plotting colorcoded points on a map

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Darragh Kenny 2018 年 10 月 24 日
コメント済み: Darragh Kenny 2018 年 10 月 24 日
Hi,
I am trying to plot significant trends in the standard precipitation evaporation index onto a map of Zimbabwe. So far, I am only showing positive and negative trends, but I would like to have a colorcode on each point signifying the magnitude. How do I do that?
clear all;
gridZim=struct2cell(gridZim);
gridZim=gridZim{1};
temp=regexp(gridZim,'\d{1,8}','match'); %here I'm just reading out the gridpoints
for i=1:length(gridZim)
gridpoints(:,i)=str2double(temp{i});
long_lat(i,:)=[gridpoints(1,i)+0.01*gridpoints(2,i) -gridpoints(3,i)-0.01*gridpoints(4,i)];
end
for i=1:length(SPEI12(1,:))
[taub(i) tau(i) h(i) sig(i) Z(i) S(i) sigma(i) sen(i) n(i) senplot(i) CIlower(i) CIupper(i) D(i) Dall(i) C3] = ktaub([SPEI12(:,i) [1:1345].'], 0.05, 0); %checking for significant trends with Mann-Kendall and quantifying the trend with Sen's slope
end
worldmap('Zimbabwe');
bordersm
hold on
long=long_lat(find(h==1),1); %h==1 signifies a significant trend. I just want to plot the gridpoints with a significant trend
latit=long_lat(find(h==1),2);
sen_s=sen(find(h==1));
for i=1:length(sen_s)
if sen_s(i)<0
plotm(latit(i),long(i),'bp')
end
if sen_s(i)>0
plotm(latit(i),long(i),'rp')
end
end
m=worldmap('Zimbabwe');
bordersm
hold on
plotm(long_lat(:,2),long_lat(:,1),sen.') %this is not working

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採用された回答

jonas 2018 年 10 月 24 日

Try this:
scatterm(long_lat(:,2),long_lat(:,1),[],sen_s)
I assume sen_s is the variable you want colorcoded. Adapt the colormap per your preferences.
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Darragh Kenny 2018 年 10 月 24 日
Perfect, thanks!

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