search for: chromat

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 the people in the know. Thanks, Bryan

Has anyone plotted or is it possible to plot CIE *xy* chromaticity diagram http://en.wikipedia.org/wiki/File:CIE1931xy_blank.svg I need this plot in color. ishida [[alternative HTML version deleted]]

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 adv...

...are to make here, is simply that there ain't neither > such thing as "luminance", which details "the eye is more sensitive to", "ain't neither"? Double negative, so I take your statement to mean that there *is* such a thing as luminance...:) > nor "chromaticity", which details the eye is less sensitive to. What we > have here is simply packing 8-bit R, G and B values together in 8-bit Y, > which actually downsamples them to 7..5 bits, as it takes only 77, > 151 and 30 unique values for R, G and B, respectively; than two additional >...

Dear r-helpers, I wonder whether, given the "#rrggbb" representation of a colour, there is a simple way to select the complementary colour, also expressed as a "#rrggbb" string. Any suggestions would be appreciated. John -------------------------------- John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604

Is there any possibility to divide too long text in a plot to two or more lines, when using labels-parameter in the text()-command? Here is an example picture: http://users.utu.fi/attenka/253.jpeg My example script is something like this: text(1,0.7,labels=Chordnames[fnid(pcs%%12)]) # according to Larry Solomon's table http://solomonsmusic.net/pcsets.htm Chordnames is a long vector with

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

Dear R users, I want to generate two random variables (X1, X2) from uniform distribution (-0.5, 0.5) with a specified correlation coefficient r. Does anyone know how to do it in R? Many thanks! Menghui

2015-06-26 17:11 GMT+02:00 Steve Edwards <asterisk.org at sedwards.com>: > On Fri, 26 Jun 2015, Ludovic Gasc wrote: > > 1. What's the "official" notation of each line: "=>" or "=" ? In the wiki >> of Asterisk, I see very often "=>", however, what's the reason for both >> syntaxes authorized ? Historical ? >>

...s (including harpsichord, which is supposed to be hard to code) and the difference with the original (CD rip) is hard to hear. You can find demo files of this at: ftp://freespeech.sourceforge.net/pub/freespeech/ There are 6 files: bach10-ref.sw : Original file (right channel from Bach's Chromatic Fantasia) bach10-ext.sw : Resulting file from my experiment. bach10-lp.sw : Low-passed at 11 kHz bach10-lame-ref.sw : Encoded with lame (128 bps), but original in the low band bach10-ogg-ref.sw : Encoded with vorbis (160 bps), but original in the low band bach10-ogg128-ref.sw...

...now work (more) correctly for multivariate models ("mlm"), thanks to (anonymous) stackoverflow remarks. * sample.int(2.9, *, replace=TRUE) again behaves as documented and as in R < 3.0.0, namely identically to sample.int(2, ..). * Fixes to convertColor() for chromatic adaptation; thanks to Brodie Gaslam PR#17473. * Using \Sexpr[stage=install]{..} to create an Rd section no longer gives a warning in R CMD check; problem originally posted by G'abor Cs'ardi, then reported as PR#17479 with a partial patch by Duncan Murdoch....

...now work (more) correctly for multivariate models ("mlm"), thanks to (anonymous) stackoverflow remarks. * sample.int(2.9, *, replace=TRUE) again behaves as documented and as in R < 3.0.0, namely identically to sample.int(2, ..). * Fixes to convertColor() for chromatic adaptation; thanks to Brodie Gaslam PR#17473. * Using \Sexpr[stage=install]{..} to create an Rd section no longer gives a warning in R CMD check; problem originally posted by G'abor Cs'ardi, then reported as PR#17479 with a partial patch by Duncan Murdoch....

...now work (more) correctly for multivariate models ("mlm"), thanks to (anonymous) stackoverflow remarks. * sample.int(2.9, *, replace=TRUE) again behaves as documented and as in R < 3.0.0, namely identically to sample.int(2, ..). * Fixes to convertColor() for chromatic adaptation; thanks to Brodie Gaslam PR#17473. * Using \Sexpr[stage=install]{..} to create an Rd section no longer gives a warning in R CMD check; problem originally posted by G'abor Cs'ardi, then reported as PR#17479 with a partial patch by Duncan Murdoch....

https://bugs.freedesktop.org/show_bug.cgi?id=110660 Bug ID: 110660 Summary: GeForce GT 750M Mac Edition fullscreen issues Product: Mesa Version: unspecified Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: Drivers/DRI/nouveau Assignee: nouveau

Test test.. 123.. Been having trouble sending to the list.. its icecast@xiph.org right? Just checking. disregard. <p>--- >8 ---- List archives: http://www.xiph.org/archives/ icecast project homepage: http://www.icecast.org/ To unsubscribe from this list, send a message to 'icecast-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is

Does anyone moderate this list? what is up with developers too? It seems like they dont care either about this project :( <p>----- Original Message ----- From: "COL. KENNETH ABELANGE" <kenabel@africamail.com> To: <icecast@xiph.org> Sent: Friday, July 26, 2002 5:24 PM Subject: [icecast] ASSISTANCE <p>> FROM: COL. KENNETH ABELANGE. > DEMOCRATIC REPUBLIC OF