[R] Raster Help

[Simon Tarr]

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]]
> >
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