[R] Multiple count if style "queries"
Phil Spector
spector at stat.berkeley.edu
Sat May 21 00:08:02 CEST 2011
Chris -
It's pretty easy to calculate these counts, the tricky part
is what kind of object to put them in. Here's a way that returns
a list of lists:
> parts = split(data2,data2$ECO_NAME)
> result = lapply(parts,function(x)
list(Order=table(as.character(x$Order)),
Family=table(as.character(x$Family)),
Genus=table(as.character(x$Genus))))
So to reproduce your (poorly chosen) example:
> result[['Biak-Numfoor rain forests']]
$Order
Alismatales Asparagales
1 1
$Family
Araceae Orchidaceae
1 1
$Genus
Bromheadia Homalomena
1 1
or to see each piece individually:
> result[['Biak-Numfoor rain forests']]$Order
Alismatales Asparagales
1 1
> result[['Biak-Numfoor rain forests']]$Family
Araceae Orchidaceae
1 1
> result[['Biak-Numfoor rain forests']]$Genus
Bromheadia Homalomena
1 1
Hope this helps.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spector at stat.berkeley.edu
On Fri, 20 May 2011, Chris Mcowen wrote:
> Sorry for not including the data, i did intend to.
>
> I tried your code but got this error:
>
>>> answer <- sqldf("
>> + select ECO_NAME
>> + , count(distinct Order) as Order
>> + , count(distinct Family) as Family
>> + , count(distinct Genus) as Genus
>> + from data2
>> + group by ECO_NAME
>> + ")
>> Loading required package: tcltk
>> Loading Tcl/Tk interface ... done
>> Error in sqliteExecStatement(con, statement, bind.data) :
>> RS-DBI driver: (error in statement: near "Order": syntax error)
>
> For the second question i would want:
>
> The number of times each Order/Family and Genus was represented in each eco_region.
>
> I.E
>
> Biak-Numfoor rain forests
> Order: Alismatales-1, Araceae-1
> Family: Homalomena -1, Asparagales-1
> Genus: Orchidaceae-1, Bromheadia-1
>
> So the number after each name is the count.
>
> Thanks for the help.
>
> Chris
>
>
> data2 <- structure(list(ECO_NAME = structure(c(1L, 1L, 2L, 2L, 2L, 2L,
> 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L,
> 3L, 3L, 3L, 3L, 3L), .Label = c("Biak-Numfoor rain forests",
> "Central Range montane rain forests", "Huon Peninsula montane rain forests"
> ), class = "factor"), Order = structure(c(1L, 2L, 1L, 2L, 2L,
> 2L, 2L, 2L, 2L, 2L, 2L, 3L, 4L, 4L, 4L, 4L, 4L, 4L, 5L, 5L, 5L,
> 2L, 2L, 2L, 2L, 4L, 4L), .Label = c("Alismatales", "Asparagales",
> "Commelinales", "Poales", "Zingiberales"), class = "factor"),
> Family = structure(c(1L, 7L, 1L, 6L, 7L, 7L, 7L, 7L, 7L,
> 7L, 7L, 3L, 2L, 4L, 4L, 5L, 8L, 8L, 9L, 9L, 9L, 7L, 7L, 7L,
> 7L, 2L, 8L), .Label = c("Araceae", "Centrolepidaceae", "Commelinaceae",
> "Cyperaceae", "Eriocaulaceae", "Lomandraceae", "Orchidaceae",
> "Poaceae", "Zingiberaceae"), class = "factor"), Genus = structure(c(13L,
> 3L, 13L, 6L, 19L, 9L, 20L, 4L, 4L, 9L, 9L, 15L, 5L, 14L,
> 10L, 11L, 17L, 16L, 1L, 8L, 2L, 18L, 7L, 19L, 12L, 5L, 16L
> ), .Label = c("Alpinia", "Amomum", "Bromheadia", "Bulbophyllum",
> "Centrolepis", "Cordyline", "Corybas", "Curcuma", "Dendrobium",
> "Eleocharis", "Eriocaulon", "Glomera", "Homalomena", "Machaerina",
> "Murdannia", "Poa", "Schizostachyum", "Taeniophyllum", "Thelymitra",
> "Vanda"), class = "factor")), .Names = c("ECO_NAME", "Order",
> "Family", "Genus"), class = "data.frame", row.names = c(NA, -27L
> ))
>
>
> On 20 May 2011, at 22:33, jim holtman wrote:
>
> use the 'sqldf' package. Also use 'dput' to include sample data since
> it was impossible to use the data in the format you provided, so my
> guess at a solution would be:
>
> answer <- sqldf("
> select ECO_NAME
> , count(distinct Order) as Order
> , count(distinct Family) as Family
> , count(distinct Genus) as Genus
> from yourData
> group by ECO_NAME
> ")
>
> Not sure exactly what you wanted in the second question; it would be
> nice to include what some sample output would be so we have an idea of
> what you are after.
