Displaying 20 results from an estimated 900 matches similar to: "Logistic regresion - Interpreting (SENS) and (SPEC)"
2008 Oct 13
4
Fw: Logistic regresion - Interpreting (SENS) and (SPEC)
Dear Mr Peter Dalgaard and Mr Dieter Menne,
I sincerely thank you for helping me out with my problem. The thing is taht I already have calculated SENS = Gg / (Gg + Bg) = 89.97%
and SPEC = Bb / (Bb + Gb) = 74.38%.
Now I have values of SENS and SPEC, which are absolute in nature. My question was how do I interpret these absolue values. How does these values help me to find out wheher my model is
2008 Oct 13
1
Logistic Regression - Interpreting SENS (Sensitivity) and SPEC (Specificity)
Hi
Hi I am working on credit scoring model using logistic regression. I havd main sample of 42500 clentes and based on their status as regards to defaulted / non - defaulted, I have genereted the probability of default.
I have a hold out sample of 5000 clients. I have calculated (1) No of correctly classified goods Gg, (2) No of correcly classified Bads Bg and also (3) number of wrongly
2013 Feb 18
1
INSESGAMIENTO DE ESTIMADORES DE REGRESION
Muy buenas tardes,
les escribo con el fin de saber si alguno de ustedes, me puede dar una guia
de como
generar una simulacion para ilustrar el insesgamiento de los estimadores B0
y B1
de regresion lineal simple
lo he logrado hacer para un tamaño de muestra fijo
pero no he podido hacer las iterciones.
En particular lo que requiero es hacer la simulacion que me grafique
para varios diferentes
2013 Mar 06
2
regresion lineal
Saludos a todos.
Tengo problemas para encontrar la funcion que te permite generar la formula de la regresion lineal entre dos variables y la linea de tendencia en el gráfico de dispersion de puntos, lo que si puedo realizar es el gráfico con los puntos distribuidos en los 2 ejes pero lo demás que mencioné no se como ingresarlo.
Saludos,
Gabriel Antonio Trujillo Paucar
Estudiante de Biologia
2004 May 03
0
multinomial regresion, nls
Hi,
Does R have any functions implementing such multinomial regression:
(S_t^A,S_t^B)~MN(N_t-Y_{t-1},P_t^A,P_t^B)
where MN(n,p_1,p_2) is multinomial distribution with parameters n, p_1, p_2.
Here P_t^A and P_t^B are nonlinear functions from predictor variables and
parameters which need to be estimated.
Here A and B are used for notation, they are not parameters.
My second question is about
2013 Feb 20
0
INSESGAMIENTO DE ESTIMADORES DE REGRESION (Lex B)
Hola Alexander
Quizá esto te pueda ser útil
reg<-function(a,b,sigma,x){
data<-a+b*x+rnorm(length(x),0,sigma)
lm<-lm(data~x)
c(lm$coefficients[1],lm$coefficients[2])
}
zz<-replicate(1000,reg(1,2,0.5,100,c(1:100)))
hist(zz[1,])
Paco
2008 Jan 07
1
help on log-gamma regresion model with R
Hii all, may I introduce myself. my name is Putro Nugroho i'am astudent of Gadjah Mada University, i'am doing on my final exam about Parametric Regression Model with gamma and log-gamma regression model. I have a problem about the syntax program on R because it doesn't work with gamma distribution with log link function. when I use zelig package it doesn't work when the data is
2011 Jul 07
1
deming regresion to make 2 variables comparable
Hi,
I have a dataset which has var1 from 1 sourse and var2 from 2 different
methods. I need a new variable such that var2 values from both methods can
beused as 1 variable.
I believe deming regression can be used to do this. I just don't know how to
do it.
My data looks like:
idvar1var2method1var2method2
11.22.1NA
21.62.4NA
31.52.2NA
41.3NA2.8
51.6NA3.1
61.4NA2.7
Please help.
Sincerely,
2004 Oct 28
2
Weighted regresion using lm
Hi:
Could anyone help me to clarify this: are the weights normalized inside lm
function (package:stats) before applied to the error term? For example:
>lm (cost ~ material, weights=quatity, data=receipt)
will lm normalize quatity such that sum(quatity) = 1? I traced to lm.wfit and
then the weights get transferred into a precompiled FORTRAN module so I can't
figure out. Thanks!
