title: Correlation plot between two data frames in R (Correlation heatmap)
body: <p>I have a dataset including several columns and I want to make a
  correlation plot between x and y. X and Y include several variables.
  For example in mtcars data from car library I want to have a
  correlation plot between (mpg, cyl,  disp as X) and  (hp, drat, wt as
  Y). How I can do it that R. Note: I want to have an output like "corrplot" output. The only difference is that I have different variables on x and y axes. Please see the attached file.</p>
  
  <pre><code> library(car)
   data(mtcars)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/B4I6f.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/B4I6f.png" alt="enter image description here"></a></p>