contourm plot on the map axes shrinks

Question

Jingwan 2014-6-12

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/133885-contourm-plot-on-the-map-axes-shrinks

回答： Eirik Mikal Samuelsen 2017-3-23

slp.mat

I have a sea level pressure data set (25 x 47 x 262 double). The first two dimensions are latitudes and longitudes. The third dimension is the time. I used the function contourm to plot the contour map of the mean of the data on the map axes using 'mercator' projection, but the plot shrunk and became unreadable. Then I realized I couldn't plot the data for some individual days (i.e. day 252) on the map axes.

But for most of the days, the contourm works.

I also tried to plot the contour map on the normal xy axes, everything worked fine.

The code I used is as follows.

clc
clear all
close all
load('slp.mat')
close all
figure(1)
set(gcf,'Color','w')
axesm('mercator','MapLatLimit',[-40, -25],'MapLonLimit',[140, 152.5])
axis off; framem on; gridm on; mlabel on; plabel on;
setm(gca, 'MLineLocation', 2,'PLineLocation',2,...
    'MLabelLocation',4,'PLabelLocation',4,'LabelUnits','degrees',...
    'MLabelRound',-1,'PLabelRound',-1)
% [c,h] =contourm(lat,lon,mean(slp,3));
% [c,h] =contourm(lat,lon,mean(slp(:,:,[1:251,253:end]),3));
% [c,h] =contourm(lat,lon,mean(slp(:,:,251:254),3));
[c,h] =contourm(lat,lon,slp(:,:,251));
clabelm(c,h)
figure(2)
set(gcf,'Color','w')
axesm('mercator','MapLatLimit',[-40, -25],'MapLonLimit',[140, 152.5])
axis off; framem on; gridm on; mlabel on; plabel on;
setm(gca, 'MLineLocation', 2,'PLineLocation',2,...
    'MLabelLocation',4,'PLabelLocation',4,'LabelUnits','degrees',...
    'MLabelRound',-1,'PLabelRound',-1)
[c,h] =contourm(lat,lon,slp(:,:,252));
clabelm(c,h)
figure(3)
contourm(lat,lon,slp(:,:,252))
xlabel('longitude');
ylabel('latitude');

I don't know what makes the contourm plot fail on some of the data.

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Answer 1

Eirik Mikal Samuelsen 2017-3-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/133885-contourm-plot-on-the-map-axes-shrinks#answer_260001

I have the same problem. Are there any answers out there?

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