Displaying 20 results from an estimated 6000 matches similar to: "On the probabilistic distribution"
2004 Jun 11
1
probabilistic neural networks
Hi,
I'm working on a classification problem and one of the methods I'd
like to use are neural networks. I've been using nnet to build a
classification network. However I would like to have the probabilities
associated with the prediction.
Are there any implementations of probabilistic neural networks available
in R?
thanks,
2012 May 15
1
Probabilistic aggregation
Hello, I'm a new user to R and need some help coding a mathmatically simple
aggregation of normal distributions. I have three normal distributions:
A ~ N(8.51, 4.24^2)
B ~ N(7.57, 3.62^2)
C ~ N(10.84, 6.59^2)
with correlation coefficients of:
rho(AB) = 0.710
rho(AC) = 0.263
rho(BC) = 0.503
and I want to simulate Z = A + B + C, showing the results on a plot and
fitting a distribution to the
2018 Jul 19
1
choosing between probabilistic and boolean prefixes for terms
Hi all,
public-inbox allows searching for git blob names (e.g. "badc0ffee")
in patches. Initially, I chose to use add_prefix for probabilistic
terms, since I assumed it could be a superset of what boolean
searching offered. Unfortunately, it doesn't seem to be the case
because stemming is interfering.
So switching to boolean filtering seems to work; and it is
fine for mechanical
2009 Dec 18
1
?OT: Probabilistic Simulation
Sorry this may well be defined as Off Topic. I apologize in advance.
I am interested in performing what I think would be a probabilistic sensitivity simulation. I've done some crude ones before in excel but I'm wondering if R can help me do it more effectively?
I have a set of theoretical variables for simplicity lets use (what I think) is an easier example: I have a peg and a hole
2012 Jun 06
1
Data scientist // Berlin-based startup using probabilistic models in ecommerce
*Fluidshopping is a Berlin-based startup working on a customer analytics
tool for online retailers.
Customer Lifefitime Value (CLV) is the mythical 'magic number', the amount
of money a particular customer will ever bring in. Knowing your CLV makes
it trivial to:
- optimize marketing spend for different inbound channels.
- identify your highest value customers,
- identify those in danger
2006 Apr 16
9
how to do probabilistic packet loss in kernel?
Hi,
I am using iproute2 to setup fowarding, adding routes like "ip route add 192.168.1.3 via 192.168.1.2"
I was wondering where in the kernel I can insert probabilistic packet loss only for forwarded packets? So that for instance I can drop 5% of all forwarded packets?
I don''t need help with the actual code, just need help finding where to insert this code :)
Thanks!
George
2008 Nov 20
0
Update of X2R (with FishGraph) at CRAN, 20 Nov 2008
X2R is a bundle of three software libraries for passing complicated data
structures from Fortran, C/C++, or AD Model Builder to R. An update has
been sent to CRAN and should be available from mirrors shortly. From the
menu at the left of the CRAN home page, look under Software / Other.
We also have updated FishGraph, a compatible set of R functions for
examining output from fish population
2008 Nov 20
0
Update of X2R (with FishGraph) at CRAN, 20 Nov 2008
X2R is a bundle of three software libraries for passing complicated data
structures from Fortran, C/C++, or AD Model Builder to R. An update has
been sent to CRAN and should be available from mirrors shortly. From the
menu at the left of the CRAN home page, look under Software / Other.
We also have updated FishGraph, a compatible set of R functions for
examining output from fish population
2016 Jan 11
0
JOB: Oceana, Data & Fishery Analyst - Global Fishing Watch
Oceana Data & Fishery Analyst - Global Fishing Watch
http://oceana.org/employment-opportunities/oceana-data-fishery-analyst-global-fishing-watch
The Oceana Data and Fishery Analyst position located in Washington, DC will be the lead Oceana data analyst for an exciting new web-based tool called Global Fishing Watch (GFW). GFW is designed to make information on global fishing patterns
2013 May 17
0
[R-pkgs] Probabilistic neural network (PNN)
Dear useRs,
I am pleased to announce the release of the new package PNN.
