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Questions tagged [multivariate-testing]

Multivariate testing (aka multi-variable testing) is hypothesis testing in the context of multivariate statistics

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Combining sapply with show

I have run the ADF test (using ur.df from the urca package) on my multivariate zoo object. Now the results are stored in a large list, when I use the show() function, there are too many results…
Olorun
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multivariate analysis in R

I am looking to identify packages that allow for multivariate analysis.. e.g., multiple dependent variables (e.g., Y1, Y2, Y3, Y4) fit to the same set of predictors, in R. I know it can be done through multivariate multiple regression with the lm…
blast00
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Extract residuals from adonis function in vegan package

I am using the adonis function in the vegan package to determine effects of different environmental factors in forest plant community composition in different regions. I would like to first use adonis to remove the region effect, this is, to fit a…
Alicia Valdés
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Multiple Factor Analysis (MFA) with R using FactoMineR

I have encountered a problem with the MFA in FactoMineR. I am working with a data set containing physical, chemical and microbiological continuous variables measured in tomato plants, taken from 2 different treatments and at 3 time points. I have…
Emma Hernandez Sanabria
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Parallel computing in R (Windows): changing code from foreach %do% to foreach %dopar%

I have written a code to run several time-series rolling-regressions for multiple securities. Since the number of securities is more than 10,000, and having more than 200 rolling windows for each security, the runtime for a sequential set-up (using…
Mayou
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MCA in FactoMineR

I'm drawing a MCA plot using FactoMine R. I have data tables that look like this: Met Aa Fn Pg Pi Tf Smut Ssob An Csput C1 High N.S. N.S. N.S. High N.S. High High N.S. C2 High N.S. …
Emma Hernandez Sanabria
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Google Content Experiments for whole part of the site

I want to run an A/B-test or an experiment for whole part of the site. For example on my /blog/ page, where one variation would have a newsletter form and other variation a free ebook download button. The problem is that I have to use a full URL…
ddofborg
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Comparing multivariate distributions

I have a set of multivariate instances and I need to extract a representative set from these instances; for instance if I have 100,000 multivariate instances, I want to extract 1000 instances that would be representative of the original…
words_of_wisdom
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Statistical procedure decision

I have two problems in hand : I have a dependant variable, lets say GDP, and many other independant variables. I need to know what procedure I can use to find which among the IVs are leading or lagging indicators. I have develop the model in SAS…
Abhishek Ray
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What is the ellipse’s centroid written as a numerical vector?

I used proc corr to find pearson and plot scatter with ellipses of 70% and 90%. to finde ellipses's centroid is it the mean value of variables that were use in this process? i tried proc corr in sas studio and it provide me pearson Im expect to find…
Not AtAll
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multiple GLMs in a for loop

I am looking to estimate parameters for a large set (274) of correlated response variables which follow a NB dist. The goal is to use the parameters for a generalized linear model for each of the variables with a two level categorical predictor. I…
AA1989
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Find T^2 quantiles for multivariate data in R

I have a T^2 statistic for a partitioned multivariate dataset with 2 variables, found by calculating a paired comparison test. I want to compare my T^2 number with the T^2_{.95, p, n-1} value, without using a table. Is there a function or package in…
honeyBunchesOfFloats
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What is the equation for multivariate kernel density estimation techniques?

I was reading about non-parametric kernel density estimation. http://en.wikipedia.org/wiki/Kernel_density_estimation For uni-variate where D = 1, we can write like For Multivariate Kernel density estimation (KDE), more preciously for d=3 and X =…
jquery404
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Which Multivariate Statistic Test / Algorithm for Testing Statistical Significans

I'm looking for a mathematical algorithm to proof significances in multivariate testing. E.g. Lets take website tests having 3 headlines, 2 images, 2 buttons test. This results in 3 x 2 x 2 = 12 variations: h1-i1-b1, h2-i1-b1, h3-i1-b1, h1-i2-b1,…
Manuel
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Dist and hclust functions outputting unexpected/incorrect outputs

I have been attempting to use R as an alternative to MVSP for cluster analysis and PCA. However, R is giving drastically different outputs from MVSP using all the functions that I've found, including dist, bcdist, hclust and daisy functions. I have…
Mirran
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