如何在 Matlab 中用空 gridsquares 绘制网格（即显示网格线）

我正在使用 meshgrid 创建坐标矩阵以在欧洲的网格数据中绘制模型输出。数据集为 106 x 103，在没有数据的地方，该值设置为 NaN。

[meshlat,meshlon]=meshgrid(rlat,rlon);
surf(meshlon,meshlat,data(:,:,1)),'linestyle','none';view(2); 

但我实际上希望所有没有输出的网格方块也被绘制出来（所以这张地图中额外的网格方块，包括斯堪的纳维亚......但我希望它们是白色的）：

I'm thinking that I may need to create a third matrix the same size as the meshlat and meshlon and fill it with a number that would correspond to the colour white...plot it, then type 'hold', and plot my map on top? I'm not sure how to specify the white colour though? Or is there another way of doing it?

Here is a simplified version of the problem:

data = magic(4);
data(1,2) = nan;
x = [1,2,3,4];
lat = repmat(x,4,1);
lon = lat';
surf(lon,lat,data);view(2);

You can see the blank space on the left..In this example, I would like to see extra grid lines where the squares would be (if there were no nans in the dataset)

When I tried @Hoki's suggestion, I ended up with grid squares around every 'cell' in the matrix...whether it was filled with a number or a NaN (below) which is not what I originally needed. I wanted just the land masses (that have real numbers, not NaNs to have a gridline around them):

By using the full dataset (in the first image), I plotted the outline of the gridsquares for the landmasses using:

surf(meshlon,meshlat,fulldata(:,:,1),'FaceColor','none','EdgeColor','k');view(2);

Then I plotted my 'coloured' grid squares over that original dataset:

hold on;
surf(meshlon,meshlat,data(:,:,1)),'linestyle','none';view(2); 

Using the simplified example below, the code is:

data = magic(4);
datafull=data;
data(1,2) = nan;
x = [1,2,3,4];
lat = repmat(x,4,1);
lon = lat';
surf(lon,lat,datafull,'FaceColor','none','EdgeColor','k');view(2);
hold on
surf(lon,lat,data);view(2);