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Questions related to R
How to create a mean model per genotype from μCT scans (dicom or tiff input format) coming from different animals so we can later compare the two different population mean models. Currently the...
01 September 2021 1,226 1 View
I'm performing a time series analysis with multiple breakpoints in R. I managed to identify three breakpoints using the procedure suggested in strucchange package but I'm struggling to get the...
17 August 2021 2,035 3 View
When solving Ordinary Differential Equations in time using, say R, is common to find ourselves in a part of the parameter space that does not allow for correct solutions. For simple models it is...
12 August 2021 6,398 7 View
Help please, I use the function to change the font, as in this example: https://davidgohel.github.io/flextable/reference/font.html require ("gdtools") #> Loading required package: gdtools fontname
30 July 2021 1,045 3 View
For network meta-analysis, in order to calculate anticipated absolute differences, I have seen papers generating anticipated absolute differences for treatment for x number of years. However the...
16 July 2021 1,933 3 View
I was pleased to learn that jamovi now has an editor that allows one to use code. https://blog.jamovi.org/2018/07/30/rj.html But to be truly useful, IMO, it would have to allow one to generate...
14 July 2021 6,552 6 View
Hi folks, Imagine I have a dataset of bacterial abundance at specific degrees of temperature. Each line is a different bacterial species and each column is the abundance at a specific...
07 July 2021 6,449 7 View
Is there a way to flip the skull? I need the skull to be faced in the opposite direction. I am using this code string (in r-studio): plotRefToTarget(PCAf$shapes$shapes.comp1$min, mshf). mshf is...
22 June 2021 3,241 4 View
Hello, everyone, thank you for clicking this post. So, I want to analyze the effect of Corporal Punishment Myth on Corporal Punishment behavior (measure by CTS-PC). However, I want to know if the...
17 June 2021 3,652 3 View
Currently, I'm trying to learn the zero-inflated count model. So, I read about the model in the "pscl" package of R. It said that: "The formula can be used to specify both components of the model:...
11 June 2021 1,783 3 View
I am unable to install dmetar package of R. Any suggestions how can I download it.
09 June 2021 7,744 7 View
I'm using a cox proportional hazards regression to analyze latency data, i.e. time until behavior x occurs. The model I'm running is fitted with the "coxme" package in R (which is a wrapper to the...
08 June 2021 7,807 8 View
Hi, I'm analysing my survey data to test whether A affects B using the ordinal logistic regression model in R ("polr" function). In my case, both A (the explanatory variable) and B (the response...
31 May 2021 2,303 5 View
Dear all, We are preparing an explorative pupillometry analysis of previously elicited eye tracking data (Tobii T1750). Since we have no experience with pupillometry, we would be very grateful for...
26 May 2021 3,210 4 View
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 9,326 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 8,378 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 1,597 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 7,402 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 4,188 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 8,614 7 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 6,228 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 6,928 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 7,128 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 1,705 3 View