Treatment of Missing Data. R package?

More Paolo Giordani's questions See All

Circular plots for showing shared knowledge?

I have to show data about shared uses of medicinal plants in different ethnic groups. I wonder if circular plots could be an option for this kind of data or not. And if yes, how to arrange...

09 October 2017 9,691 7 View

Kriging with sampling units allocated on a triangle grid?

Do you know about any pros vs cons in interpolating (with a kriging or with other kind of approaches) a variable collected in a survey area with a triangle shape and with its sampling units...

06 July 2014 6,888 14 View

Methods for estimating epiphytic lichen biomass?

Does anyone know about protocols for estimating the biomass of epiphytic lichens and/or mosses in forest ecosystems?

31 December 2013 5,046 4 View

R Script for adonis() with more levels of nestedness

We have a design with several levels of nestedness: lichen species richness sampled at N vs. S expositions on trees located on northern and southern versants in different macroregions. We have...

07 August 2013 8,225 12 View

Is there any recommended statistical approach for analysing data from BACI sampling designs?

I am always confused on how to treat properly the data from Before After Control Impact design? What should I take into account?

02 March 2013 5,869 7 View

What would you suggest to obtain reliable interpolations of a response variable if the study area is characterized by a complex geomorphology?

How to run spatial models in heterogeneous areas? Are there methods for taking into account e.g. the "basin" as a predictor?

10 November 2012 6,875 13 View

Is it possible to estimate with Horwitz-Thompson the number of networks from an Adaptive Cluster Sampling?

Together with the estimations of other parameters (mean, total etc.), is it possible, using Horwitz-Thompson estimators, to estimate the actual number of networks (cluster of adjacent sampling...

09 October 2012 2,677 0 View

Could you suggest proper statistical methods for detecting spatial-temporal variability?

What is the best method for formally testing the temporal variation against the one due to environmental and spatial matrices? Is there any kind of partial RDA, partial mantel tests or something...

09 October 2012 4,735 8 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

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 View

What is involved in morphological changes of SEM images of a substance?

In the sem analysis of CaCO3 nanaoparticles, the morphology images showed spherical shaped particles but the proposed morphology for these type of nanoparticles is trigonal. I prepared the...

01 March 2021 1,960 4 View

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

How to define tie constraint between rigid body and another part in dynamic explicit model of Abaqus?

Hi dear researchers I connected a rigid body into the part of my structure by tie constraint and then I added displacement to rigid body, in static general step every thing is fine and these two...

28 February 2021 3,442 2 View

Rand R Wilcox

Attached is a recent paper on this issue. The citation is

Wilcox, R. R. (2011). Comparing two dependent groups: Dealing with

missing values Journal of Data Science, 9, 1--13.

The R package WRS (Forge) contains a function for applying it. Details and illustrations can be found in

Wilcox, R. R. (2012). Modern Statistics for the Social and Behavioral Sciences: A Practical Introduction