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
7 l$ Z1 O6 d8 L9 f8 o0 ^+ K6 x3 {+ G# X1. fill命令' L% a& K: U9 i9 K4 x
fill命令填充曲线的颜色的引用格式：& m! o& x# y' v+ N
例1：填充sin曲线与0线之间的空间颜色为红色8 W& o' W2 k& X# s$ Q1 [+ ^$ p
x = 0:0.01:2*pi;
0 H! B4 v! f2 g, P' qy = sin(x);( ?3 X* B I2 j3 h+ q; c L* [2 m
fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r'), ?" r# {' `! T# U9 j
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例2：修改填充色的透明度2 p) o! r& _5 I4 }3 t! X
x = 0:0.01:2*pi;$ }' X+ s' M: Y- X
y = sin(x);
0 |5 P! ^0 p, ch = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
9 i, [! b; r' c# w9 _set(h,'edgealpha',0,'facealpha',0.3)/ w& W0 l" P. L# K
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9 v1 q! K! \; r0 B例3：三维填充色5 d7 _7 r* c$ l8 l# Z
close all;figure
( I/ o9 m/ \& Q7 Y0 f[xx,yy] = meshgrid(1:10,1:10);: ^) V8 B2 U, F! w9 ], Y- O7 G/ o
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
: R4 q) h! R: J) ^7 Ngrid on;
: X$ N) G# ^9 |hold on;
0 C2 g8 Y/ k- K8 l% vfill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')
# V: _" N0 }& A! ^6 a. R2 t( kh = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');
& t4 S, h* i8 f t. ^! f2 zset(h,'edgealpha',0,'facealpha',0.3)
. s1 u8 D" u5 z! {- A# yzlim([-2 2])
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2. patch命令
5 ?1 t/ k/ {8 R9 Qpatch命令引用格式与fill类似
! I+ X! ^( H& Q+ h& y7 T% C例1：
; E. o7 Y3 c# ]2 e& H$ ]! Mclose all;figure
1 C N- ]4 g+ o3 e6 Mx = 0:0.01:2*pi;' k$ X5 M) `" J0 Z4 e5 O. }
y = sin(x);6 N1 a$ w6 [$ i4 K- E7 d
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r'): R# B8 K! f) |- A
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+ g7 v; ~ N: I5 I$ l, u例2：- |1 K' P0 H; ^, l% V
close all;figure" Y0 n9 H' O9 u+ d; O1 t
x = 0:0.01:2*pi;
0 { V6 i. o1 m* R$ `( h! My = sin(x);
6 m/ L* i# q4 f% lh = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
) U% ]1 Y" I1 y0 g, P9 Q, P2 ]* B7 Vset(h,'edgealpha',0,'facealpha',0.3)) U) t$ O7 c3 h- g" R) Z, m
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4 B8 y0 S2 e( G- E例3：
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close all;figure
& c7 A' T% l# K[xx,yy] = meshgrid(1:10,1:10);
~$ v; @* _ v" Y/ S' N+ P3 s" R4 Zpatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')0 Q0 y8 ]8 c7 Y8 K% g& E, ~
grid on;$ U3 b, d% l: K) u
hold on;
0 t" }+ O: t1 V6 {8 _% M. f4 P4 wpatch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')+ G2 U% r1 P$ i9 Q" C1 r7 v7 c
h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');
1 j! X, h7 a! W- P, h$ `+ jset(h,'edgealpha',0,'facealpha',0.3)
; l8 m' h) z1 S' H/ Fzlim([-2 2])7 E2 p" k; H% x( Y/ q0 I
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