How I can produce a colour contour map?

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Hydro 2014-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/166197-how-i-can-produce-a-colour-contour-map

评论： Hydro 2014-12-10

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

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Sean de Wolski 2014-12-10

So the mean for each month?

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

Hydro 2014-12-10

在 MATLAB Online 中打开

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.

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Answer 1

Sean de Wolski 2014-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/166197-how-i-can-produce-a-colour-contour-map#answer_161953

编辑：Sean de Wolski 2014-12-10

在 MATLAB Online 中打开

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

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Hydro 2014-12-10

Questions.pdf

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.

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