I have been trying to create a contour plot. The data set comprises of 366 units in the X-axis and 216 units in the Y-axis. Hence the axes display values from 0 to 365 and 0 to 215 in the X and Y axes respectively.
I want to label the X-axis to display equally spaced names of 12 months. ie., Jan, Feb, …, Dec, and Y-axis to show only 3 points labelled -30, 0 and 30.
I want to create a line through the points of maxima.
How can I do these?