Displaying 6 results from an estimated 6 matches for "dx3".
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2010 Aug 10
3
sapply/lapply instead of loop
Using the input below, can I do something more elegant (and more efficient)
than the loop also listed below to pad strings to a width of 5? The true
matrix is about 300K rows and 31 columns.
#######################
#INPUT
#######################
> temp
DX1 DX2 DX3
1 13761 8125 49178
2 63371 v75 22237
3 51745 77703 93500
4 64081 32826 v72
5 78477 43828 87645
>
#######################
#CODE
#######################
ssize <- c(nrow(temp), ncol(temp))
aa <- c(1:ssize[2])
aa <- paste("DX", aa, sep = "")
record <- matrix(&...
2006 Aug 09
2
Speeding indexing and sub-sectioning of 3d array
Hi,
I am having a problem with a very slow indexing and sub-sectioning of a 3d
array:
> dim(arr)
[1] 245 175 150
For each point in the array, I am trying to calculate the mean of the values
in its surrounding:
mean( arr[ (i - radius):(i + radius),
(j - radius):(j + radius),
(k - radius):(k + radius)] )
Putting that code in 3
2009 Sep 25
1
simulating a model
...follows:
require(simecol)
mod1 <- new("odeModel",
main = function(time, init, parms) {
x <- init
p <- parms
dx1 <- p["K"] - p["alpha"]*x[1]*x[2] - p["gamma"]*x[1]
dx2 <- x[1]*x[2]*(p["alpha"] - p["beta"])
dx3 <- p["beta"]*x[1]*x[2] + p["gamma"]*x[1]
list(c(dx1, dx2, dx3))
},
times = c(from=0, to=100, by=0.1),
parms = c(K=100, alpha=0.3, gamma=0.5, beta=0.2),
init = c(S=500, V=100, R=0),
solver = "lsoda"
)
plot(sim(mod1))
Thanks in advance!
Rafael.
_________...
2009 Nov 13
0
about the pgmm in plm package (application and singularity)
...,X2, 0, 0, 0, 0, 0, ............
0, 0, 0, y1, y2, X1, X2, X3, ............
.....................................................] with 2 period
loss
I can put X as part of gmm.inst, and specify the lag.gmm
If X are not specified,
Z=[y1, 0, 0, 0, 0, 0, 0, ................. dX3
0, y1,y2, 0, 0, 0, 0, ................. dX4.
0, 0, 0, y1,y2, y3,0, ................. dX5]with 2 period loss
I don't put X as part of gmm.inst nor speficy the lag.gmm of X
But if X are strictly exogenous, I don't know how I can implement this case
by the command.
Z=[y1,...
2009 Apr 05
3
WineVDM crash on CDROM speed test...
I'm trying to install Lords of The Realm II and while it doesn't affect whether or not you ca install the game, I have encountered two crashes if you allow the installer to test your system. The crashes occur when testing CDROM speed and when checking processor speed.
CDROM speed test error:
Code:
68 0x7eb1ee57 DispatchMessageW+0x103() in user32 (0x007fdff8) 69
2008 Jun 30
4
Rebuild of kernel 2.6.9-67.0.20.EL failure
Hello list.
I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without
modifications.
How did I try it?
Created a (non-root) build environment (not a mock )
Installed the kernel.scr.rpm and did a
rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee
prep-out.log
The build failed at the end:
Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL
Checking