Hi Sayantan
Since there is no information about the specification of the variable consider an example where you want to plot a contour of temperature variation over a particular year as well as a particular day of that year.
You can take that seasonal variation as one variable say ‘x’ and diurnal variation as another variable say ‘y’ and you also require one more variable say ‘z’ to define the relationship between ‘x’ and ‘y’.
Then you can use the ‘contourf’ function (refer following link for function documentation) to plot your filled contour.
