Displaying 2 results from an estimated 2 matches for "128,128".
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2003 Apr 22
3
Problem with pixmap on R 1.7.0?
Hi R users:
I got the following message when I use the pixmap library
on R 1.7.0 over w2K platform (on R 1.6.2 it runs right).
pixmapGrey(matrix(c(0,1),128,128))
Error in .class1(object) : Object "from" not found
I download the library .zip file from:
http://cran.r-project.org/bin/windows/contrib/1.7/pixmap_0.3-2.zip
Other question:
When I try to "Install package(s) from bioconductor" I got the
following message:
local({a<-...
2011 May 02
2
easy way to do a 2-D fit to an array of data?
...coordinates of each pixel
(or equivalently, the row, column numbers).
Is there an R function that lets me easily implement that? I've started
down the path of something like
zvec <- as.vector(Z), and creating applicable x,y vectors by something
like (where for the sake of argument Z is 128x128)
foo<-matrix(seq(1,128),128,128)
xvec <- as.vector(foo)
yvec <- as.vector(t(foo))
at which point I can feed zvec, xvec, yvec to lm() .
I'm hopeful someone can point me to a much easier way to do the same
thing. Oh, and if there's a 2-D splinefunction generator, that wou...