How do I find the collinearity between predictors in a cox regression using R software?

03 March 2014 1 9K Report

Actually, I want to find if there is a relationship among my explanatory variables.

You can use variance inflation factors for this; Wikipedia has an article on them. They can be estimated from the model matrix. I use the attached function with glm() and glmer() objects - not sure about cox models specifically.

Badges
Science topic

More Sweta Gunputh's questions See All

Tight binding disperion relation from wannier90_hr.dat file?

I have done ab-initio calculation using vasp and also have done wannier90 calculation and got the wannier90_hr.dat file which contains all the tight-binding hopping terms which are required to...

31 December 2020 6,445 2 View

What are the current research trends in Cognitive Science?

To be more specific, in the research area of Adult Cognitive Disorder. Your answer would be very much helpful. Thanks in advance.

09 August 2020 8,599 8 View

Can anyone tell me what are the leukemia cell lines which express both CD20 and CD30 antigen?

Generally few leukemia cell lines express either CD20 or CD30.But I want to work on the cell line which are expressing both CD20 and CD30.

04 February 2018 5,048 1 View

After a fish fin explant cells are radiating and growing up to few days. Then suddenly the monolayer starts shrinking and cells are dying. Plz help.

Hi friends!!! I am stuck with a fish fin explant culture. Each time I am trying an explant from fin tissue, cells will radiate nicely and monolayers can be seen. We found them growing for few days...

14 May 2017 9,888 2 View

How to measure relative fluorescence between two different regions on confocal microscope?

I want to quantify the difference in fluorescence intensity between two areas in a sample

08 July 2013 5,581 3 View

What is the minimum amount of rna needed for a one step pcr when using Quantinova SYBR green kit?

I am new to PCR. I am extracting RNA from osteoblast cells and getting very low amount of rna. However i need to do pcr with 12 primers and i will be able to use 20 ng or less per reaction. Is it...

01 January 1970 6,805 4 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View

How to choose ANN number of hidden layers and nodes?

Hello, Could you please share any interesting research explaining how to choose the number of hidden layers and nodes per layer in case of regression problems using ANN? Thank you, any help would...

01 March 2021 6,200 3 View

Can anyone provide the Support vector regression code structure of LIBSVM MATLAB or python ?

Please, if Gaussian Parameter optimization is possible in this code structure

28 February 2021 278 3 View