Problems with legend using imagesc

Question

Robert 2016-10-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/305663-problems-with-legend-using-imagesc

评论： Robert 2016-10-4

lut_Classified.txt

I have the following code, I have adapted it from another code and I think that is where I am getting stuck.

basically I have a 35x43 matrix of numbers 1-6 and NaNs. I want to plot is as a map using imagesc with different colours for each number (1,2,3,4,5,6). I have attached the data, and my code is below.

Thanks in advance for any help

figure(6)
subplot(1,2,1)
imagesc(lut)
title('Distribution of Different Land Use Types in Australia')
ylabel('Longitude')
xlabel('Latitude')
caxis([0, 6])
myColorMap = jet(6);
myColorMap(1,:) = 1;
colormap(myColorMap);
M = jet(6); 
hold on
L = line(ones(6),ones(6));
set(L,{'color'},mat2cell(M,ones(1,6),3))
[legh,objh,outh,outm] = legend('First','Second','Location','Southeast');
set(objh,'linewidth',200);
legend(1,'Forest',2,'Shrubland',3,'Savanna',4,'Grassland',5,'Agricultural',6,'Barron');
grid on
ax = gca
ax.GridAlpha = .2
ax.XTick = [5 10 15 20 25 30 35 40];
ax.YTick = [5 10 15 20 25 30];
ax.XTickLabel = {'118^{o}E','123^{o}E','128^{o}E', '133^{o}E', '138^{o}E', '143^{o}E','148^{o}E', '153^{o}E'};
ax.YTickLabel = {'13^{o}S','18^{o}S','23^{o}S','28^{o}S','33^{o}S','38^{o}S'};
ax.TickLength =[0.0 0.0]

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Answer 1

KSSV 2016-10-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/305663-problems-with-legend-using-imagesc#answer_237259

在 MATLAB Online 中打开

Replace

   legend(1,'Forest',2,'Shrubland',3,'Savanna',4,'Grassland',5,'Agricultural',6,'Barron');

with

legend('Forest' ,'Shrubland', 'Savanna','Grassland' , 'Agricultural' ,'Barron');

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KSSV 2016-10-4

在 MATLAB Online 中打开

Try

image(lut)

instead

imagesc(lut)

Robert 2016-10-4

在 MATLAB Online 中打开

This does not fix the problem either.

I am pretty sure the answer lies within these lines

caxis([0, 6])
myColorMap = jet(6);
myColorMap(1,:) = 1;
colormap(myColorMap);
M = jet(6); 
hold on
L = line(ones(6),ones(6));
set(L,{'color'},mat2cell(M,ones(1,6),3))