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    Check if dependency between two variables is linear

    Hi, Thanks for your response and typo you found. I'm working with very large data sets and it's not possible to post it here, but the example mimics the real data i have. Sorry for the misunderstanding.
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    Check if dependency between two variables is linear

    Hi, Thanks for your reply. Are you an R user? I'm asking, because may be it would be easier for me to understand the concept using R code examples. The regression Y on X2 is not linear (from the plot 2 you provided it doesnt look like linear, i.e. the majority of the points are far from the...
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    Check if dependency between two variables is linear

    I've posted the question: https://stats.stackexchange.com/questions/424202/check-if-dependency-between-two-variables-is-linear/424215?noredirect=1#comment791817_424215 There are a number of values for dependent variable (let's name it Y) and the same number of corresponding values for...
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    Statistical test to find association between two variables

    Thank you for the explanation and useful link. I see that my explanation about dependence of the replicates within same location was not well although. Let's forget about plants and substrates for a time. Suppose we've measured height of multiple people in two countries (e.g. 50...
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    Statistical test to find association between two variables

    Thanks a lot! Yes, i have the 25 replicates for one location and 25 for another location. What is 2^2 full factorial design? I guess the first 2 means two factors - location and substrate. Right? What the second 2 means? Do you recommend me to use linear regression (lm function in R)?
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    Statistical test to find association between two variables

    1) Totally i have about 50 points. For each point i have one number corresponding to plant's abundance (discrete variable) and one nominal variable (substrate type). One half of my points (points=blocks=samples) are in one geographical location and other half of the points are in another...
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    Statistical test to find association between two variables

    I'm dealing with ecological data. Broadly speaking, i've counted the plant abundance (discrete variable) in a number of points (small blocks,one number for each point).There were about 50 of a such points totally. For each point (block) we determined a substrate type (nominal variable with the...
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    Input data for Canonical Correspondence Analysis (CCA)

    I'm going to conduct Canonical Correspondence Analysis (CCA). In the tutorial I've found at: http://rfunctions.blogspot.com/2016/11/canonical-correspondence-analysis-cca.html environmental data are discrete variables with multiple levels within each variable (please check env.csv file in the...
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    Hello

    Hi! Thanks a lot! I'll do my best.
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    Hello

    Hi, Thanks! But i'm a bit confused, which topic i have to choose: -Statistics -Statistical Research -Biostatistics Is there somewhere detailed description for each mentioned topic?
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    Hello

    Hello, I have a number of unreplied questions on Cross Validated website. I'm wondering, is there correct way to post them here?
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    Hello

    Hi! Thanks. The 2nd year of my project is going now. I'm the most interesting in comparative genomics, metagenomics and genome wide association studies as well.
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    Hello

    Hi there! I'm new here. I'm still learning bioinformatics...