[R] Raster Help

[Simon Tarr]

Hi John & everyone else,

My apologies for not providing you all with a good reproducible example. I
will get to work on this and reply in due course.

Thanks John for pointing me in the right direction with this.

Regards,

On 20 February 2015 at 16:06, John Kane <jrkrideau at inbox.com> wrote:

> Simon,
> You missed a key request from Sven.  He asked for data in dput() format.
> This is essential for dealing with many problems.  Do ?dput for info on the
> function but esssentially it let's the reader see your data exactly as you
> see it, unfazed buy any special setting the reader may have for reading in
> data on R.
>
> Here is a little example of dput output. Just copy and paste into to get
> the new data.frame "dat".
>
> dat1 <- structure(list(Observation = c("A", "B", "C", "D", "E", "F",
> "G", "H"), Participant.ID = c(1L, 1L, 2L, 3L, 3L, 4L, 4L, 5L),
>     Video.Coder = c("Donald", "Tracy", "Donald", "Sam", "Tracy",
>     "Donald", "Tracy", "Sam"), Score = c(4L, 5L, 6L, 2L, 3L,
>     2L, 1L, 8L)), .Names = c("Observation", "Participant.ID",
> "Video.Coder", "Score"), class = "data.frame", row.names = c(NA,
> -8L))
>
> See these for some hints on asking questions.
> https://github.com/hadley/devtools/wiki/Reproducibility
>
> http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
>
>
> John Kane
> Kingston ON Canada
>
>
> > -----Original Message-----
> > From: simon.tarr at adtrak.co.uk
> > Sent: Fri, 20 Feb 2015 15:45:04 +0000
> > To: sven.templer at gmail.com
> > Subject: Re: [R] Raster Help
> >
> > Hi Sven,
> >
> > Many thanks for the reply and my apologies for not posting any code. So
> > far, I have been able to write this (but it's very basic and just getting
> > me to the 'complicated' stage).
> >
> > setwd("C:\\Users\\simon.tarr\\Documents\\GIS\\Test Data")
> > require(raster)
> > require(rgdal)
> > revenue<-read.table("revenue.csv",header=T,row.names=1,sep=",")
> > postcodes<-raster("C:\\Users\\simon.tarr\\Documents\\GIS\\Test
> > Data\\rasters\\postcodes\\postcodes.img")
> > trim(postcodes)
> > plot(postcodes)
> >
> > I have attached a .csv file that contains my revenue data (this is
> > actually
> > just made up data- I wanted to make sure I could get the mapping to work
> > before I start handling large quantities of real data).
> >
> > As I mentioned, the raster contains the same list of postcode names that
> > appear in the CSV. So I need to somehow 'attach' the revenue figures to
> > each postcode in the raster and then plot this.
> >
> > I hope this makes sense and apologies for the loose language...it's the
> > only way I can think of to describe it.
> >
> > I'm trying hard to learn R and its syntax but sometimes I get stuck. I
> > often know what needs to be done but struggle to write the necessary code
> > to make it happen.
> >
> > All the best,
> >
> > Simon
> >
> > On 19 February 2015 at 20:37, Sven E. Templer <sven.templer at gmail.com>
> > wrote:
> >
> >> Without (example) code it is hard to follow... use ?dput to present
> >> some data (subset).
> >> But if it is data.frames you are dealing with (for sure with read.csv,
> >> but not so sure at all with raster maps), give this a try:
> >>
> >> ?merge
> >>
> >> On 19 February 2015 at 17:44, Simon Tarr <simon.tarr at adtrak.co.uk>
> >> wrote:
> >>> Hello everyone,
> >>>
> >>> I need a little help with some R syntax to complete what (I think) is a
> >>> fairly straightforward task- hopefully someone can assist!
> >>>
> >>> I have a raster map of the UK which is split into postcode areas (e.g.
> >> DE,
> >>> NG, NR etc. 127 postcodes in total).
> >>>
> >>> I have installed the package 'raster' and have successfully plotted the
> >>> .img in R. All working and looks correct with the raster.
> >>>
> >>> I also have a comma delimited CSV file containing the same postcodes as
> >> the
> >>> raster with another column next to it containing revenue for each
> >> postcode.
> >>>
> >>> *I was wondering if someone could help me merge/bind the revenue
> >>> figures
> >>> into the correct postcode in the raster so that I can plot revenue per
> >>> postcode.*
> >>>
> >>> I feel I should be using cbind and reclassify to do this but I can't be
> >>> sure.
> >>>
> >>> Any help would be appreciated. Thanks in advance!
> >>>
> >>> Simon
> >>>
> >>>         [[alternative HTML version deleted]]
> >>>
> >>> ______________________________________________
> >>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >>> 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.
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > 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.
>
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