search for: preiszler

Displaying 7 results from an estimated 7 matches for "preiszler".

Finding Indices of Vector
2008 Nov 09
2
Finding Indices of Vector
Lets say I have a vector as follows xx<-rnorm(20) How could I find the indices of the vector<0? Thanks Meir ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir@itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<-----------------...
Calculating Sensitivity, Specificity, and Agreement from Logistics Regression Model
2008 Dec 18
3
Calculating Sensitivity, Specificity, and Agreement from Logistics Regression Model
...predictor variables x1 and x2. I then do a logistic regression model fit as: fit<-glm(Y~x1+x2,family=binomial). Are there functions in R than calculate the Sensitivity, Specificity , and Agreement of the model "fit"? Thanks Meir ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir@itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<-----------------...
Support Vector Machine
2009 Feb 23
2
Support Vector Machine
Hi, I would like to try using a Support Vector Machine on a classification problem that I'm dealing with. Does such a package exit in R? Thanks Meir ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir@itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<-----------------...
Looking for function tree.matrix
2008 Sep 15
1
Looking for function tree.matrix
Hi, Does anyone know where such a function can be found? Thanks Meir ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir@itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<-----------------...
Problem with misclass function on tree classification
2008 Sep 14
1
Problem with misclass function on tree classification
...quot;R does not find the function pred1.tree". Is this function included in the tree package? If so it was not in my download. Is this a bug? Do you know of a fix? Thanks for your help Meir <<clus1.r>> <<tree.r>> ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir at itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<--------------...
Selecting numeric data from a data frame
2008 Oct 07
1
Selecting numeric data from a data frame
Hi I have a data frame containing numeric and factor data. I want to extract the numeric data only. How can this be done? Thanks Meir ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir@itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<-----------------...
Decision Function of Support Vector Machine
2009 Feb 24
0
Decision Function of Support Vector Machine
...example to a C program, and use it. I know that the classifer is of the form WTX+b where W is defined by the support vectors. I did not see that W vector is output from svm. If am I right how should I compute it? Is b output? Thanks Meir ******************************************** Meir Preiszler - Research Engineer I t a m a r M e d i c a l Ltd. Caesarea, Israel: Tel: +(972) 4 617 7000 ext 232 Fax: +(972) 4 627 5598 Cell: +(972) 54 699 9630 Email: pmeir@itamar-medical.com Web: www.Itamar-medical.com ********************************************* ----------------8<-----------------...