>
> On Fri, May 20, 2011 at 5:18 PM, Chris Mcowen <chrismcowen at gmail.com> wrote:
>> Dear List,
>>
>> I am looking to calculate two things from my data frame and was after some advice. For the example below i want to know.
>>
>> 1. How many unique Orders/Families and Genera there are per eco-name
>>
>> 2. How many incidences are there for each Order/Family and Genus there are per eco-region
>>
>> I have 650 econame.
>>
>> I.e for Biak-Numfoor rain forests there are 2 orders, 2 families and two genera. Also, Alismatales are represented once, Asparagales once etc etc.
>>
>> Thanks for any advice.
>>
>> Chris
>>
>>
>> ECO_NAME Order Family Genus
>> Biak-Numfoor rain forests Alismatales Araceae Homalomena
>> Biak-Numfoor rain forests Asparagales Orchidaceae Bromheadia
>> Central Range montane rain forests Alismatales Araceae Homalomena
>> Central Range montane rain forests Asparagales Lomandraceae Cordyline
>> Central Range montane rain forests Asparagales Orchidaceae Thelymitra
>> Central Range montane rain forests Asparagales Orchidaceae Dendrobium
>> Central Range montane rain forests Asparagales Orchidaceae Vanda
>> Central Range montane rain forests Asparagales Orchidaceae Bulbophyllum
>> Central Range montane rain forests Asparagales Orchidaceae Bulbophyllum
>> Central Range montane rain forests Asparagales Orchidaceae Dendrobium
>> Central Range montane rain forests Asparagales Orchidaceae Dendrobium
>> Central Range montane rain forests Commelinales Commelinaceae Murdannia
>> Central Range montane rain forests Poales Centrolepidaceae Centrolepis
>> Central Range montane rain forests Poales Cyperaceae Machaerina
>> Central Range montane rain forests Poales Cyperaceae Eleocharis
>> Central Range montane rain forests Poales Eriocaulaceae Eriocaulon
>> Central Range montane rain forests Poales Poaceae Schizostachyum
>> Central Range montane rain forests Poales Poaceae Poa
>> Central Range montane rain forests Zingiberales Zingiberaceae Alpinia
>> Central Range montane rain forests Zingiberales Zingiberaceae Curcuma
>> Central Range montane rain forests Zingiberales Zingiberaceae Amomum
>> Huon Peninsula montane rain forests Asparagales Orchidaceae Taeniophyllum
>> Huon Peninsula montane rain forests Asparagales Orchidaceae Corybas
>> Huon Peninsula montane rain forests Asparagales Orchidaceae Thelymitra
>> Huon Peninsula montane rain forests Asparagales Orchidaceae Glomera
>> Huon Peninsula montane rain forests Poales Centrolepidaceae Centrolepis
>> Huon Peninsula montane rain forests Poales Poaceae Poa
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
>
>
> --
> Jim Holtman
> Data Munger Guru
>
> What is the problem that you are trying to solve?
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
More information about the R-help
mailing list