notation

  1. S

    Anova: Components of variation in population (notation in Doncaster and Davey)

    Hi I am reading Doncaster and Davey's 2007 book. The book lists the appropriate ANOVA/ANCOVA models for combinations of nested and crossed factors. While I think the book to be a great practical asset, I am confused by the authors' notation. For each model they provide an anova table...
  2. trinker

    Math notation break set into n length groups

    I have a vector of length 26 and want to split it into groups of length 5. I can write it in code but what's the math notation for breaking a set up into n length groups keeping the elements consecutively ordered? Using what Bryan Goodrich wrote here...
  3. trinker

    Math notations length of

    I know we use n for length of a vector in many cases such as in the mean formula: Well let's say I have a list of vectors maybe: x = \{a, b, c\} and a = \{1, 2, 3 \}, b = \{4, 2, 3, 6 \}, c = \{14\} I want to talk about the length of x but also about the lengths of (a, b, and...
  4. B

    Logistic Regression - Equation

    Hi! I run a logistic regression, and i know that it can be written as Pr(y=1)=F(a+b_1*x+b_2*z). With y being the dependent variable, a the intercept, b_ the coefficients and x&z the independent variables. Concerning the notation only: Any ideas how I could write this for x and z being...
  5. trinker

    Help writing what I'm doing mathematically

    I am not a mathematician and thus need major help representing my actions mathematically. First I'll explain what I'm doing and then a crack at writing a formula for it. I have time stamps for two codes that look like this (call them code x and y): #code x duration start end 5...