001)" "y_{01}(k-003)"
>> [11,] "y_{01}(k-001)" "u_{01}(k-001)"
>>
>>
>> and need to concatenate each line to a single string. Something like
>>
>> [2,] "y_{01}(k-001)" "" -> [2,] "y_{01}(k-001)"
>>
>> [11,] "y_{01}(k-001)" "u_{01}(k-001)" -> [11,]
>> "y_{01}(k-001)*u_{01}(k-001)"
>>
>> Is there a way to do it without going through every column?
>>
>
> apply(out$desc, 1, paste, collapse="")
>
> It is ambiguous what you want for a delimiter. In one case you used "", and
> another you used "*". I used "".
>
>
> --
>
> David Winsemius, MD
> West Hartford, CT
>
>
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