在彩色地图白色中绘制海冰浓度

Question

我有一个包含 lat、lon 和 ice_conc 的 nc 文件。我希望将海冰浓度绘制在方形网格（脚本所做的）上，以白色而不是黄色的阴影，并将开阔的海洋绘制为蓝色。这是我所拥有的：

silo=ncread('ice_conc_201707031200_v2.nc','lon');
sila=ncread('ice_conc_201707031200_v2.nc','lat');
si=ncread('ice_conc_201707031200_v2.nc','ice_conc');

F = scatteredInterpolant(silo',sila',si');

[lox,lay] = meshgrid(-80:0.05:80,-70:0.05:-20);

sii = F(lox,lay);
sii(isnan(sii))=0;

set(groot,'defaultAxesTickLabelInterpreter','latex');  
set(groot,'defaulttextinterpreter','latex');
set(groot,'defaultLegendInterpreter','latex');

close all
ax1 = axes; 

contourf(ax1,lox,lay,sii/100,'LineColor','none'); % do I plot colormap in white for 100% seaice down 
to blue for 0% sea ice??

grid on, axis equal, xlim([10 50]), ylim([-70 -30])

enter image description here

Answer 1

一种方法是创建您自己的颜色图。下面是一个可能的例子：

cmap = colormap(); % your current colormap

n = size(cmap, 1)/2; % change only the second half of the colormap
col = cmap(n, :); % color at the halfway point

for i = 1:3
    % For example linearly interpolate the color between the one at the halfway point and white
    cmap(n:end, i) = linspace(col(i), 1, length(cmap(n:end, i)));
end

contourf(...) % your plot
colormap(cmap) % apply the colormap