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 i6 k. l. m3 v; e1. fill命令; d& P( t# n/ S* p
fill命令填充曲线的颜色的引用格式：
$ ^7 A: r& x, F$ n例1：填充sin曲线与0线之间的空间颜色为红色3 _. b+ ^5 @% s
x = 0:0.01:2*pi;% u, | i- _; s0 a& D$ I
y = sin(x);! Y; v8 I+ U$ v5 V. y
fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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3 W) I2 b8 Y7 W, s. X例2：修改填充色的透明度
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y = sin(x);! V2 Q8 z- T6 W9 @, G! S, w7 F5 s- K
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
' Q" m% W& }7 y! n; p/ r6 aset(h,'edgealpha',0,'facealpha',0.3)
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例3：三维填充色6 r. P( M3 Q' }/ y! R& X }; p
close all;figure
8 ~. l4 J4 {* E& ?[xx,yy] = meshgrid(1:10,1:10);
* |6 B( ~, U" d5 Lfill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
( O k" k, `7 g/ T0 zgrid on;% g8 v3 W$ p6 B/ K
hold on;6 }4 |7 t+ J) G, ~2 `5 Y$ k
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')8 u _# @+ y$ s! K
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');! \2 ]' G9 f! h* {$ I
set(h,'edgealpha',0,'facealpha',0.3)3 i5 t" R$ Y# Z% M) {" }
zlim([-2 2])
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9 X# `* [* h- ]- K& P2. patch命令" A+ C1 E5 m8 ~; U/ E3 a( f
patch命令引用格式与fill类似1 O, C/ [3 c5 A' N+ _. g
例1：
9 C0 b' H9 K+ U- fclose all;figure
% ~4 {, {7 r4 W7 wx = 0:0.01:2*pi;+ Y2 d8 D2 {' o' f- U+ W
y = sin(x);+ D) [. B' c8 F8 Q
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')8 x- b* G; _6 H8 l- o
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6 \0 a/ G& g \+ {例2：
$ f6 k$ W' s R( s; u9 u& O- F) Qclose all;figure
' j; ]2 y8 [# \7 c# R7 cx = 0:0.01:2*pi;: w$ l( T, h- S- G J
y = sin(x);: z, y. w, b- i3 b, N0 R9 Z X+ j9 h
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
' q$ s9 t& C' [set(h,'edgealpha',0,'facealpha',0.3); b% y# I# D& ]! ?! f# X
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! f! M3 I; x( c6 k例3：
4 G1 l ~" D( L( |" |2 Q b9 N三维填充
$ g7 O' k6 V% u w: aclose all;figure* t, z1 n; L- S* r
[xx,yy] = meshgrid(1:10,1:10);
6 _2 I2 o7 ]! Dpatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')5 Z2 [7 L) P4 \' a0 _2 }3 E! C' c
grid on;% G; V/ o: I% B. A5 c1 Z" p; @
hold on;+ U1 H" b) I- y) F) W; Q
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
+ a/ A9 }# y6 E# Q6 ih = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');0 X0 y/ Z" \6 ~% k; p/ p
set(h,'edgealpha',0,'facealpha',0.3)
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