matlab绘图中legend的终极用法

matlab绘图中legend的终极用法

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legend有时候挺烦人的，尽管大多时候挺好用。

基本数据：

data = rand(25)+repmat(1:25,25,1);
H = plot(data);

基本用法：

legend({'str1','str2','strn'});

高级用法1：指定legend显示的位置：

legend({'str1','str2','strn'},1);

legend({'str1','str2','strn'},2);

legend({'str1','str2','strn'},'Location','SouthEast');

可选的位置不少：

North：Inside plot box near top
South：Inside bottom
EastI：nside right
West：Inside left
NorthEast：Inside top right (default)
NorthWest：Inside top left
SouthEast：Inside bottom right
SouthWest：Inside bottom left
NorthOutside：Outside plot box near top
SouthOutside：Outside bottom
EastOutside：Outsideright
WestOutside：Outside left
NorthEastOutside：Outside top right
NorthWestOutside：Outside top left
SouthEastOutside：Outside bottom right
SouthWestOutside：Outside bottom left
Best：Least conflict with data in plot
BestOutside：Least unused space outside plot

一般，用'Best‘比较不错

高级用法2：指定显示某几条曲线的legend：

方法1：复杂到吐血

例如你有25条曲线，想显示其中1，6，11，16，21的legend，则

for i = [2:5 7:10 12:15 17:20 22:25]
set(get(get(H(i),'Annotation'),'LegendInformation'),'IconDisplayStyle','off');
end
legend('1','6','11','16','21');

方法2：简单到郁闷

H = plot(data);
legend(H([1 6 11 16 21],'1,'6','11’,'16','21');

高级用法3：legend横排

hl = legend(H([1 6 11 16 21],'1,'6','11’,'16','21');
set(hl,'Orientation','horizon')

高级用法4：不显示方框：

hl = legend(H([1 6 11 16 21],'1,'6','11’,'16','21'); set(hl,'Box','off');