Displaying 20 results from an estimated 1000 matches similar to: "I have a question on nomograms."
2011 Jun 02
2
Removal of elements from nomograms
The rms package includes the nomogram function, which generates a list
object that can be passed to plot for graphical production of nomograms.
I would like to remove the "linear predictor" line in the graph, which
means (I suspect) removing it from the nomogram output object. I've
looked at the nomogram output object, but it is not clear to me if or
how it might be edited to
2011 Apr 28
1
Nomograms from rms' fastbw output objects
There is both a technical and a theoretical element to my question...
Should I be able to use the outputs which arise from the fastbw function
as inputs to nomogram(). I seem to be failing at this, -- I obtain a
subscript out of range error.
That I can't do this may speak to technical failings, but I suspect it
is because Prof Harrell thinks/knows it injudicious. However, I can't
2010 Oct 03
2
A problem about nomogram--thank you for you help
dear professor:
I am a doctor of urinary,and I am developing a nomogram of bladder tumor.Now I have a problem about this.
I have got the result like this through analysing the dataset "exp11.sav" through multinominal logistic regression by SPSS 17.0.(the Sig. is high,that is good ,it is just aexperimental data )
Parameter Estimates
Ya
B
Std. Error
Wald
df
Sig.
Exp(B)
95%
2013 Feb 14
1
Nomogram after Cox Random Effect (frailty) model
Dear R-users,
I am a novice R-user with some experience in using the RMS package for taking nomograms after various survival models.
This time, I am trying to plot a nomogram after a Random Effects Cox, implemented by the "coxme" package. My questions are:
1. Is it possible to take a nomogram directly after the coxme survival function?
2. If not is there a way to take the linear
2010 May 19
1
Nomogram with multiple interactions (package rms)
Dear list,
I'm facing the following problem :
A cox model with my sex variable interacting with several continuous variables : cph(S~sex*(x1+x2+x3))
And I'd like to make a nomogram. I know it's a bit tricky and one mights argue that nomogram is not a good a choice...
I could use the parameter interact=list(sex=("male","female"),x1=c(a,b,c))... but with rcs or pol
2010 Dec 09
1
error in lrm( )
Dear Sir or Madam?
I am a doctor of urology,and I am engaged in developing a nomogram of bladder cancer. May I ask for your help on below issue?
I set up a dataset which include 317 cases. I got the Binary Logistic Regression model by SPSS.And then I try to reconstruct the model
?lrm(RECU~Complication+T.Num+T.Grade+Year+TS)? by R-Project,and try to internal validate the model through
2017 Oct 26
1
nomogram function error
Hi R-help,
?
I have fit a cox ph model to my data, but have beenreceiving an error when trying to fit a model to the nomogram. Here is the codeand corresponding error:
?
?
>nomogramCF = nomogram(cph_age6_40avp4,
+????????????????????lp.at= seq(-10,10,by =0.5),lp = TRUE,
+??????????????????????
+??????????????????????funlabel="5year survival",
2007 Oct 03
1
Nomogram
Hi R users.
I have a model of cox that already it is estimated (I have only the
model estimated, I haven't data), how can I determine a nomogram with
R? Is it posible to do nomograms in Design package? I think that's
only when the model (Cox Regression in this case) is before estimated
in R.
Thanks
2011 May 15
5
Question on approximations of full logistic regression model
Hi,
I am trying to construct a logistic regression model from my data (104
patients and 25 events). I build a full model consisting of five
predictors with the use of penalization by rms package (lrm, pentrace
etc) because of events per variable issue. Then, I tried to approximate
the full model by step-down technique predicting L from all of the
componet variables using ordinary least squares
2011 May 05
7
Draw a nomogram after glm
Hi all R users
I did a logistic regression with my binary variable Y (0/1) and 2
explanatory variables.
Now I try to draw my nomogram with predictive value. I visited the help of R
but I have problem to understand well the example. When I use glm fonction,
I have a problem, thus I use lrm. My code is:
modele<-lrm(Y~L+P,data=donnee)
fun<- function(x) plogis(x-modele$coef[1]+modele$coef[2])
2011 Oct 21
1
cph/nomogram Design/RMS package hazard ratio: interquartile vs per unit
Hello,
I am constructing a nomogram using cph and nomogram commands in Dr.
