search for: unmixed

I am using R for environmental forensics (determination of the sources and/or groupings in mixtures of organic chemicals in the field). The goal is to determine in there are groups of samples with similar/dissimilar compositions, and to assign samples to a potential source or a mixture of sources based on the composition (unmixing and source allocation). Typically there are 10 to 50 chemicals that

Hello, When used in SILK mode, is there a way to manually modify the pitch (F0) of the speech signal before resynthesizing during Opus decoding? In the below, we have modified the pitch lags of (4), e.g., with a constant scaling factor 0.5 to decrease the pitch of the voice by one octave. However, the result was perceptually the same as without modifying the pitch lags. +---------+

Dear R-ians, I want to perform an linear unmixing of image pixels in fractions of pure endmembers. Therefore I need to perform a constrained linear least-squares problem that looks like : min || Cx - d || ? where sum(x) = 1. I have a 3x3 matrix C, containing the values for endmembers and I have a 3x1 column vector d (for every pixel in the image). In theory my x values should all be in the

I am curious whether anybody has or is developing this capability within R. I have not found any software yet that has this capability and I am not sure whether it is too new a method and nobody is actually using it, or if there are other means to get the same analysis that I do not know of. Any information regarding developments or use of this method would be helpful. Melanie Edwards

WinXP, R-2.9.1 LS., I have been trying to solve a (for me) tricky issue. No matter what I've tried, I just can't find a way to do this. This is the issue: I have a text file (ansi text) "titles.txt" with lines of text; here is an example of such a file: >>>>> a brief history of polio vaccines anti-vaccination movements and their interpretations early warning

I'll get to the technical aspects of these letters in a bit; they require an a little thought and I'm knee deep in the codebook engine right now... > <RANT> > > I personally favor the MNG approach over the Ogg strategy because of the way > the licensing agreements read. Ogg is more like "you are free to use this, > just don't change it without our