Displaying 6 results from an estimated 6 matches for "unmixing".
2006 Mar 23
1
PCA, Source analysis and Unmixing, environmental forensics
...mental 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 have
been analyzed in all of the samples. In most cases concentrations are
converted to proportion of total as we are interested in composition
rather that simple dilution.
I have had great success with ratio analysis; simple expl...
2017 Jul 01
1
manual pitch modification
...+-------------------+----------------+
| 6
| +------------+ +-------------+
+-->| Stereo |-->| Sample Rate |-->
| Unmixing | 7 | Conversion | 8
+------------+ +-------------+
Thanks,
-Mark
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2005 Mar 17
1
Optimization of constrained linear least-squares problem
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 im...
2005 Dec 13
1
Polytopic Vector Analysis (PVA)
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
2009 Jul 02
2
working with texts
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
2000 Jun 13
1
Re: [livid-ovd] putting the video into ogg multimedia
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