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Questions related to R

Is distance-based redundancy analysis suitable for an experimental design without replication?

I want to investigate the relationship between differences in coral physiological variables based on euclidean distances and seawater environmental variables using DISTLM and dbRDA in PRIMER, but...

20 April 2020 3,809 1 View

Model specification for moderation in multilevel model with R?

I've got longitudinal data from a psychological experiment and try to model the data using R package lme4. My dependent variable y is continuous and is measured at eleven occassions. Each...

14 April 2020 6,681 4 View

Which modelling technique to predict corona virus trends in future?

Hi, I am working on time-series data for the last 2 years. However, I have never used forecasting models. I want to enhance my statistical skills. As corona is all around us, I was thinking to...

30 March 2020 7,553 6 View

Material from Single cell RNA seq data analysis with R, anyone has and can share with me?

Hi everyone! I found a very interested course in YouTube, that mention this link to get the info and more related materials: https://www.csc.fi/web/training/-/scrnaseq but the link is not working...

24 March 2020 9,010 3 View

Spatial autocorrelation for standard distribution models?

Hello! I am lookinng to use a large brown bear telemetry dataset to create a standard distribution model using MaxEnt and Wallace (R package). I currently have over 50,000 GPS points from 17...

01 March 2020 6,827 3 View

How to generate a ROC-Curve for multilevel regression models?

Dear colleagues, Does anyone know, how to build a ROC-Curve and a AUC-Value concerning multilevel logistic regression models using R or Mplus. I would be very grateful for any articles,...

27 February 2020 9,062 3 View

P-values for Odds Ratio in R or Mplus?

Dear collegues, Does anyone know, how I can generate a p-value for an Odds Ratio using R or Mplus concerning a multilevel (multiple/simple) logistic regression model? Thank you very much in...

27 February 2020 3,900 4 View

Do you have any suggestion about constrained estimation of mixed models using lme4 package of R?

I would like to use the lmer function of the lme4 package to estimate the random part of the model given the coefficients of the fixed part (which have been estimated in a previous stage using...

25 February 2020 1,799 5 View

How do you make your analysis scripts 'reviewable' when there is a lot of bulky code repititions?

Hey everyone! How do you make your code readable for other people when there are long chunks of code which you repeat a lot (e.g. the same fancy figure for 10 DVs)? My current solution: I...

13 February 2020 631 1 View

How to change tunit in VariogramST (R)?

Hi there, I am trying to use VariogramST function in R, for spatial-temporal kriging. The values I am working on, are monthly based; while in the function VariogramST, the predefined "tunit" is...

28 January 2020 6,147 3 View

What type of EDA one should do before starting modelling in a longitudinal study?

Hi everyone, I would like to know how do you conduct EDA on a longitudinal study. For example, If I want to study the impact of pred1 (categorical - 3 levels) and pred2 (continuous) on the...

22 January 2020 4,846 3 View

Any algorithm/R package for Bayesian network causal inference of binary data?

I have a dataset of 150 samples of 60 binary variables. The pcalg binCItest results are not impressive and i can not find a straightforward way to do this using bnlearn or catnet. I appreciate if...

17 January 2020 982 5 View

How to calculate True Skill Statistic (TSS) from ENMeval R package output?

I used ENMeval R package to produce my species distribution model with algorithm "maxent.jar". I hope to calculate TSS for my binary map output from generated from maxSSS. However, I am unsure...

13 January 2020 2,095 3 View

Interpretation of interaction in the mixed effect model?

Hi, I have categorized 3 my time points (ftime0, ftime1, ftime2) and treatment type (access_typeAVF, access_typeAVG). Treatment is given after time point 0 (or baseline). Serials (subject) are...

06 January 2020 7,787 5 View

R 3D plot with centered axis ?

I want to represent a series of results computed from y = f(x1, x2, x3), with x1, x2 and x3 being in the [-2, +2] range. For now, I use the "scatter3d" package, and an example of a resulting...

22 December 2019 5,092 4 View

What is Spatial auto-correlation in ecology, when it good to consider and when it should be avoided?

auto correlation is daunting for early career researcher, what is limit to say something is auto correlated [

17 December 2019 6,355 3 View

Variation partitioning - Is there a all -encompassing function/package in R?

I am a bit frustrated looking for a competent function doing variation partitioning (e.g. on linear model output) it should be able to tick the following boxes A) calculate all overlaps and "pure"...

05 December 2019 9,416 3 View

Interaction terms and singularity errors?

Hi, I am currently trying to produce a linear regression model. I have used hierarchial regression stechniques to produce a multivariable model. I have then looked for interaction terms and added...

04 December 2019 4,255 3 View

How To Convert Snp haplotype Data Into 0,1 Matrix? Which software or package is better?

Hi everybody I want to convert HapMap Snp haplotype Data Into 0,1 Matrix so that I can use it in other works. I appreciate your help. Best regards

03 December 2019 3,409 4 View

Is segmented beta regression possible in R?

Hi, I'm trying to apply segmented regression to a response variable that is bounded by 0 and 1, however I am struggling to interpret the error I have encountered. Reproducible example in R: data1

28 November 2019 3,226 12 View

Finding the rows that will divide the columns into the correct groups?

I have 200 samples, each one has measurements of the same 600 proteins. The samples are from 3 groups: before cancer, after cancer, no cancer. I want to find the right proteins, any combination of...

22 November 2019 3,585 3 View

How to plot a 3-way interaction (linear mixed model) in R?

Hi everyone, I am running a linear mixed model in R, using the lme-function. The following variables are used: Y ... Outcome (continuous) IV1 ... Time (categorical: 0, 1, 2, 3) IV2 ... Group...

14 November 2019 3,952 7 View

How to apply fuzzy K-means with spatial constraints in R?

Hello. I am looking for a solution in R to apply spatially-constrained clustering using fuzzy K-means (fuzzy c-means). I came across the spatialClust package, and was wondering whether anyone may...

31 October 2019 4,782 2 View

How to choose the right distance method ?

Hi everyone, I have some issues to determine how to pick correctly the right distance calculation method in R. I have two datasets : one containing habitat variables (worldclim data, so...

16 October 2019 7,638 5 View

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