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2009 Nov 12
1
XML: Reading transition matrices into R
Hello, from a software I have the following output in xml (see below): It is a series of matrices, for each age one. I have 3 categories (might vary in the application), hence, 3x3 matrices where each element gives the probability of transition from i to j. I would like read this data into R (preferably in a list, where each list element is one of the age specific matrices) and - after altering the values in R - write it back into the file. I know that there is an xml package in R with which I have already struggled, but I have to adm...
2009 Sep 21
2
Four concurrent Markov chains
...l be to make the animals move in reference to each other using a moving average variable. Therefore I think I need all animals simulated within one subroutine (loop). I probably haven't explained thie very well but here is the code I have been working on.... #creation of a 6*6 matrix with the transition probabilities transitions<-matrix(0,nrow=6,ncol=6); transitions[1,1]<- (0/6); transitions[1,2]<- (0/6); transitions[1,3]<-(0/6); transitions[1,4]<-(0/6);transitions[1,5]<-(0/6); transitions[1,6]<-(6/6);transitions[2,1]<- (1/6);transitions[2,2]<- (1/6); transitions[2,3...
2012 Aug 25
3
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
...gt;> Thanks Anshu! >> >> I've recently added more functional units to our Schedule.td and the >> generation time became painfully long. In fact, the main problem was >> in writeTableAndAPI(). I propose another patch to fix it: >> - Fixed memory leaks. >> - Transitions are attached to states. >> >> I've regenerated the DFA table of Hexagon and everything is ok. >> Please review it. > > I had a few comments about the design change that you're introducing > with the patch: > > This patch adds multiple points of control f...
2019 Sep 11
1
Re: [PATCH nbdkit] tests: Convert some tests to use nbdsh instead of qemu-io.
..._close: closing handle libnbd: debug: nbd5: nbd_create: opening handle libnbd: debug: nbd5: nbd_connect_uri: enter: uri="nbd+unix://?socket=/tmp/tmp.sHet2Luahj" libnbd: debug: nbd5: nbd_connect_uri: event CmdConnectUnix: START -> CONNECT_UNIX.START libnbd: debug: nbd5: nbd_connect_uri: transition: CONNECT_UNIX.START -> CONNECT.START libnbd: debug: nbd5: nbd_connect_uri: poll start: events=4 libnbd: debug: nbd5: nbd_connect_uri: poll end: r=1 revents=4 libnbd: debug: nbd5: nbd_connect_uri: event NotifyWrite: CONNECT.START -> CONNECT.CONNECTING libnbd: debug: nbd5: nbd_connect_uri: t...
2012 Aug 27
0
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
Ivan, Thanks for working on the patch. It looks good to me except for the removal of the Transition class: > (1) Should I completely remove Transition and create a map structure in State (input, state) to replace them? Yes, please remove the Transition class and create a map structure in State instead of TransitionSet. Thanks -Anshu On 8/25/2012 6:42 AM, Ivan Llopard wrote: > Hi...
2019 Sep 11
4
[PATCH nbdkit] tests: Convert some tests to use nbdsh instead of qemu-io.
Very much a work in progress as there are still many tests using qemu-io which are candidates for conversion. You'll notice at the end of test-full.sh that the new test has some duplicated code which looks as if it ought to be refactored into a Python function. When I tried to do that, I got loads of strange Python problems which may indicate bugs in nbdsh itself or problems with my
2012 Aug 29
1
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
On 28/08/2012 00:21, Anshuman Dasgupta wrote: > Ivan, > > Thanks for working on the patch. It looks good to me except for the > removal of the Transition class: > > > (1) Should I completely remove Transition and create a map structure > in State (input, state) to replace them? > > Yes, please remove the Transition class and create a map structure in > State instead of TransitionSet. Sure. Please, take a look at the new pat...
2011 Apr 19
2
Markov transition matrices , missing transitions for certain years
Hi all, I am working for nest box occupancy data for birds and would like to construct a Markov transition matrix, to derive transition probabilities for ALL years of the study (not separate sets of transition probabilities for each time step). The actual dataset I'm working with is 125 boxes over 14 years that can be occupied by 7 different species, though I have provided a slimmed down portion...
2012 Jun 28
3
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
...n of column numbers. >>>>> >>>>> Great. Looks good to me. >>>>> >>>>>> IMO, it wil be nice to keep it alive for performance comparisons. >>>>> Given the overall performance >>>>>> is rather determined by transition searches on the current state, >>>>> for small DFA tables may not be a win >>>>>> and it may still be the case for greater ones. >>>>> I agree; let's keep it around for now. >>>>> >>>>> -Anshu >>>>>...
2012 Jun 27
0
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
...and I fixed the violation of column numbers. >>>> >>>> Great. Looks good to me. >>>> >>>>> IMO, it wil be nice to keep it alive for performance comparisons. >>>> Given the overall performance >>>>> is rather determined by transition searches on the current state, >>>> for small DFA tables may not be a win >>>>> and it may still be the case for greater ones. >>>> I agree; let's keep it around for now. >>>> >>>> -Anshu >>>> >>>> --- &gt...
