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 [! n p4 A/ Q9 T; I9 P' R1. fill命令
4 A J, L5 [$ \6 Q4 ^) }9 W. ofill命令填充曲线的颜色的引用格式：
8 W s$ G7 D. x; l) @例1：填充sin曲线与0线之间的空间颜色为红色
4 U9 ?8 z7 C: H+ Jx = 0:0.01:2*pi;1 i3 E2 E' y. o' ]# D) k( S+ I
y = sin(x);) d7 K: ~) b2 U9 v
fill([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- ]' S6 Y E5 V- n. u( w8 }
x = 0:0.01:2*pi;
N1 G2 z# J. M8 y( Ty = sin(x);! I% ^2 D" L5 ^1 t I
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
9 p: e9 G& p- h- l: {: qset(h,'edgealpha',0,'facealpha',0.3)) K9 E! }/ u+ Q% J' t2 j
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4 L3 W& y3 h3 @例3：三维填充色
/ t: [% R# J/ }3 P( Z8 Q: d0 dclose all;figure" m; D9 N {) Y# l2 H' h W
[xx,yy] = meshgrid(1:10,1:10);
* a5 ~9 k9 Y* h" h+ zfill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
. D h) i* ^8 ?5 }" d7 \grid on;
2 Q- w/ G0 l6 n( C; I' ahold on;% ?$ v: k0 v" b' N6 \! ]0 }$ d1 @
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')" B( Z9 o h- U; l& P3 |2 s
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');
$ w3 f' @$ L6 c2 C. Wset(h,'edgealpha',0,'facealpha',0.3)6 ^. A' B2 E% d1 d! @+ Q0 [
zlim([-2 2])/ c) P2 C, X4 @+ R
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2. patch命令
0 D$ j6 A( ^( {/ Spatch命令引用格式与fill类似
: n5 V0 u$ M3 L" V/ A* }例1：
3 G" \+ q* p A8 }close all;figure4 |0 d9 E Q' p
x = 0:0.01:2*pi;
" T; r) y* C; x8 @; l5 ~7 M" r5 ny = sin(x);
* g+ W' u4 I* q, Ypatch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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例2：/ }3 c3 Z; P2 l u6 p# F2 N- l B
close all;figure
6 b$ D/ v% D1 f ox = 0:0.01:2*pi;
/ {, Y+ p* v! p4 ?9 d( g& yy = sin(x);
+ a0 [# ?9 I) T, k# q c; L# r; vh = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
, J3 y, i2 e8 V1 a9 l) e7 Cset(h,'edgealpha',0,'facealpha',0.3)
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7 w5 ?: V7 g0 N& A# N2 K& [例3：
0 m; Z* n% V8 F- T+ M( M& C三维填充5 ?8 }7 f+ N! B# D8 j- C( w$ f5 M
close all;figure
5 p+ L( ]5 l7 [& i# @! {[xx,yy] = meshgrid(1:10,1:10);! R& Y9 V$ p" _( {7 y
patch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')0 [& B0 }( g% V2 L. o
grid on;! J6 ^. ~7 |: B9 a( `8 Z' q N- H
hold on;' s! }% g1 s6 y) C4 Y9 f
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')' H7 X' A/ H0 I- B2 K1 D$ X2 _( g( R
h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');8 H/ c; C T2 M! T8 Z. W. o
set(h,'edgealpha',0,'facealpha',0.3)
8 D* d% p! C/ izlim([-2 2])
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