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
4 c0 W% _9 \$ U% N' O! M1. fill命令 k/ a- ]! D ]
fill命令填充曲线的颜色的引用格式：, k, T' \2 E: `8 ?" F' P
例1：填充sin曲线与0线之间的空间颜色为红色' n9 N8 a1 K7 S0 @
x = 0:0.01:2*pi;, B2 ]4 J" \3 W3 n& @6 y8 {
y = sin(x);
0 P2 ]- E4 I8 w4 A* O( u' G# Xfill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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例2：修改填充色的透明度
! z. {+ h# U& { @x = 0:0.01:2*pi;3 g* U& m$ x/ M7 a* a- Y$ X9 T
y = sin(x);
4 G, ?" a# G+ G4 Hh = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');; H& b% X6 M" z2 m
set(h,'edgealpha',0,'facealpha',0.3)
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例3：三维填充色( E. b) _% d( f5 F
close all;figure
3 k3 T. v' r/ i5 j) k! ^[xx,yy] = meshgrid(1:10,1:10);# }3 r& z: I' I* w9 J0 o: H3 t9 l- J
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
& [* ~; X5 N+ V, y. {$ I. N% Z" Vgrid on;
0 W8 p" w$ ^7 `hold on;" n, c; L0 N. I7 O
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')& G1 B# S! I7 K( B
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');9 _( p' r- {( F( t( U2 ]
set(h,'edgealpha',0,'facealpha',0.3)
2 U& C& X) k rzlim([-2 2])
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8 B- \9 k9 G2 e% Y" `7 F$ L5 q2. patch命令
8 N& i) E' P, G; x& p' gpatch命令引用格式与fill类似0 W- \# o" ~. L8 x2 M
例1：% {+ x }6 Z* \4 w9 p# Z6 F% E o
close all;figure' @3 \/ C) K$ G2 i: h/ g
x = 0:0.01:2*pi;
# x1 _" n4 n: K2 ?. G& X' Zy = sin(x); O4 i- o& p! _) o# f3 q4 {
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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3 z; d) g4 P, ?( C0 d* {例2：
2 Y! E+ C9 e6 B+ U5 R" ?0 [- Pclose all;figure
- v" I7 }# {" I2 b6 ~% w2 hx = 0:0.01:2*pi;
3 v% w( ]3 m L3 \2 uy = sin(x);
: A0 v. ^) Q2 [4 \) \9 uh = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；3 S/ c `! n; d) E
set(h,'edgealpha',0,'facealpha',0.3)' B T6 Z: O( A3 M, p# L2 c
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例3：
$ ?/ c7 K+ T5 E3 j3 X三维填充( X- k' P4 R2 V1 N9 ~9 ]
close all;figure
1 u" K2 B7 F6 J2 f$ M' K[xx,yy] = meshgrid(1:10,1:10);
. p8 H' B5 o2 W4 o9 Vpatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')) G- p( K1 ^& t0 Y s
grid on;, V! ^8 i' C4 u
hold on;
( j+ W2 ]2 U$ v5 Z. o/ Apatch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
" s/ N3 ^$ v. f' |1 `# Dh = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');
! H, h' [$ @+ `. l! J- e! h- n+ uset(h,'edgealpha',0,'facealpha',0.3)
7 ]/ m: i' H% H1 d' szlim([-2 2])
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