matlab中有多种填充曲线之间空间颜色的方法，在此介绍几种常用颜色填充方法
8 Z/ ~( b# k' X" J1 g1. fill命令
6 S" v" A" C F( ?fill命令填充曲线的颜色的引用格式：5 b8 J8 D% Q. Q
例1：填充sin曲线与0线之间的空间颜色为红色. c1 a3 K+ x; k3 h' h* e
x = 0:0.01:2*pi;
1 j$ M* Z! ~5 B0 {/ @8 ny = sin(x);
8 \. f9 E+ U) p1 L! x6 Rfill([x,fliplr(x)],[y,0*ones(1,length(y))],'r'); G1 M2 X: o. O" c/ L
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* p C* J/ m1 c# |0 n1 c3 a5 t# g, i u例2：修改填充色的透明度
, K) `3 V. Y- `9 }) m- ^) wx = 0:0.01:2*pi;
" D$ m' E# V4 r+ my = sin(x);
0 s8 R2 }# I i1 z& r; Rh = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');$ T' G( p$ n% C- Z* a$ R3 y
set(h,'edgealpha',0,'facealpha',0.3)( S, N! @ ]9 h3 b
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* q @. Q+ i- u) p' y) _+ W例3：三维填充色0 s+ a. _& l, ?+ M
close all;figure9 ]3 ?) O- K& G0 e( |6 q
[xx,yy] = meshgrid(1:10,1:10);
; B2 T- ]8 a( s( ~- V4 [fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')4 v! t) K0 j" q6 S/ w T1 W
grid on;
8 r- A; i3 x G+ q8 {hold on;
& u" P% x$ u* x& |! T. V F9 w2 {fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')
, ` p( Z7 {! W3 K! o" ih = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');8 e' ^+ S' y- `+ d( t( x
set(h,'edgealpha',0,'facealpha',0.3)) X5 }7 r* Z& U* ?
zlim([-2 2]), J" p. G6 e1 |8 S4 h- w; Y
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2. patch命令/ t1 I, E, y1 C! ]
patch命令引用格式与fill类似
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close all;figure# \$ y8 C# y' G5 j& }
x = 0:0.01:2*pi;# R# B- F o# ?1 d5 h6 W
y = sin(x);' h, D4 L. l+ D! u: k
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')$ |, S. r d2 w3 @; d7 @. P
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. [* x+ K( K) Q& ~# F; }例2：
) {- p# W/ f3 y) xclose all;figure
; |, d( v: R. L {$ Y2 N! X( }x = 0:0.01:2*pi;( \9 T! G) s: m1 j
y = sin(x);
( E# B* X+ v2 `. {" t" _1 z- ah = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；, b. y9 o5 G7 N0 B4 r$ [( j
set(h,'edgealpha',0,'facealpha',0.3)
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例3：
( ?5 S m k: f: i& c( ?5 V三维填充: s7 | h$ G+ Q9 e1 O( B; [3 H
close all;figure
8 r9 t0 U) |' x. V( p8 X% F1 T[xx,yy] = meshgrid(1:10,1:10);2 ^) R) L3 n$ p
patch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')
& {5 T: S8 I* Xgrid on;5 G! T* [1 v( k# H
hold on;- O0 d/ m! h6 g5 l1 k
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
V1 Y2 V* U% @) Qh = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');
9 @3 |& A6 [$ l7 v5 }8 Kset(h,'edgealpha',0,'facealpha',0.3)
( W Q: F/ h9 F& _8 L: p# K1 E4 Mzlim([-2 2])
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