Matlab绘图中legend的终极用法

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');

可选的位置很多：

North：Inside plot box near top' T- a! B/ a9 {) |0 _
South：Inside bottom3 D' }" K5 _3 |* o2 X/ G7 R
EastI：nside right( b) k- G& ]% D9 E3 o, S' o. k
West：Inside left% a% Z2 x$ w0 f; O' E; {
NorthEast：Inside top right (default)
3 I* ?8 h. W2 k6 |/ V3 e" D& hNorthWest：Inside top left1 i9 a: T3 O) @# ?* A; O
SouthEast：Inside bottom right3 g$ h% y9 m9 u2 u( Q
SouthWest：Inside bottom left
) c$ s  X" X) bNorthOutside：Outside plot box near top
, J+ v3 X8 V" w  @0 ASouthOutside：Outside bottom
, n/ ]& ?, Q! g1 m4 ]EastOutside：Outsideright
1 q$ d' ^# @4 @! M( [7 U" _* iWestOutside：Outside left
% l$ p3 i* H7 A2 I: \/ ^. VNorthEastOutside：Outside top right# `: R) G$ T4 @
NorthWestOutside：Outside top left, }9 D9 c1 G: u2 ?6 N
SouthEastOutside：Outside bottom right
6 V( o7 ^6 R9 N, zSouthWestOutside：Outside bottom left
4 b$ e3 }  L( S& J1 `6 QBest：Least conflict with data in plot
0 ^' M. F& b) ^, Q" }3 \BestOutside：Least unused space outside plot

通常，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]) L. F. X: w3 \) l, k0 \8 o4 n
set(get(get(H(i),'Annotation'),'LegendInformation'),'IconDisplayStyle','off');6 W# L7 L3 y/ j& n; X
end
0 i) i7 k( Y. ~5 n, A# k8 j$ A3 jlegend('1','6','11','16','21');

方法2：简单到郁闷

H = plot(data);$ ~6 J5 L9 e7 V# i
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');  M8 J' v2 @7 ^/ J3 m4 M
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');
+ Q$ a% b- v7 ^+ eset(hl,'Box','off');