Harrell's Design/RMS package. The HR that I obtain for dichotomous and
categorical variables are identical to those that I obtain using STATA
stcox. However, the inter-quartile HR I obtain for continuous variables is
obviously different, since STATA gives me HR for each unit (year,
centimeter, etc) like coxph would
2013 Jun 24
2
Nomogram (rms) for model with shrunk coefficients
Dear R-users,
I have used the nomogram function from the rms package for a logistic
regresison model made with lrm(). Everything works perfectly (r version
2.15.1 on a mac). My question is this: if my final model is not the one
created by lrm, but I internally validated the model and 'shrunk' the
regression coefficients and computed a new intercept, how can I build a
nomogram using that
2010 Aug 25
1
modify a nomogram
Hi,
I would like to emphasize ("zoom") the zone of a nomogram where the
probability are > 0.01
(nomogram built with nomogram, Design).
As a consequence, I don't need to draw the part of the "Total points"
axis with score < 60 equivalent in my case to a linear predictor < 4.5
- As far as I know, this is not possible with the arguments of the function.
- Changing
2011 Nov 29
2
Nomogram with stratified cph in Design package-- failure probability
Hello,
I am using Dr. Harrell's design package to make a nomogram. I was able to
make a beautiful one. However, I want to change 5-year survival probability
to 5-year failure probability.
I couldn?t get hazard rate from Hazard(f1) because I used cph for the model.
Here is my code:
f1 <- cph(Surv(retime,dfs) ~
age+her2+t_stage+n_stage+er+grade+cytcyt+Cyt_PCDK2 , data=data11,
surv=T,
2009 Apr 25
3
Nomogram with stratified cph in Design package
Hello,
I am using Dr. Harrell's design package to make a nomogram. I was able to
make a beautiful one without stratifying, however, I will need to stratify
to meet PH assumptions. This is where I go wrong, but I'm not sure where.
Non-Stratified Nomogram:
2011 Nov 30
1
Nomogram with stratified cph in rms package, how to get failure probability
Hello,
I am using Dr. Harrell's rms package to make a nomogram. I was able to make
a beautiful one. However, I want to change 5-year survival probability to
5-year failure probability.
I couldn?t get hazard rate from Hazard(f1) because I used cph for the model.
Here is my code:
library(rms)
f1 <- cph(Surv(retime,dfs) ~
age+her2+t_stage+n_stage+er+grade+cytcyt+Cyt_PCDK2 , data=data11,
2011 Jun 24
1
Competing-risks nomogram
Hi R users,
I'd like to draw a nomogram using a competing-risks regression (crr function
in R), rather than a cox regression. However, the nomogram function provided
in the Design package is not good for this purpose.
Do you have any suggestion.
I really appreciate your help
Many thanks
F.Abdollah, MD
San-Raffele hospital
Milan, Italy
--
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2010 Oct 04
1
I have aproblem about nomogram--thank you for your help
dear professor:
I have a problem about the nomogram.I have got the result through analysing the dataset "exp2.sav" through multinominal logistic regression by SPSS 17.0.
and I want to deveop the nomogram through R-Projject,just like this :
> n<-100
> set.seed(10)
> T.Grade<-factor(0:3,labels=c("G0", "G1", "G2","G3"))
>
2003 Nov 04
2
help with nomogram function
I have fitted a logistic regression model
> failed.lr2$call
lrm(formula = failed ~ Age + task2 + Age:task2, data = time.long,
na.action = na.omit)
using the Design package functions and would like to generate a
nomogram from this model.
the datadist information is generated and stored in
> ddist
time.long$Age time.long$task2
Low:effect 45
2005 May 30
0
Nomogram
I don't think Spencer replied to your message. It wasn't addressed to you. He was replying to a specific post on nomograms. However you might try being less specific as a search on "spatial cluster" gave back
[R] mclust - clustering by spatial patterns http://finzi.psych.upenn.edu/R/Rhelp02a/archive/13474.html
[R] Spatial Clustering