Dear volunteer:
I am a graduate student of medcine in china.And now,I am devoting myself to
constructing a nomograms of bladder cancer.I want to do it with
R-project.However, I do not know how to construct a nomograms with R-project.I
want to get yours help,thank you! I wish you can tell me the operating procedure
of the R-project.
And I apologize for my english,it is poor,sorry!
truly yours
ding ding
[[alternative HTML version deleted]]
On Mar 25, 2010, at 8:54 AM, ?? wrote:> Dear volunteer: > I am a graduate student of medcine in china.And now,I am devoting myself to constructing a nomograms of bladder cancer.I want to do it with R-project.However, I do not know how to construct a nomograms with R-project.I want to get yours help,thank you! I wish you can tell me the operating procedure of the R-project. > And I apologize for my english,it is poor,sorry! > truly yours > ding dingIf you are referring to a regression model based nomogram to be used for prediction, see the nomogram() function in the 'rms' CRAN package by Frank Harrell. Also, if you go to rseek.org and search using the keyword 'nomogram' you will find this and some other functions that provide related functionality. HTH, Marc Schwartz
On 25-Mar-10 13:54:38, ???? wrote:> Dear volunteer: > I am a graduate student of medcine in china.And now,I am devoting > myself to constructing a nomograms of bladder cancer.I want to do it > with R-project.However, I do not know how to construct a nomograms with > R-project.I want to get yours help,thank you! I wish you can tell me > the operating procedure of the R-project. > And I apologize for my english,it is poor,sorry! > > truly yours > > ding ding > [[alternative HTML version deleted]]Do you mean the sort of thing that can be found at http://www.nomogram.org ? (there is one there for bladder cancer) If so, that is simply a "form-filling" type of front-end to an algorithm behind the scenes, which calculates the risk. The real work lies in establishing the algorithm. Certainly, R can be of great help in this, but it is not possible to indicate which parts of R may be needed to acheieve it: that will depend on the data you have available. The front end (filled in by the user) can be constructed using (amongst other possibilities) the tcltk package. First, you need to get a good working knowledge of R. Good places to start are: http://www.stats.bris.ac.uk/R/manuals.html --> An Introduction to R http://www.stats.bris.ac.uk/R/other-docs.html --> R for Beginners --> Using R for Data Analysis and Graphics - Introduction, Examples and Commentary --> Simple R --> Practical Regression and Anova using R Even before that, you will need to decide what statistical methods (regardless of software) you will need in order to establish the models which will form the basis of your nomogram. Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <Ted.Harding at manchester.ac.uk> Fax-to-email: +44 (0)870 094 0861 Date: 25-Mar-10 Time: 14:25:13 ------------------------------ XFMail ------------------------------
Gabor Grothendieck wrote:> On Thu, Mar 25, 2010 at 10:43 PM, Frank E Harrell Jr > <f.harrell at vanderbilt.edu> wrote: >> (Ted Harding) wrote: >>> http://www.nomogram.org >>> >>> They call this sort of interface "nomogram" too, and you can have >>> a go at the one they offer for bladder cancer. This is not a >>> graphical nomogram in the sense that you describe, rather it is >>> a form-filling interface with boxes into which you insert >>> information, and then press the button. >> It is very curious that a site named nomogram.org would not contain a single >> nomogram. I have pointed this out to the author of the site, who maintains >> that disagreements with dictionaries are inconsequential. >> > > It is strange although I think that in certain areas of medicine its > common to use the term nomogram to mean the model underlying the > nomogram as opposed to its graphical representation. > > For example, in the following discussion the authors seem to be using > nomogram merely to denote any model that does not involve forming > discrete levels of the inputs in the way that forming risk groups > (high risk group, low risk group, etc.) would: > > http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2777059/ >Gabor, It is not very common to use it in that manner although I have seen it a few times. But it is never correct, even according to a medical dictionary: http://medical-dictionary.thefreedictionary.com/nomogram Frank -- Frank E Harrell Jr Professor and Chairman School of Medicine Department of Biostatistics Vanderbilt University