2001 Jul 09
3
transitions in R
Hi, All. I'd have a set of data in an array: process <- c( 5 , 7 , 4 , 1 , 4 , 1 , 4 , 1 , 4 , 4 , 1 , 5 , 4 , ...) and I'd like to know the number of transitions in this data. I calculate transitions as the number of times a number follows another number. thus, something like this would be a 1 deep transition: 1 --> 1 : 10% (and actual number of 1 --> 1 occurrences) 1 --> 2 : 2% 1 --> 3 : 23% ... 2 --> 1 : 2% 2 --> 2 : 8% (etc.) of...
2015 Oct 15
2
Operand bundles and gc transition arguments
...timizer work well around calls with deopt state (e.g. be able to inline through calls with deopt state). Currently a "non-rewritten" `gc.statepoint` call (i.e. before RS4GC has run, without explicit relocations) carries two categories of information: 1. Deoptimization state. 2. GC Transition args and StatepointFlags. Once we have relatively stable[1] support for operand bundles upstream, LLVM will be able to carry deoptimization state directly on calls and invokes using a `"deopt"` operand bundle. This will obviate reason (1) for keeping non-rewritten `gc.statepoint` s i...
2011 Oct 20
1
Constructing the transition pair using loop function and paste()
Hi all, I'd like to thank those who helped me with my previous loop function question with agents/events. I have solved the problem with the advice from this community. I have now moved on to the next step, which requires me to find all the transition pair within an event. A sample data and the R commands I've written are as follow: x <- c('A','D','F','H','N','A','C','H','F','D','F','F','H','K','G','D','D...
2012 Jun 26
4
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
...dInsnClass >>> and I fixed the violation of column numbers. >>> >>> Great. Looks good to me. >>> >>>> IMO, it wil be nice to keep it alive for performance comparisons. >>> Given the overall performance >>>> is rather determined by transition searches on the current state, >>> for small DFA tables may not be a win >>>> and it may still be the case for greater ones. >>> I agree; let's keep it around for now. >>> >>> -Anshu >>> >>> --- >>> Qualcomm Innovatio...
2016 Jan 15
5
[v3,11/41] mips: reuse asm-generic/barrier.h
On Thu, Jan 14, 2016 at 01:29:13PM -0800, Paul E. McKenney wrote: > So smp_mb() provides transitivity, as do pairs of smp_store_release() > and smp_read_acquire(), But they provide different grades of transitivity, which is where all the confusion lays. smp_mb() is strongly/globally transitive, all CPUs will agree on the order. Whereas the RCpc release+acquire is weakly so, only the two...
2016 Jan 15
5
[v3,11/41] mips: reuse asm-generic/barrier.h
On Thu, Jan 14, 2016 at 01:29:13PM -0800, Paul E. McKenney wrote: > So smp_mb() provides transitivity, as do pairs of smp_store_release() > and smp_read_acquire(), But they provide different grades of transitivity, which is where all the confusion lays. smp_mb() is strongly/globally transitive, all CPUs will agree on the order. Whereas the RCpc release+acquire is weakly so, only the two...
2012 Aug 24
0
[LLVMdev] [llvm-commits] [PATCH] Refactoring the DFA generator
...ch. It should be ok now. > Thanks Anshu! > > I've recently added more functional units to our Schedule.td and the > generation time became painfully long. In fact, the main problem was > in writeTableAndAPI(). I propose another patch to fix it: > - Fixed memory leaks. > - Transitions are attached to states. > > I've regenerated the DFA table of Hexagon and everything is ok. > Please review it. I had a few comments about the design change that you're introducing with the patch: This patch adds multiple points of control for adding a transition: there'...
2017 Aug 28
5
"Improvement with the R code"
Hello, I am trying to implement a formula aij= transition from state S_i to S_j/no of transition at state S_i Code I have written is working with three state {1,2,3 }, but if the number of states become={1,2,3,4,......n} then the code will not work, so can some help me with this. For and some rows of my data frame look like checkdf=data.frame(c...
2009 May 07
2
for loop vectorization
...code is trying to make a Q matrix for a multidimensional state space with specific conditions. thanks Mira tmp = 0:(maxvals[1]) for(i in 2:nchars) { tmp <- outer(tmp, 0:(maxvals[i]), FUN="paste", sep=".") } states = tmp stateidx = array(1:length(states), dim=dim(states)) transition <- matrix(data=0, nrow=length(states), ncol=length(states)) findstatedim <- function(x) which(stateidx==x, arr.ind = TRUE) manhattandistance <- function(x,y) sum(abs(findstatedim(x)-findstatedim(y))) for(i in 1:length(states)) { for (j in 1:length(states)) { if (manh...
2017 Aug 28
0
"Improvement with the R code"
Hi, I think you overthought this one a little bit, I don't know if this is the kind of code you are expecting but I came up with something like that: generate_transition_matrix <- function(data, n_states) { #To be sure I imagine you should check n_states is right at this point transitions <- matrix(0, n_states, n_states) #we could improve a little bit here because at step N+1 source is dest from step N #but it would not be as readable...