Contact experts in R to get answers
1,961 views 1,230 posts
Questions related to R
Hello, I am going to conduct confirmatory factor analysis for two f my validation studies. 1. One is a single factor questionnaire having 10 items. 2. The other one has 15 first-order factors...
24 May 2021 9,387 13 View
I am looking to identify the inflection point in a clear threshold relationship between the site-level density of two trout species that occupy similar niches. It appears to me that a...
23 May 2021 8,402 6 View
I have questions regarding measurement invariance for longitudinal data when analyzing latent variables. I would like to analyze 4 cohorts (grades 3,4,5,6 at baseline) longitudinally over 2 years...
12 May 2021 1,661 15 View
Hello, Background: I am doing a meta-analysis using Cohen's d. I am calculating the effect size of having a higher BMI on social cognition abilities. Some studies have a high BMI group and a...
04 May 2021 7,439 6 View
Hello, I designed a choice experiment of 3 attribute + payment attribute, with support.CEs package. The choice set have 2 improvement alternative (alt.1 and alt.2) + 1 alternative status quo...
23 April 2021 4,214 7 View
I am using the vglm function in R to compute the effect of my independent variable on my dependent variables (ranging from 0 to 5 or -2 to 2). I also receive outputs for my calculations. However,...
23 April 2021 8,647 7 View
For how long period, the cattle remains infective after getting the Pink Eye and when can the animal be safely return to the herd?
23 February 2021 4,316 2 View
I have the following equation, Eating choice (Yes/No)~ Box type (A/B/C). So the question is whether a certain box type affects eating choice in groups of dogs. The eating choice of each member in...
11 February 2021 6,305 9 View
I am running mixed models analyses because I have participants nested in groups. Across the different analyses, I have very different degrees of freedom in the lme output with nlme package (and...
10 February 2021 7,022 3 View
I have been working on a study trying to estimate body mass in mammals using a skeletal proxy in R. My dataset has high phylogenetic signal (Pagel's Lambda = 0.9) and I am interested in removing...
27 January 2021 7,210 3 View
Hi, I have raw data from [HG-U133_Plus_2] Affymetrix Human Genome U133 Plus 2.0 Array that I want to process using the Expresso function for Affymetrix microarrays. My samples include tumor...
23 January 2021 1,769 3 View
Hello there, I am using the robumeta package in R to fit a meta - regression model. One of my categorical moderators has three levels. Everything is dummy coded. AFAIK regression coefficients...
07 January 2021 8,260 3 View
Hi, I am looking for the source code of HSPF model, but i found out that the source code in repositories of HSPF (e.g., https://github.com/rburghol/hspf and https://water.usgs.gov/software/HSPF/)...
02 January 2021 1,475 3 View
Hello! I'm kind of new in using R for doing EFA, CFA, and SEM. I just followed a guide to perform CFA on my data to see how my context fits the ITC-SOPI model in a VR photo-based tour. I used...
24 December 2020 1,950 2 View
I am curious about some details of work of logical operators in R. For example, let we have following expression: A == a & B == b & C == c & D == d &.... and so on. If A == a gives FALSE, will...
20 December 2020 7,499 7 View
I'm using a random-intercept multilevel analysis to model the proportion of hits (from 0 to 1, with two decimals) from my experimental task. All my independent variables included in the model are...
15 December 2020 1,949 16 View
Hi guys, I would love to know how I could go about solving the above question. I currently have 2 different species distribution models, one created with the current climate projection and the...
15 December 2020 1,086 8 View
I have done my analysis in R using the piecewiseSEM package and have got the results but I am unsure how to report it APA style. What values do I report? Thank you in advance!
14 December 2020 3,261 3 View
Hello; I have made a dendrogram with mixed data (numbers, ordered factors and factors) using gower distance (daisy function in R) and cluster analysis with ward.D2 (hclust function in R) for a...
11 December 2020 4,158 2 View
Hello fellow researchers, I am doing a research which involves estimating the parameters of the Cox Ingersoll Ross (CIR) SDE using a Bayesian approach. I propose using the Euler scheme in my...
05 December 2020 8,351 1 View
Hello fellow researchers, I am doing a research in extreme value theory where I have to estimate the parameters of a generalized Pareto distribution using a Bayesian approach. I would really...
05 December 2020 4,915 5 View
Hello, I am working with some longitudinal data resulted from a clinical trial. I have the interaction effect of time and group + random effect of Subject. Time variable consists of 6 timepoint...
30 November 2020 6,712 3 View
Hi everyone, I would like to improve my computational skills in r, particularly in the field of metabolomics (both targeted and untargeted analysis). I think using R will make my life much...
20 November 2020 1,387 7 View
Hi everyone, we need some help with a request from a reviewer. Here's the issue: In our study we investigated the impairment in the ability to recognize facial emotions when a facemask is present...
06 November 2020 1,485 18 View