问题描述
如何在 MatLab 的等值线图中更改多边形边界的颜色? (同时保持多边形内的颜色)。下面的可重现代码。
MapLatLimit = [41 48];
MapLonLimit = [-74 -66];
nestates = shaperead('usastatelo','UseGeoCoords',true,'BoundingBox',[MapLonLimit' MapLatLimit']);
datawithNaN = [30 20 30 NaN 40 50 NaN NaN];
% Here replace NaNs with a number (treat as category):
datawithNaN(isnan(datawithNaN)) = 0;
datawithNaN = num2cell(datawithNaN);
% Here I create a color map,using white for NaN (category = 0);
mycolormap = [ 1 1 1;...
.4 .1 .9;...
.3 .2 .8;...
.2 .3 .7;...
.1 .4 .6];
[nestates.datawithNaN] = deal(datawithNaN{:});
densityColors = makesymbolspec('polygon',{'datawithNaN',[0 50],'FaceColor',mycolormap});
mapshow(nestates,'displayType','polygon','SymbolSpec',densityColors)
解决方法
通过添加属性 'EdgeColor'
,您可以将颜色更改为任何颜色。在下面的示例中,我选择了红色 r
。更多颜色选项:MATLAB Documentation: ColorSpec (Color Specification)。颜色也可以定义为数组形式的 RGB 三元组矩阵 [r g b]
:
哪里,
r
→ 红色强度范围从 0 到 1。g
→ 绿色强度范围从 0 到 1。b
→ 蓝色强度范围从 0 到 1。
densityColors = makesymbolspec('Polygon',{'datawithNaN',[0 50],'FaceColor',mycolormap,'EdgeColor','r'});