Does anyone have any tips on how to calculate net reclassification index (NRI) in R?

09 May 2016 1 2K Report

Hi All

I've generated a series of ROC curves in R and have initially compared performance using DeLong's test. I am also interested in computing NRI, but have had no prior experience in this. Any tips???

Joseph V Moxon

Cheers Stephan - Will check it out.

Badges
Science topic

More Joseph V Moxon's questions See All

Installing Climate Data Operators?

Hello, I am trying to run Cygwin terminal but I experience a problem of cyproj-13.dll not found as below. I even checked on Cygwin but it is not there. Kindly help.

11 June 2024 4,502 0 View

How do I publish my research work here?

I need information on this question

21 May 2024 1,285 1 View

I design a unit cell metamatarial but the array structure does not behave like the unit cell, what could be the possible problem?

I created a unit cell in CST, and after that I created array from the structure, but my array structures do not behave like the unit cell, a have a DNG material in the unit cell and a SNG in the...

17 May 2024 4,700 6 View

Is there a glucose-free MEM-alpha medium commercially available?

For an assay I am planning to run I require a glucose-free MEM-alpha medium, I've seen papers where researchers state they use glucose-free MEM-alpha but they do not provide a supplier or catalog...

02 May 2024 4,004 0 View

IPSC to motor neurons?

Hi I have following questions regarding iPSC-derived motor neurons: 1. Is it possible to dettached mature motor neurons using accutase and reattach them on coated plates (matrigel, geltrx etc)?...

01 May 2024 3,047 0 View

Clarification on calculating LogID50?

Can someone please clarify the correct way to calculate LogID50 using the Reed and Muench method. Using the example values below: 10^-1 100% positive 10^-2 100% positive 10^-3 100% positive 10^-4...

01 May 2024 4,113 0 View

Does the alkyl chain between the carbonyl group and the C=C bond convert this group to saturated?

Find attached file

30 April 2024 6,886 0 View

What is the physical reason that hydroponic plants can be planted closer together then soil-based plants?

In other words, is it simply the nutrient supply that makes soil plants much less effective when they are closer together or does it have to do with the roots interfering with each other. If it's...

16 April 2024 6,718 4 View

Does the alkyl chain decrease the impact of the ring on C=O stretching IR?

Find the attached file.

15 April 2024 6,749 1 View

No cytokine or complement activation in my PBMC stimulation assay?

Hi I`m trying to detect immune response in vitro with my nanoparticle (virus-like particles) incorporating SARS-CoV-2 Spike protein. I inoculated quite a lot of nanoparticle in PBMC and inoculated...

09 April 2024 174 2 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

If we are using snowball sampling technique, how do we justify the true representativeness of the sample statistically? is there any statistical test?

Are there any statistical methods to justify your sampling technique using SPSS or AMOS?

05 August 2024 9,153 4 View

How to report results of Generalised Linear Mixed Models in a journal article?

Hi everyone, If you have written or come across any papers where Generalised Linear Mixed Models are used to examine intervention (e.g., in mental health) efficacy, could you please share the...

04 August 2024 4,130 4 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Posthoc test lettering in JAMOVI?

Does anyone know of a module for the JAMOVI software that is capable of generating mean separations using the classic letters based on post hoc results (e.g., Tukey test)? If, as I believe, such...

31 July 2024 3,333 4 View

Which statistical test should we use?

N=6 Comparing pre and post test likert scale responses. Participants are mix of practicing & preservice teachers.

30 July 2024 7,233 4 View

All math can be explained by iterator of code?

all math can be traversed by code? all math can be translate to code?

26 July 2024 9,530 0 View

Standard curve of H2O2?

Hi, I need to prepare a standard curve of H2O2 to evaluate the primary products of oxidation. H2O2 I have is 35%. How do I prepare a stock of H2O2 10 microlitere. If s.o has experience, I would be...

26 July 2024 3,460 2 View

Is factor analysis with quantitative variables possible?

Good morning, I would like to conduct a factor analysis for my work at the municipal level on a panel datae with variables such as income per capita, unmployement rate, percentage employed in a...

25 July 2024 5,104 4 View

How do I access .vcf files without an R statistical package?

I am currently working on a mendelian randomization study, and I have downloaded the datasets needed from the ieu opengwas project (mrcieu.ac.uk) in .vcf format. I do not have access to an R...

19 July 2024 2,342 5 View