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Running a Co-correspondence analysis (ter Braak, C. J. F., and A. P. Schaffers. 2004. Co-correspondence analysis: a new ordination method to relate two community compositions. Ecology 85:834–846.)...
25 January 2017 9,420 1 View
The manual explains how to input environmental variables ~(or factors) and interactions between them but does not explicity explain how to input geographical coordinates. Should I just input...
21 January 2017 5,555 1 View
Hi, I'm doing regression in prediction. But, i would like to get some advice on any package in R to do feature selection specifically using mutual information algorithm? Thank you in advance
16 January 2017 6,073 2 View
I have used a histogram as a density estimator and fitted a spline using R. My understanding is that the spline function gives a cubic spline interpolation, but I did not specify what method to...
16 January 2017 3,271 4 View
I explored different packages (such as mgcv, MCMCglmm, glmmADMB, etc) but they all have limitations. Either they don't allow for zero-inflated, zero-altered distributions or they don't allow...
15 January 2017 1,782 2 View
I want to model VARMA-GARCH of Mcaleer to study volatility transmission between oil and stock market index (bivariate). Is there any available programme in R or Eviews that I could use?
10 January 2017 8,056 3 View
Hi, I have performed a CFA in R using the lavaan package. I used a robust estimator (MLR) because there was a lack of normality in the data. With a sample of 282 and 5 factors to conduct I have a...
08 January 2017 678 5 View
Hello, I would like to check multigroup hypothesis with the help of R Studio/STATA/Mplus Softwares but I would like to read some documents that used a multigroup analysis
06 January 2017 6,835 2 View
I have sampled 6 populations of lizards for which I have presented each lizard with 4 odour treatments. I want to know if lizards flick their tongue less when presented with a control (no odor)...
04 January 2017 608 14 View
All Dears, Happy New Year. I am looking to find a function in R which predict some interpolated / extrapolated numbers among a series of numbers. I have some censuses for 4 months of several...
04 January 2017 816 7 View
There is a huge number of missing data in my study. and the data are all MNAR (Missing not at random), with little MCAR test (p
30 December 2016 5,983 4 View
I tested the effect of pH on the delta 13C isotope change (beginning-end of experiment) in two species. When I do a two-way ANOVA (two factors: pH and species, both with 2 levels), I get a...
14 December 2016 6,187 8 View
Dear all friends I am using naiveBayes function of R for my modeling. I need to categorize my input data into two classifications. Now I am segmenting them by myself, and is not so scientific...
08 December 2016 2,369 4 View
DE analysis was carried out using cufflinks, TAIR10 database, Arabidopsis
07 December 2016 1,740 5 View
Hi together, I'd like to conduct a mixed-design ANCOVA in R with two covariates. I used the afex package to run the ANCOVA: BU_PK_trust_ancova = aov_ez("id", "trust_rating", data2_long, within=...
05 December 2016 7,952 2 View
I have monthly precipitation data for a rain gauge for 30 years and by means of which, firstly I need to carry out gamma distribution model in R studio software and then change the gamma...
02 December 2016 8,318 2 View
I have rapid light curve data (ETR for each PAR value) for 24 different specimen of macroalgae. The dataset has three factors: species (species 1 and species 2), pH treatment (treatment 1 and...
29 November 2016 4,643 7 View
Hi, I am analyzing proportions of volatile compounds in floral scent, by using metaMDS function in r (vegan) but the analysis does not converge. I have tried to increase the number of tries with...
22 November 2016 3,431 3 View
Dear all, I would like to pick your brains for the following problem. I want to combine data on an exposure (thyroid function or TSH) and outcomes from 5 studies. In each study, the outcome is...
22 November 2016 4,635 6 View
Hello everyone, Could someone help me and explain what is the best way to post hoc at PERMANOVA. Thanks, Lucas
21 November 2016 4,401 14 View
Hi everyone,I have a grazing experiment which includes: Two topography(flat vs. slope) In each topography, there are three management type(grazing,mowing,mixed use) In each management type, there...
17 November 2016 3,234 2 View
How do I generate GOF statistics using the R-package fitdistrplus? Here's my data and distributions to compare: Weibull distributions Dist1 - shape: 1.7914 ----- scala: 48236 Dist2 - shape: 2.1406...
16 November 2016 6,083 5 View
I have been working on profit function estimated in seemingly unrelated regression. I need to compute confidence intervals for the price and non-price elasticities estimated. I found some online...
09 November 2016 6,440 2 View
I'm doing goodness of fit test for Clayton copula on a bivariate data but it doesn't seem to work for some pairs. Here is my r codes y= c(0.7305614, 0.4515401, 0.6796660, 1.7711524, 1.0902400,...
09 November 2016 9,078 2 View