Message-ID: <23D49AE1-8DD1-42A2-A0ED-D59DBE55E170@comcast.net>
Date: 2011-08-18T18:40:49Z
From: David Winsemius
Subject: Concatenate two strings in one in a string matrix
In-Reply-To: <CADSJR0uPcMToOx18Nso7RPNantuU0yeZOv0TucXrbPS0cD-Q7Q@mail.gmail.com>
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