poisson data

  1. J

    Count data and exposure

    Hi, I have seven categories, 'monday','tuesday','wednesday'... Each category contains count data, however I have a different number of observations on each day - some days have 10 observations, some 12, some 21. I want to test to see if the day of the week has an influence on the count and...
  2. L

    Before to making a regression

    Hello I want to ask you, before to making a regression should we understand which distribution follow the datas? Let's take an example: if the data have a poisson distribution, then I will run a Poisson regression? If the data follow a gaussian then one should use...
  3. S

    data.table manipulation for poisson model setup

    I am cross posting from stackoverflow.com....no ideas there so far! I am working with a large dataset of a fishing fleet and I need to format it for a poisson regression and other count models. See below for a subset of the data. The count variable is 'days'. p1:p3 are indicator variables for...