Displaying 11 results from an estimated 11 matches for "invec".
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nvec
2007 Aug 24
4
Turning a logical vector into its indices without losing its length
...which gives me what I want for temp based on
logvec but I was wondering if there was a shorter way ( i.e :
a one liner ) without having to initialize temp to zeros. This is
purely for learning purposes. Thanks.
logvec <- c(TRUE,FALSE,FALSE,TRUE,FALSE,FALSE,TRUE,FALSE)
temp<-numeric(length(invec))
temp[invec]<-which(invec)
temp
[1] 1 0 0 4 0 0 7 0
obviously, the code below doesn't work.
temp <- which(invec)
> temp
[1] 1 4 7
--------------------------------------------------------
This is not an offer (or solicitation of an offer) to buy/se...{{dropped}}
2008 Oct 20
2
R Newbie Question
...ar2center[1] = 0.5
star2center[2] = 0
star2mass = 1
sqr = function(x) {
return(x * x)
}
distance = function(a, b) {
return(sqrt(sqr(a[1] - b[1]) + sqr(a[2] - b[2])))
}
len = function(x) {
return(sqrt(sqr(x[1]) + sqr(x[2])))
}
norm = function(x) {
return(x / len(x))
}
gravitation = function(invecx, invecy) {
invec = vector("numeric", 2)
invec[1] = invecx
invec[2] = invecy
vec1 = star1mass * norm(star1center - invec) / sqr(distance(invec,
star1center))
vec2 = star2mass * norm(star2center - invec) / sqr(distance(invec,
star2center))
return(len(vec1 + vec2))
}
vmin = -1
vmax =...
2009 Dec 16
2
What is the fastest way to see what are in an RData file?
Currently, I load the RData file then ls() and str(). But loading the file
takes too long if the file is big. Most of the time, I only interested what
the variables are in the the file and the attributes of the variables (like
if it is a data.frame, matrix, what are the colnames/rownames, etc.)
I'm wondering if there is any facility in R to help me avoid loading the
whole file.
2007 Nov 26
3
Time Series Issues, Stationarity ..
Hello,
I am very new to R and Time Series. I need some help including R codes
about the following issues. I' ll really appreciate any number of
answers...
# I have a time series data composed of 24 values:
myinput = c(n1,n2...,n24);
# In order to make a forecasting a, I use the following codes
result1 = arima(ts(myinput),order = c(p,d,q),seasonal = list(order=c(P,D,Q)))
result2 =
2012 Aug 01
0
[LLVMdev] X86 isTargetShuffle Question
...performed by DAGCombiner, but
/// shuffles have been customed lowered so we need to handle those here.
static SDValue XFormVExtractWithShuffleIntoLoad(SDNode *N, SelectionDAG &DAG,
TargetLowering::DAGCombinerInfo &DCI) {
[...]
if (!isTargetShuffle(InVec.getOpcode()))
return SDValue();
[...]
}
It seems like we'd want to be able to "find scalars" or fold loads in as
many different kinds of shuffle as possible. But a whole bunch went
missing between 2.9 and 3.1, particularly AVX shuffles.
Can someone explain what happened here?...
2005 Mar 04
0
Ti sei cancellato con successo
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o andando sul sito www.tuttinudi.it
Buona giornata
Lo staff di tuttinudi
2007 Jul 30
2
EditingCentOSWiki in Italian
= Linee guida per la modifica del Wiki di CentOS =
Questa pagina contiene alcune linee guida per la modifica del Wiki. Poich?
queste linee guida sono in divenire, ricordatevi di tornare su questa pagina
ogni tanto.
== Linee guida riguardo al markup del Wiki ==
* Usare link relativi invece che link assoluti o link liberi. I link
relativi devono avere la forma seguente: {{{[:Percorso:Testo collegato]}}}
Per esempio, per collegare la sottopagina "Bar" a questa pagina, si dovrebbe
usare: {{{[:/Bar:Questo testo sar? il link]}}}
* Se le vostre pagine cominciano a diventare tro...
2010 Mar 19
2
Dataframe calculations
Hi everyone,
My question will probably seem simple to most of you, but I
have spent many hours trying to solve it. I need to perform
a series of sequential calculations on my dataframe that move
across rows and down columns, and then repeat themselves at
each unique 'MM' by 'DD' grouping. Specifically, I want to add
'DEPART' time (24 hr time) to 'TRAVEL'(minutes)
2009 May 21
0
[LLVMdev] [PATCH] Add new phase to legalization to handle vector operations
On Wed, May 20, 2009 at 4:55 PM, Dan Gohman <gohman at apple.com> wrote:
> Can you explain why you chose the approach of using a new pass?
> I pictured removing LegalizeDAG's type legalization code would
> mostly consist of finding all the places that use TLI.getTypeAction
> and just deleting code for handling its Expand and Promote. Are you
> anticipating something more
2009 May 20
2
[LLVMdev] [PATCH] Add new phase to legalization to handle vector operations
On May 20, 2009, at 1:34 PM, Eli Friedman wrote:
> On Wed, May 20, 2009 at 1:19 PM, Eli Friedman
> <eli.friedman at gmail.com> wrote:
>
>> Per subject, this patch adding an additional pass to handle vector
>>
>> operations; the idea is that this allows removing the code from
>>
>> LegalizeDAG that handles illegal types, which should be a significant
2009 May 21
2
[LLVMdev] [PATCH] Add new phase to legalization to handle vector operations
...ned i = 0; i != NewNumElts_Lo; ++i) {
- SDValue IdxNode = Mask.getOperand(i);
- if (IdxNode.getOpcode() == ISD::UNDEF) {
- Ops.push_back(DAG.getUNDEF(NewEltVT));
- continue;
- }
- unsigned Idx = cast<ConstantSDNode>(IdxNode)->getZExtValue();
- SDValue InVec = Node->getOperand(0);
- if (Idx >= NumElements) {
- InVec = Node->getOperand(1);
- Idx -= NumElements;
- }
- Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NewEltVT, InVec,
- DAG.getConstant(Idx, PtrVT)));
- }
- Lo...