R help - Nov 2009 - creating multiple plots using a splitting factor

Hello,

 

I am new to R.  I often collect data at multiple sites and need to
create separate graphs (such as scatterplots or histograms) of specific
variables for each site.  I have tried to do this by splitting the data
frame and then using lapply, but it seems that the graphing commands
cannot be called as functions.  Here is a sample of my data, called
"seeddist2":

 

   site    DaysSinceRelease   distance_cm

10  GVM       1           17.8

11  GVM       1           17.8

12  GVM       1           14.0

13  GVM       1           14.0

14  GVM       1           14.9

15  GVM       1           25.4

16  WRR       1           25.4

17  WRR       1           35.0

18  WRR       1           45.0

19  WRR       1           55.0

20  WRR       1           60.0

 

Here is what I tried to get separate histograms of distance_cm by site:

splitlist<- split(seeddist2, site)

lapply(splitlist, hist(distance_cm, breaks=10))

 

I then get an error message saying that "match.fun" didn't find
the
function.  Is there another way to produce multiple graphs at once?

 

Thank you,

 

Danielle B. Johnston, Habitat Researcher

Colorado Division of Wildlife

 


	[[alternative HTML version deleted]]

hist(distance_cm, breaks = 10)
is the **output** of a function and is not itself a function.

On the other hand,
    function(distance_cm) hist(distance_cm, breaks = 10)
is a function.

On Mon, Nov 9, 2009 at 7:01 PM, Johnston, Danielle
<Danielle.Bilyeu at state.co.us> wrote:
> Hello,
>
>
>
> I am new to R. ?I often collect data at multiple sites and need to
> create separate graphs (such as scatterplots or histograms) of specific
> variables for each site. ?I have tried to do this by splitting the data
> frame and then using lapply, but it seems that the graphing commands
> cannot be called as functions. ?Here is a sample of my data, called
> "seeddist2":
>
>
>
> ? site ? ?DaysSinceRelease ? distance_cm
>
> 10 ?GVM ? ? ? 1 ? ? ? ? ? 17.8
>
> 11 ?GVM ? ? ? 1 ? ? ? ? ? 17.8
>
> 12 ?GVM ? ? ? 1 ? ? ? ? ? 14.0
>
> 13 ?GVM ? ? ? 1 ? ? ? ? ? 14.0
>
> 14 ?GVM ? ? ? 1 ? ? ? ? ? 14.9
>
> 15 ?GVM ? ? ? 1 ? ? ? ? ? 25.4
>
> 16 ?WRR ? ? ? 1 ? ? ? ? ? 25.4
>
> 17 ?WRR ? ? ? 1 ? ? ? ? ? 35.0
>
> 18 ?WRR ? ? ? 1 ? ? ? ? ? 45.0
>
> 19 ?WRR ? ? ? 1 ? ? ? ? ? 55.0
>
> 20 ?WRR ? ? ? 1 ? ? ? ? ? 60.0
>
>
>
> Here is what I tried to get separate histograms of distance_cm by site:
>
> splitlist<- split(seeddist2, site)
>
> lapply(splitlist, hist(distance_cm, breaks=10))
>
>
>
> I then get an error message saying that "match.fun" didn't
find the
> function. ?Is there another way to produce multiple graphs at once?
>
>
>
> Thank you,
>
>
>
> Danielle B. Johnston, Habitat Researcher
>
> Colorado Division of Wildlife
>
>
>
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>

Hi

r-help-bounces at r-project.org napsal dne 10.11.2009 01:01:06:
> Hello,
> 
> 
> 
> I am new to R.  I often collect data at multiple sites and need to
> create separate graphs (such as scatterplots or histograms) of specific
> variables for each site.  I have tried to do this by splitting the data
You could also consider lattice and/or ggplot2 packages for that.

Regards
Petr
> frame and then using lapply, but it seems that the graphing commands
> cannot be called as functions.  Here is a sample of my data, called
> "seeddist2":
> 
> 
> 
>    site    DaysSinceRelease   distance_cm
> 
> 10  GVM       1           17.8
> 
> 11  GVM       1           17.8
> 
> 12  GVM       1           14.0
> 
> 13  GVM       1           14.0
> 
> 14  GVM       1           14.9
> 
> 15  GVM       1           25.4
> 
> 16  WRR       1           25.4
> 
> 17  WRR       1           35.0
> 
> 18  WRR       1           45.0
> 
> 19  WRR       1           55.0
> 
> 20  WRR       1           60.0
> 
> 
> 
> Here is what I tried to get separate histograms of distance_cm by site:
> 
> splitlist<- split(seeddist2, site)
> 
> lapply(splitlist, hist(distance_cm, breaks=10))
> 
> 
> 
> I then get an error message saying that "match.fun" didn't
find the
> function.  Is there another way to produce multiple graphs at once?
> 
> 
> 
> Thank you,
> 
> 
> 
> Danielle B. Johnston, Habitat Researcher
> 
> Colorado Division of Wildlife
> 
> 
> 
> 
>    [[alternative HTML version deleted]]
> 
> ______________________________________________
> 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.

Thank you for the responses.  The Lattice library is indeed useful for
producing the graphs in which I am interested, and I appreciate the
clarification between a function and the result of a function.  

Ideally, I would like to be able to page through the graphs rather than
(or in addition to) having them displayed on the same page.  Is there a
way to do this?

Danielle B. Johnston, Habitat Researcher
Colorado Division of Wildlife

-----Original Message-----
From: Phil Spector [mailto:spector at stat.berkeley.edu] 
Sent: Tuesday, November 10, 2009 12:46 AM
To: Johnston, Danielle
Subject: Re: [R] creating multiple plots using a splitting factor

Danielle -
    What you meant to say was

lapply(splitlist, function(x)hist(x$distance_cm, breaks=10))

but you might also be interested in trying

library(lattice)
histogram(~distance_cm|site,data=seeddist2)


 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu




On Mon, 9 Nov 2009, Johnston, Danielle wrote:
> Hello,
>
>
>
> I am new to R.  I often collect data at multiple sites and need to
> create separate graphs (such as scatterplots or histograms) of
specific
> variables for each site.  I have tried to do this by splitting the
data
> frame and then using lapply, but it seems that the graphing commands
> cannot be called as functions.  Here is a sample of my data, called
> "seeddist2":
>
>
>
>   site    DaysSinceRelease   distance_cm
>
> 10  GVM       1           17.8
>
> 11  GVM       1           17.8
>
> 12  GVM       1           14.0
>
> 13  GVM       1           14.0
>
> 14  GVM       1           14.9
>
> 15  GVM       1           25.4
>
> 16  WRR       1           25.4
>
> 17  WRR       1           35.0
>
> 18  WRR       1           45.0
>
> 19  WRR       1           55.0
>
> 20  WRR       1           60.0
>
>
>
> Here is what I tried to get separate histograms of distance_cm by
site:
>
> splitlist<- split(seeddist2, site)
>
> lapply(splitlist, hist(distance_cm, breaks=10))
>
>
>
> I then get an error message saying that "match.fun" didn't
find the
> function.  Is there another way to produce multiple graphs at once?
>
>
>
> Thank you,
>
>
>
> Danielle B. Johnston, Habitat Researcher
>
> Colorado Division of Wildlife
>
>
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>