matlab繪圖中legend的終極用法，去掉legend的邊框 (2013-06-17 16:15:40)轉載▼
標籤： 教育 分類： Matlab學習
matlab繪圖中legend的終極用法
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%持續更新。 當前： 20100108 %
%僅作筆記。 作者： keyflying %
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legend有時候挺煩人的，儘管大多時候挺好用。
基本資料：
data = rand(25)+repmat(1:25,25,1);
H = plot(data);
基本用法：
legend({‘str1’,’str2’,’strn’});
高階用法1：指定legend顯示的位置：
legend({‘str1’,’str2’,’strn’},1);
legend({‘str1’,’str2’,’strn’},2);
legend({‘str1’,’str2’,’strn’},’Location’,’SouthEast’);
可選的位置很多：
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
通常，用’Best‘比較不錯
高階用法2：指定顯示某幾條曲線的legend：
方法1：複雜到吐血
例如你有25條曲線，想顯示其中1，6，11，16，21的legend，則
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：簡單到鬱悶
H = plot(data);
legend(H([1 6 11 16 21],’1,’6’,’11’,’16’,’21’);
高階用法3：legend橫排
hl = legend(H([1 6 11 16 21],’1,’6’,’11’,’16’,’21’);
set(hl,’Orientation’,’horizon’)
高階用法4：不顯示方框：
hl = legend(H([1 6 11 16 21],’1,’6’,’11’,’16’,’21’);
set(hl,’Box’,’off’);
參考文獻

寫兩次就好了。我最初嘗試著寫成legend(‘x’,’y’,’boxoff’)是不行的。
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修改legend的字型：
legend1=legend(‘x’,’y’);
set(legend1,’FontName’,’Times New Roman’,’FontSize’,12,’FontWeight’,’normal’);
修改legend位置：
i=0;%i=0，自動調整最佳位置；i=1，右上；i=2，左上；i=3，左下；i=4，右下；
legend1=legend(‘x’,’y’，i);
20160518
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legend(‘hide’), legend(axes_handle,’hide’) makes the legend in the current axes or the axes specified by axes_handle invisible.
legend(‘show’), legend(axes_handle,’show’) makes the legend in the current axes or the axes specified by axes_handle visible. A legend is created if one did not exist previously. Legends created automatically are limited to depict only the first 20 lines in the plot; if you need more legend entries, you can manually create a legend for them all with legend(‘string1’,’string2’,…) syntax.
legend(‘boxoff’), legend(axes_handle,’boxoff’) removes the box from the legend in the current axes or the axes specified by axes_handle, and makes its background transparent.
legend(‘boxon’), legend(axes_handle,’boxon’) adds a box with an opaque background to the legend in the current axes or the axes specified by axes_handle.