2009 Mar 18
2
Three Parameter FRECHET Distribution
Dear R Helpers
Which package is available for estimatine the parameters of three parameter FRECHET distribution. Also, how to generate the random numbers for Frechet using these three estimated parameters.
Thanking in advance
Maithili
2009 Aug 27
2
Comparing and adding two data series
Dear R helpers
I have two series A and B as given below -
A <- c(2, 2, 1, 3, 7, 3, 3, 1, 14, 7, 31)
B <- c(0.0728,0.9538,4.0140,0.0020,2.5593,0.1620,2.513,0.3798, .0033,0.2282, 0.1614)
I need to calculate the total in dataset B corresponding to the numbers in dataset A i.e. for no 1 in A, I need the total as 4.0140+0.3798 (as 1 is repeated twice)
for no 2, I need the total as
2010 May 26
1
regresion mixta
Hola a tod en s,
estoy trabajando con modelos de regresión mixta con el paquete "nlme",
concretamente con la función "lme". Una vez que hago mi modelo y el
summary del mismo obtengo por ejemplo la significación (valor p) de la
variable independiente, así como el valor del AIC para comparar mi
modelo con otro similar, pero no sé cómo obtener un valor del grado de
ajuste de la
2009 Mar 16
1
Fw: Fitting GUMBEL Distribution - CDF function and P P Plot
Dera R Helpers,
I am re-posting my query.
Please guide me.
Maithili
--- On Fri, 3/13/09, Maithili Shiva <maithili_shiva at yahoo.com> wrote:
I am trying to fit the Gumbel distribution to a data. I am
using lmom package. I am getting problem in Cumulative
Distribution Function of Gumbel distribution as I am getting
it as a series of 0's and 1's thereby affecting the
P P
2009 Dec 04
2
writing 'output.csv' file
Dear R helpers
Suppose
M <- c(1:10) # length(M) = 10
N <- c(25:50) # length(N) = 26
I wish to have an outut file giving M and N. So I have tried
write.csv(data.frame(M, N), 'output.csv', row.names = FALSE)
but I get the following error message
Error in data.frame(M, N) :
arguments imply differing number of rows: 10, 26
How do I modify my write.csv
2009 Aug 27
2
Fw: PROBLEM - - COMPARING AND COMBINING two DATASETS
Dear Sirs,
?
At the outset I sincerely apologize for reproducing my query to you. I also thank all of you for the solution you had provided. It has worked on the actual data I am working with.
?
However, there is this peculiar problem which I had realized only after I had obtained my results.
?
e.g. in the example I had attached
?
A?<-?c(2, 2, 1, 3, 7, 3, 3, 1,?14, 7, 31)
B?<-
2009 Dec 01
2
Calculation of Central Moments
Dear R helpers
If for a given data, I need to calculate Mean, Standard Deviation, Mode, Median, Skewness, Kurtosis, is there any package in R, which will calculate these moments?
Individually I can calculate these, but if there is any function which will calculate these at a stretch, please let me know.
Maithili
The INTERNET now has a personality. YOURS! See your Yahoo! Homepage.
2009 Feb 06
2
Matrix Multiplication
Hi R helpers,
I have two matrices A and B of the order (4 * 5) and (5 * 3) respectively. How to multiply these two matrices to obtain resultant matrix of the order (4 * 3).
Thanks in advance
With regards
Maithili
2007 Jun 05
1
Problem to park the call with #700
Hi all,
I have a problem to park the call with #700 when the SIP phone and the
asterisk PBAX run on the same machine.
Call parking works well if the SIP phone that I use is on a remote pc in
comparison with the asterisk on the which it is registered. If the
sipphone is in the same pc where asterisk is installed the command #700
doesn't work, and in the asterisk's CLI I can see no
2008 Oct 07
3
How to validate model?
Hi!
I am working on scorecard model and I have arrived at the regression equation. I have used logistic regression using R.
My question is how do I validate this model? I do have hold out sample of 5000 customers.
Please guide me. Problem is I had never used Logistic regression earlier neither I am used to credit scoring models.
Thanks in advance
Maithili
2006 Sep 20
3
sendmail security
hi
all
i am using sendmail mail server, i have configured
SASL+TLS+MailScanner+Spamassasin+.Procmail and its
working fine, but there is one problem when i am doing
telnet to my server on 25 port and using "mail from "
command to send mail by any user like abc at gmail.com or
any user @mydomain then sendmail is not able to verify
sending user , so plz help me how can i verify the
real