# All Questions

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### algorithm Matlab function 'stream2' and 'stream3' use to compute streamline

Can anyone explain how the MATLAB functions: stream2(x,y,z,u,v,startx,starty) and stream3(x,y,z,u,v,startx,starty) compute stream lines from vector data u and v? In the stream2.m file, it calls the ...
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### Reference for dimension reduction techniques

This is a follow-up question to Is PCA appropriate for comparing subsets of panel data?. It turns out that, yes, PCA is appropriate. But there are also many other ways to reduce n-dimensional data to ...
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### Non-significant ANOVA but significant pairwise comparisons: how is it possible?

When I do a 2 (tasktype: slogan vs. product) x 2 (novelty: old vs. new) ANOVA, the interaction and the main effects do not seem to be significant. But when I look at the pairwise comparisons, I see ...
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### How predictor importance in a cluster analysis (in SPSS) affected by dichotomy and multicollinearity?

I want to use a cluster analysis (CA) in SPSS to define different profiles in my dataset. I am using different continuous variables for this, including several neuropsychiatric measures. I am new in ...
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### GLM with categorical predictor on R

I need to do a model with a generalized linear model. my data are thoses : habitat : O or 1, group : 1 or 0 , mortality : yes or no, and the numbers of individuals for each case. (habitat, group and ...