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Recent content by graph

  1. G

    Math problem: derivative of correlation coefficient

    I think we are getting closer. since you are taking sums and averages I would think that X represents more than just one function. I would think that it represents a sequence of functions..otherwise what is there to sum over or take an average. So do we have functions X1(w),X2(w),...,Xn(w)...
  2. G

    Math problem: derivative of correlation coefficient

    what do you get when you compute d/dx [avg(x)] this makes no sense to me. what is your avg(x)? is it ...writing it in LaTeX form... \sum_{i=1}^n\frac{x_i}{n} "the sum of the observations divided by the sample size" ? Is x some function of another variable? like x=x(t) is x a function...
  3. G

    Math problem: derivative of correlation coefficient

    is this... 2shared.com/file/3231662/140d231c/CXY.html you c(x,y)? put 3 w's if front of the link...I cant post a link since i have fewer than 15 posts....ug
  4. G

    Math problem: derivative of correlation coefficient

    What exactly are you summing over? From what you have written you are summing over x and differentiating w.r.t. x ... that doesn't seem right. what exactly is x? What is your ultimate goal here?
  5. G

    Maths will kill the evolution of every biological structure.

    it doesn't hold for imaginary numbers.