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i want to plot a 2D surface color map plot

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Joseph
Joseph 2014-9-30
评论： Image Analyst 2014-10-1
I have a data set of CO concentration in the atmosphere for different altitudes according to the the latitude. I want to plot a 2D surface colormap for CO concentration for latitude and longitude. How can i do that?
all data is stored in one file lets say CO_DATA.and their sizes are:
altitude Size: 150x1
latitude Size: 32024x1
concentration Size: 150x32024
with dimensions mentioned above. so CO_DATA(i,j,k)= CO_DATA(latitude,altitude,concentration) so i->lat, j->altitude, k->concentration limits for latitude are min_lat= -85.2100 and max_lat= 86.6800 with 0.01 increment. limits for altitude are min_alt= 0.5000 and max_alt= 149.5000 with 1 increment. limits for concentration are min_con=-999 and max_con= 0.2640. so,i want to plot a color map that shows different concentrations with different colors in a 2D plot for altitude vs latitude. I attached a pdf file of an example plot to this question. Thank you
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Image Analyst
Image Analyst 2014-10-1
What do you mean by surface? There are no surface in there like MATLAB defines surface, which is a 2.5-D perspective rendering. All I see in the PDF document are flat 2D pseudocolored images. So what do you want: colroed 2.5D surface or images?

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回答（2 个）

Chad Greene
Chad Greene 2014-9-30
Use imagesc or pcolor. Before plotting you may wish to set concentration(concentration==-999)=NaN;
Image Analyst
Image Analyst 2014-9-30
I'd use imshow(). You can use imagesc() or image() also. With any of those 3, be sure to call colormap() with a colormap that you like. And you'll need to set up your tick marks, otherwise they're in pixels. I would not use pcolor() - I don't like that because it does not plot the last row or column of your array (just try it with a very small array and see for yourself).

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