I am trying to look at correlation between different variables. I used MATLAB's corrplot function and got the attached results. The function's documentation doesn't provide detailed description of the plot. How do I interpret these results? What do the blue bars show? Why are they the same for both results A & B? What does the red line show? What more can I say about the two results? Apart from no correlation in A & Positive correlation in B)? my data matrix is 64 x 2: what are the values on the $y$ and $x$ axes of the plot?
Best Answer
The scatter plots shows paired variables with the least-squares regression line, a linear fit that matches the pattern of the paired variables (equal to the correlation Coefficients). The histograms of each single variable appear along the plots diagonal, this shows the range of values for the variable, revealing the underlying shape of distribution.