Sorry - I should've maybe also pointed out that the command I've been trying to use is: alpha(col="green", 1/10)
On its own this results in the following error: [1] "#00FF001A" and I haven't been able to successfully incorporate it into the main formula just yet (please see my previous message). Without wanting to get too far ahead of myself, is there also a way of making the red points transparent too? (within this command - I've tried using '&' but this results in an error). Many thanks again for any advice you can offer, Steve > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED]; [email protected] > Subject: RE: [R] Use of colour in plots > Date: Fri, 19 Sep 2008 13:45:43 +0000 > > > Thierry, > > Thanks - I've had a look into using the transparency option, but can't seem > to work out where to place it within the command I'm using: > >> ggplot(Jan, aes(x = PopDensity, y = Average.Burnt.Area.Fraction, colour = >> factor(Urban.Rural> 1.25))) + geom_point() > > I'm assuming that it has to go in the 'aes' section somewhere, but I seem to > be encountering errors wherever I insert it. This doesn't seem to be > mentioned in the book, so do you have any tips?! > > Also, out of interest, what does the 'geom_point()' command do? > > Thanks again, > > Steve > > > >> Subject: RE: [R] Use of colour in plots >> Date: Fri, 19 Sep 2008 10:31:58 +0200 >> From: [EMAIL PROTECTED] >> To: [EMAIL PROTECTED]; [email protected] >> >> Steve, >> >> - Use tranparancy to prevent overplotting: more details on p. 16 of the >> ggplot2 book: http://had.co.nz/ggplot2/book/ >> - You can choose your own colour with scale_manual(): >> http://had.co.nz/ggplot2/scale_manual.html >> - The backgroundcolor can be set with ggopt(background.color = "white"): >> http://rweb.stat.umn.edu/R/library/ggplot/html/build-options-8a.html >> >> HTH, >> >> Thierry >> >> >> ------------------------------------------------------------------------ >> ---- >> ir. Thierry Onkelinx >> Instituut voor natuur- en bosonderzoek / Research Institute for Nature >> and Forest >> Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, >> methodology and quality assurance >> Gaverstraat 4 >> 9500 Geraardsbergen >> Belgium >> tel. + 32 54/436 185 >> [EMAIL PROTECTED] >> www.inbo.be >> >> To call in the statistician after the experiment is done may be no more >> than asking him to perform a post-mortem examination: he may be able to >> say what the experiment died of. >> ~ Sir Ronald Aylmer Fisher >> >> The plural of anecdote is not data. >> ~ Roger Brinner >> >> The combination of some data and an aching desire for an answer does not >> ensure that a reasonable answer can be extracted from a given body of >> data. >> ~ John Tukey >> >> -----Oorspronkelijk bericht----- >> Van: Steve Murray [mailto:[EMAIL PROTECTED] >> Verzonden: donderdag 18 september 2008 19:08 >> Aan: [email protected]; ONKELINX, Thierry; [EMAIL PROTECTED]; >> [EMAIL PROTECTED]; [EMAIL PROTECTED] >> Onderwerp: RE: [R] Use of colour in plots >> >> >> Dear Thierry and all, >> >> I've tried out ggplot from the ggplot2 package and it seems to provide >> much more favourable results! >> >> Just a few questions I have after consulting the 'help' file for ggplot. >> >> Is there a way of preventing overplotting? Some of the red points are >> being obscured by the green ones. I've tried changing the size of the >> points (using size=1) but this doesn't resolve the issue, as there are >> many points quite densely packed in some parts of the graph. >> >> Also how would I change the colours if I wished (for future plots of a >> similar format)? And how do you customise the legend? >> >> Finally, is there a way of changing the grey background of the graph to >> white? >> >> Sorry for all the questions, it's just that I'm new to the ggplot2 >> package and can't find the answers in the help file or on the associated >> website! >> >> Many thanks to anyone who's able to offer any advice. >> >> Best wishes, >> >> Steve >> >> >> >>> Subject: RE: [R] Use of colour in plots >>> Date: Thu, 18 Sep 2008 14:52:57 +0200 >>> From: [EMAIL PROTECTED] >>> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] >>> CC: [email protected] >>> >>> Steve, >>> >>> Have a look at the ggplot2 package: >>> >>> library(ggplot2) >>> ggplot(Jan, aes(x = PopDensity, y = Average.Burnt.Area.Fraction, >> colour >>> = factor(Urban.Rural> 1.25))) + geom_point() >>> >>> >>> >> ------------------------------------------------------------------------ >>> ---- >>> ir. Thierry Onkelinx >>> Instituut voor natuur- en bosonderzoek / Research Institute for Nature >>> and Forest >>> Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, >>> methodology and quality assurance >>> Gaverstraat 4 >>> 9500 Geraardsbergen >>> Belgium >>> tel. + 32 54/436 185 >>> [EMAIL PROTECTED] >>> www.inbo.be >>> >>> To call in the statistician after the experiment is done may be no >> more >>> than asking him to perform a post-mortem examination: he may be able >> to >>> say what the experiment died of. >>> ~ Sir Ronald Aylmer Fisher >>> >>> The plural of anecdote is not data. >>> ~ Roger Brinner >>> >>> The combination of some data and an aching desire for an answer does >> not >>> ensure that a reasonable answer can be extracted from a given body of >>> data. >>> ~ John Tukey >>> >>> -----Oorspronkelijk