title: How do I use python 2.7.3 to work on statistics such as max,min,std,pdf,cdf?
body: <p>I have a bunch of big files (say 20,000 rows and 4 columns), using which I want to calculate mean, max, min, standard deviation(std), probability distribution functions(pdf), histogram and so on. I have a text file using which I would like to get mean, max, min, std, pdf, and histogram plot for values in the fourth column of the text file!</p>
  
  <p>The first column of text file is Name of Model, second column is Year, third column is Day, and fourth column is Value. Each column is separated by comma.</p>
  
  <p>Thank you for your help.</p>