similar to: grDevices::convertColor and colorRamp(space='Lab') Performance Improvements

It appears that the chromatic adaptation feature of `grDevices::convertColor`is broken, and likely has been for many years.? While a little surprising, it is an obscure enough feature that there is some possibility this is actually broken, as opposed to user error on my part.? If it turns out to the latter, I apologize in advance for spamming this list. Consider: ??? rgb.in <-

grDevices::convertColor has arguments 'from' and 'to' which can take on value 'XYZ'. Can someone confirm that 'XYZ' is the same as the CIE chromaticity coordinates that are also sometimes refered to as 'xyY' in the literature? Or are these the CIE tristimulus values? It looks to me like the first case is true, but I would appreciate hearing from one of

Hi all, I had the need to create a colorbar considering the alpha channel of the colors, but colorRamp() and colorRampPalette() ignored the alpha argument in rgb(). So I performed some minor modifs. in their codes, as to support the interpolation using the alpha channel. I guess that those simple modifications might be useful for other people, so perhaps it would be worth to add them to

In an R graphic, I'm using cond.col <- c("green", "yellow", "red") to represent a quantitative variable, where green means 'OK', yellow represents 'warning' and red represents 'danger'. Using these particular color names, in B/W, red is darkest and yellow is lightest. I'd like to find color designations to replace yellow and

Hi, The move to sRGB is nice, is there any interest in adding an interface to lcms, http://www.littlecms.com, to allow gamut matching? I can think of a lot of instances where I would like to render a figure as it would appear on my printer. This is probably best done as a separate package though, at least at first. Nicholas Martin Maechler wrote: >>>>>> "Paul" ==

Il 30/04/20 03:14, Dirk Eddelbuettel ha scritto: > > On 30 April 2020 at 03:05, Samuele Carcagno wrote: > | Il 30/04/20 01:39, Dirk Eddelbuettel ha scritto: > | > Keep. It. Simple. And. Concise. > | > > | > And reproducible. > | > | I've attached a script that triggers the bug on my system. It's just two > | lines, one to load `viridisLite`, and one to

Hi Guys luv your product but ive become stuck since updating to Suse Linux Enterprise 9, Id luv some advice on where i should be looking to resolve this issue.. basically... when shorewall is off all ports are showing to the internet ''25,80,443,ect'' and i can ping my box from an external source. ''with stopped rule created to allow ppp0'' when shorewall is on

Hey folks, We are planning a migration away from Dovecot (sorry) to Google Apps and are trying to figure out how to migrate the contents of user mailboxes to the new provider. Normally we would use an IMAP migration tool to log into each user's mailbox on the old and new providers and transfer the data that way. However, there is no central directory service; all accounts are local. We

Hello, I am having (weird) issues with XFS, in that open(...) on certain files takes 45 seconds to return. After the file has been opened, the next file in the same directory takes 45 seconds. If the file was recently opened it returns immediately. I have raised this on several mailing lists, see: <http://lists.luv.asn.au/wws/arc/luv-main/2008-06/msg00143.html>

I try to use ColorRamp as ColorRampPalette (i.e. with the same gradient), but it seems there is a nuance that I've missed. pal.crp<-colorRampPalette( c("blue", "white", "red"), space = "rgb") plot(rep(0,40),pch=16,col=pal.crp(40)) # is great But, using the same gradient with colorRamp is giving erratic colors. pal.cr<-colorRamp(

I have received any responses from LUV so I thought I would try here. "Nic Baxter" <nic@melbpc.org.au> wrote in message news:<1027342247.6846.14.camel@albert>... > I am trying to run our foxpro database program under wine 20020228 on > Mandrake 8.2 with the following output: err:font:AddFontFileToList > Unable to load font file

Hello, I sent this request to my local linux user group: <http://lists.luv.asn.au/wws/arc/luv-talk/2008-02/msg00000.html> Unfortunately it looks like nobody is able to answer, so I will try here: Does anybody know of any sane solution for (globally) managing the configuration of printers on a large number of Windows computers? My current solution is 1. create samba server with printer

Try the rgb function in the grDevices library. pal.cr<-colorRamp( c("blue", "white", "red"), space = "rgb") plot(rep(0,40),pch=16,col=rgb(pal.cr((0:40)/40),max=255)) Troy -- View this message in context: http://n4.nabble.com/ColorRamp-different-from-ColorRampPalette-tp889372p1692642.html Sent from the R help mailing list archive at Nabble.com.

Hello, I am using maptools for plooting geographical data. The colour of the region indicates some region dependent value (population for example). I pass the colours of the regions to the plot.Map function by defining the foreground colour: jet.colors = colorRampPalette(c("#00007F", "blue", "#007FFF", "cyan", "#7FFF7F", "yellow",

On 16/04/2016 8:47 AM, Atte Tenkanen wrote: > Hi, > > How would you calculate the "mean colour" of several colours, for > example c("#FF7C00","#00BF40","#FFFF00")? > Bert answered your subject line question. Your text is asking something else: if those are colours, you don't want to treat each of them as a single integer. A

Hi, How would you calculate the "mean colour" of several colours, for example c("#FF7C00","#00BF40","#FFFF00")? Yours, Atte Tenkanen

Hi there, I try to plot visible light spectrum (380nm~780nm) with color corresponding to the specific wavelength. However, I don't find a function that could do this. Another question, it's possible to plot a color space chromaticity diagram like this: http://upload.wikimedia.org/wikipedia/commons/thumb/0/02/CIExy1931.svg/300px-CIExy1931.svg.png Thanks in advance! Jinsong

https://bugs.freedesktop.org/show_bug.cgi?id=97192 Bug ID: 97192 Summary: SuperTuxkart graphic errors [NVE4 - GK104] Product: Mesa Version: unspecified Hardware: x86-64 (AMD64) OS: other Status: NEW Severity: normal Priority: medium Component: Drivers/DRI/nouveau Assignee:

Hey all, I'm looking into a two-way WAN mirror on two boxes running Mac OS X 10.4. It seems that both rsync (with the -u option) and unison could do this. Any suggestions on how to choose one over the other? Many thanks, noam Noam Birnbaum http://maccentricsolutions.com/ 877.luv.macs x89 ð Apple Certified Technical Coordinator ð Apple Certified Help Desk Specialist --------------

Hey all, Any suggestions on how to estimate how much data rsync would synchronize on average in a given installation? Assume that a full rsync has already run and the only data being updated is just the daily diffs. Thanks, noam Noam Birnbaum http://maccentricsolutions.com/ 877.luv.macs x89 ð Apple Certified Technical Coordinator ð Apple Certified Help Desk Specialist --------------