How I can produce a colour contour map?

I have a data set in the form M=(180*360*12) where 180 is the latitude, 360 longitude and 12 is the averaged data for 12 months for 32 years. i want to plot contour map of it. i have proceeded this way, can somebody look into it and let me know what i am doing wrong here.

[lon lat]=Meshgrid(linspace(min(lon),max(lon)),linspace(min(lat),max(lat)));
contourf(lon,lat,M(:,3));

Thanks

[Hydro]

Thanks Wolski,

I need to deduct my computed mean (the one mentioned earlier) from my original data which is in order (180*360*384). 384 is the number of months (32 years).

Can you please suggest a way forward?

[Sean de Wolski]

So the mean for each month?

And each slice is monthological? Jan, Feb,...Dec, Jan, Feb,...Dec?

[Hydro]

Here is my complete coding what i did so far,

R=reshape(sst,180,360,12,32);% reshaping the data in 12*32 form
M=mean(R,4);
contourf(M(:,:,3));

I reshape my data to get the average for each month through 32 years...so for all january i averaged it across 32 years...and same for the other. now I plot the averaged only (you helped me out with this) now i need to deduct this mean from each of its corresponding month to get the anomalies. Then I need to plot the anomalies.

Answer 1

[Sean de Wolski]

contourf(M(:,:,3)) % all rows, columns and third page

You should also consider using contourm. Otherwise your lat/lon data will not be represent properly unless you project it into x/y using mfwdtran

[Hydro]

Here is all what I need to do however, i am really struggling and i need to finish this in couple of hours. I would really appreciate any help in this regards, in fact, you will save my life.