bericht----- >>> Van: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] >>> Namens Steve Murray >>> Verzonden: donderdag 18 september 2008 13:58 >>> Aan: Petr PIKAL; [EMAIL PROTECTED] >>> CC: [email protected] >>> Onderwerp: Re: [R] Use of colour in plots >>> >>> >>> Dear all, >>> >>> I've finally got round to plotting my data and trying to apply colour >>> (had some problems with the data which I needed to rectify first!). >> I'm >>> having trouble however getting the colour to work as I'd hoped, >> despite >>> the help offered in previous messages. >>> >>> Just to recap, and with more specifics this time, I have a data frame >> as >>> follows: >>> >>> >>>> head(Jan) >>> Latitude Longitude Urban.Rural Average.Burnt.Area.Fraction PopDensity >>> GDP >>> 1 -0.25 -49.25 1.000000 9e-05 1.8703090 >>> 25694 >>> 2 -0.25 -50.25 1.000000 2e-05 2.5962470 >>> 32205 >>> 3 -0.25 -50.75 1.000000 0e+00 3.5221470 >>> 39312 >>> 4 -0.25 -51.25 1.042432 5e-06 14.2919000 >>> 87685 >>> 5 -0.25 -51.75 1.000000 1e-05 0.5721315 >>> 11376 >>> 6 -0.25 -52.25 1.000000 4e-05 0.7262031 >>> 11083 >>> Cropland.Area..km.2.grid.cell. >>> 1 0.4260444 >>> 2 0.3401146 >>> 3 0.3036076 >>> 4 0.3147694 >>> 5 0.2843388 >>> 6 0.1734099 >>> >>> >>> I hope to plot Average.Burnt.Area.Fraction (ABAF) against PopDensity >>> (which I have done using:> plot(Jan[,3],Jan[,4]) ). >>> >>> However, the twist is, I hope these points to be coloured according to >>> the values of Urban.Rural (but don't want this column to actually be >>> plotted). I am looking to do, if Urban.Rural>1.25 then colour the >> point >>> red, and if it's = To: [EMAIL PROTECTED] >>>> CC: [email protected]; [EMAIL PROTECTED] >>>> Subject: Re: [R] Use of colour in plots >>>> From: [EMAIL PROTECTED] >>>> Date: Fri, 5 Sep 2008 16:40:47 +0200 >>>> >>>> Hi >>>> >>>> [EMAIL PROTECTED] napsal dne 05.09.2008 16:24:35: >>>> >>>>> Here is an example doing the same type of thing. >>>>> It should be easy enough to adapt. >>>>> >>>>> Good luck >>>>> >>>>> =========================================================== >>>>> x <- runif(100, 0, 1) >>>>> y <- runif(100, 0, 1) >>>>> z <- data.frame(x,y) >>>>> >>>>> plot(subset(z, z$y>=.5), col="red", ylim=c(min(z$y), >>>>> max(z$y)), pch=16) >>>>> points(subset(z, z$y <=.49), col="blue", pch=16) >>>>> =========================================================== >>>> >>>> Or >>>> >>>> third <- (z$y>=.5)+1 >>>> plot(z, col=third, pch=16) >>>> >>>> Just tell to col a vector of colors with appropriate use of logical. >>>> >>>> Or you can use col = as.numeric(some factor), which is quite >>> convenient >>>> use of factors feature which is not desired in other cases. >>>> See warning section of factor help page. >>>> >>>> Regards >>>> >>>>> >>>>> >>>>> --- On Fri, 9/5/08, Steve Murray wrote: >>>>> >>>>>> From: Steve Murray >>>>>> Subject: [R] Use of colour in plots >>>>>> To: [email protected] >>>>>> Received: Friday, September 5, 2008, 9:10 AM >>>>>> Dear all, >>>>>> >>>>>> I have 3 datasets all of which share the same longitude and >>>>>> latitude values, which I'm looking to plot onto a >>>>>> scattergraph. The third dataset has values which can only be >>>>>> either '1' or '2'. So to incorporate all >>>>>> three datasets onto two axes, I'm wondering if I can >>>>>> plot dataset1 and dataset2 as normal, but then use colour to >>>>>> determine whether these points are either values '1' >>>>>> or '2' according to the third dataset. >>>>>> >>>>>> If so, how would I go about doing this in R, and what >>>>>> format would the command take? >>>>>> >>>>>> Thanks for any help offered, >>>>>> >>>>>> Steve >>>>>> >>>>>> ______________________________________________ >>>>>> [email protected] 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. >>>>> >>>>> ______________________________________________ >>>>> [email protected] 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. >>>> >>> >>> ______________________________________________ >>> [email protected] 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. >>> >>> Dit bericht en eventuele bijlagen geven enkel de visie van de >> schrijver weer en binden het INBO onder geen enkel beding, zolang dit >> bericht niet bevestigd is door een geldig ondertekend document. The >> views expressed in this message and any annex are purely those of the >> writer and may not be regarded as stating an official position of INBO, >> as long as the message is not confirmed by a duly signed document. >> >> _________________________________________________________________ >> Discover Bird's Eye View now with Multimap from Live Search >> http://clk.atdmt.com/UKM/go/111354026/direct/01/ >> >> Dit bericht en eventuele bijlagen geven enkel de visie van de schrijver weer >> en binden het INBO onder geen enkel beding, zolang dit bericht niet >> bevestigd is door een geldig ondertekend document. The views expressed in >> this message and any annex are purely those of the writer and may not be >> regarded as stating an official position of INBO, as long as the message is >> not confirmed by a duly signed document. > > _________________________________________________________________ > Win New York holidays with Kellogg’s & Live Search > http://clk.atdmt.com/UKM/go/111354033/direct/01/ ______________________________________________ [email protected] 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.