PNN implements the algorithm proposed by Specht (1990). It is written in the R statistical language. It solves a common problem in automatic learning. Knowing a set of observations described by a vector of quantitative variables, we classify them in a given number of groups. Then, the algorithm is trained with this datasets
2013 May 17
0
Probabilistic neural network (PNN)
Dear useRs,
I am pleased to announce the release of the new package PNN.
PNN implements the algorithm proposed by Specht (1990). It is written in the R statistical language. It solves a common problem in automatic learning. Knowing a set of observations described by a vector of quantitative variables, we classify them in a given number of groups. Then, the algorithm is trained with this datasets
2009 Aug 19
1
Performance measure for probabilistic predictions
Hello,
I'm using an SVM for predicting a model, but I'm most interested in the
probability output. This is easy enough to calculate.
My challenge is how to measure the relative performance of the SVM for
different settings/parameters/etc.
An AUC curve comes to mind, but I'm NOT interested in predicting true vs
false. I am interested in finding the most accurate probability
2005 May 27
2
how to get this kind of binomial distribution simulation number?
hai, I want to perform a simulation like this仯伜
Suppose that I have one population ,it's size is 500, is composed of x,y
and z. The probability of x, y and z is respectively is 0.3, 0.5, 0.2. I
wan to simulate a new same size population based ratio of x, y and z, how
can I get and assess the number of x, y and z. ?
luan
Key Laboratory for Sustainable Utilization of Marine Fisheries
2008 Jan 15
2
Looking for simpler solution to probabilistic question
Hi
I have two processes which take with a certain probability (p1 and p2) x
number of years to complete (age1 and age2). As soon as thge first
process is completed, the second one begins. I want to calculate the
time it takes for the both processes to be completed.
I have the following script which gives me the answer, butI think there
must be a more elegant way of doing the calculations
2008 Feb 06
2
GLM coefficients
Dear all,
After running a glm, I use the summary ( ) function to extract its
coefficients and related statistics for further use. Unfortunately, the
screen only displays a small (last) part of the results. I tried to
overcome the problem by creating/saving an object "coef" for
coefficients of the model and export/save it e.g. as a cvs document.
While I succed with this operatiion, I do
2013 Oct 31
0
SIAR problem with model running
Hi there,
I am trying to run an MCMC on stable isotope data from certain organisms to
determine their dietary habits in the package SIAR.
I have prepared my data according to Inger, R., Jackson, A., Parnell, A.,
Bearhop, S. : SIAR V4 (Stable Isotope Analysis in R) an Ecologist's Guide
(also better known as 'SIAR for dummies'), which is as follows:
- consumer data table (columns
2008 Feb 07
1
Res: GLM coefficients
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2012 Nov 02
0
Mixed model with multinomial distribution
I would like to run a GLMM on categorical data. In this case the response
data are abundance of insects of 4 trophic groups.
I am unsure whether I need to cbind the categories and run with the model
with family=multinomial4 or family=gaussian.
Also I'm unsure whether I should use lme4 package or MCMCglmm.
If anyone can give me any pointers, I would be most grateful.
I am new to R and mixed
2006 May 24
5
Joining variables
Hello,
If I have two variables that are factors or characters and I want to
create a new variable that is the combination of both what function can
I use to accomplish this?
Ex.
Var1 Var2
SA100055113 19851113
And I want
NewVar
SA10005511319851113
Thanks in advance.
Cameron Guenther, Ph.D.
Associate Research Scientist
FWC/FWRI, Marine Fisheries Research
100 8th Avenue S.E.
St.
2005 Nov 21
3
Warning message help
I am trying to great a new column of effort data from an existing vector
of gears used.
It is a simple code where
effort[Gear==300]=(DIST_TOW*7412)
effort[Gear==301]=(DIST_TOW*7412)
The code appears to work for some of the data but fails for others and
inserts a NA value
I also get this warning message
Warning message:
number of items to replace is not a multiple of replacement length
Can