Problem using quiver comand

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Jaime de la Mota
Jaime de la Mota 2017-5-16
编辑： Cyril GADAL 2017-5-17
I have two 360*180*12 matrices with meteorological data and it's significance; I want to plot the data and use quiver to draw arrows where that dada is significative:
figure
for i=1:12
subplot(4,3,i);imagescnan(loni,lati,squeeze(double(r4_sat(:,:,i)))'),colorbar;
hold on
subplot(4,3,i);quiver(loni,lati,r4_sat_significative, r4_sat_significative ),colorbar;
This is the code I am triying to use; draw one of the matrices and quiver the other on top; this gives me an error. Can someone please tell me how to represent it properly?

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回答（1 个）

Cyril GADAL
Cyril GADAL 2017-5-16
Hello,
Can you give us the error you obtain ? Thus, you should probably write it this way :
figure
for i=1:12
subplot(4,3,i);
imagescnan(loni,lati,squeeze(double(r4_sat(:,:,i)))')
colorbar
hold on
quiver(loni,lati,r4_sat_significative, r4_sat_significative )
end
Don't forget the end at the end for the loop. Also, be carefull with the double use of colorbar, even if there is probably a way to have two colobar, I don't see why you want ... I assume that the colorbar is for the image you want to plot ?
  2 个评论
Jaime de la Mota
Jaime de la Mota 2017-5-16
It seems that it needs all four components to have the same size, but loni is a vector of 360 longitudes, lati is a vector of 180 latitudes and r4_sat_significative is a 360x180x12. It tells me that r4_sat_significative and loni should have the same dimensions.
Cyril GADAL
Cyril GADAL 2017-5-17
编辑：Cyril GADAL 2017-5-17
I think the error probably comes from the fact you forgot the i in r4_sat_significative :
figure
for i=1:12
subplot(4,3,i);
imagescnan(loni,lati,squeeze(double(r4_sat(:,:,i)))')
colorbar
hold on
quiver(loni,lati,r4_sat_significative(:,:i), r4_sat_significative(:,:,i) )
end
You can keep loni and lati as vectors, it should work.

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