title: df.corr() command in python
body: <p>I want to find the correlation between the columns of a dataframe in python. I would like to ask which correlation coefficient provides df.corr(). Correlation R or something else?</p>
  <p>For example, df.corr(method='spearman', min_periods=1) computes spearman rank correlation, and my question is when the parenthesis is empty what python computes ?</p>
  <p>Thanks,
  Dimitris</p>