Hello Josh,
It works. Thanks a lot!!
I have now the basic tools to advance!
Best!
Ulisses
2011/4/5 Joshua Wiley-2 [via R]
:
> Hi Ulisses,
>
> Look at the functions ?match and ?rbind
>
> If you do not want to do it by hand, you can make a little function as
> below.
>
> HTH,
>
> Josh
>
> d1 <- data.frame(goals = 4:1, players = LETTERS[1:4])
> d2 <- data.frame(goals = c(1, 3, 2, 5), players = LETTERS[3:6])
>
> f <- function(old, new, check) {
> Â index <- new[, check] %in% old[, check]
> Â dat <- rbind(old, new[index, ])
> Â tocheck <- new[!index, ]
> Â list(merged = dat, tocheck = tocheck)
> }
>
> dmerged <- f(d1, d2, "players")
> ## check "tocheck" and once it is correct
> dfinal <- do.call("rbind", dmerged)
>
> On Tue, Apr 5, 2011 at 8:06 AM, Ulisses.Camargo
> <[hidden email]> wrote:
>> The example scene:
>>
>> I have a database with stats about each goal made by my soccer team. This
>> database (a data frame in R) is organized in lines (goals) with a set of
>> columns containing data about these goals (player name, tactic position,
>> etc). For now, this database will be called "data.frame1".
>>
>> What I need is to feed this "data.frame1" with new information about my
>> team
>> goals. I will call this new information "data.frame2". This set of new
>> goals
>> is organized in the same way as in "data.frame1" (equal numbers of cols).
>>
>> Where help is needed:
>>
>> I need help in finding a way to check the player-name column in
>> "data.frame2" before feeding "data.frame1" with it. What I need is a way
>> to
>> verify the name of the player on each line of "data.frame2" with the names
>> of players that already exist on a col in "data.frame1". Moreover, I need
>> R
>> to make two main things:
>>
>> First, the lines of âdata.frame2â with player names that already exists
>> in
>> âdata.frame1â must be added to âdata.frame1â.
>>
>> Second: lines of âdata.frame2â with player names that does not exist on
>> âdata.frame1â must be listed in an output to be manually checked and
>> corrected.
>> After this verification, corrected lines and new-player-names lines must
>> be
>> incorporated in "data.frame1".
>>
>> What I want is to guarantee that will be no lines with wrong player names
>> in
>> my database.
>> At the same time, my script must permit new information to be added (new
>> player names).
>>
>> Is there somebody who could help me with this?
>>
>> Thanks for your attention
>>
>> Best wishes
>> Ulisses
>>
>> --
>> View this message in context:
>> http://r.789695.n4.nabble.com/Help-to-check-data-before-putting-it-in-a-database-tp3428318p3428318.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
> --
> Joshua Wiley
> Ph.D. Student, Health Psychology
> University of California, Los Angeles
> http://www.joshuawiley.com/
>
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--
Ulisses Moliterno de Camargo
Instituto Nacional de Pesquisas da Amazônia
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