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6 y( b/ W& x. F6 c+ N3 e3 }4 d
1. fill命令
, ` p9 k5 [, U+ Kfill命令填充曲线的颜色的引用格式：7 e. k: u) a$ l/ U% ?; i1 P" B
例1：填充sin曲线与0线之间的空间颜色为红色
t/ `# r, v$ A$ P8 Kx = 0:0.01:2*pi;3 k" w( U( N) x
y = sin(x);
$ J; x9 p5 I: H7 c$ Cfill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')2 r' E7 u! b K" `, u# o% k
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例2：修改填充色的透明度
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y = sin(x);( K* j: S% V$ V/ r3 z5 p* t+ y
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');6 j' p& c5 |. r5 a
set(h,'edgealpha',0,'facealpha',0.3)/ ^- ?; S9 Y' I) c
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例3：三维填充色
' p- ?6 i' y+ D3 _ Aclose all;figure
8 b9 ]3 F" R$ A: I7 T; s" x[xx,yy] = meshgrid(1:10,1:10);
- _. o. j" K( C3 A" L- xfill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')+ t) `' f# g: U$ r3 n( G2 P
grid on;
. w! s0 a' j6 \hold on;
, U. N' _/ P( sfill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')
- [5 \+ p- G/ Y, Jh = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');2 U" ]( i4 u, N& z- R* I5 B; H2 D
set(h,'edgealpha',0,'facealpha',0.3)
1 ?1 R1 d3 G# l3 [zlim([-2 2])2 X* ~/ @1 b, C
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2. patch命令# G' r) x o" ~. ~# p- V
patch命令引用格式与fill类似, A8 q/ ^' b0 N9 e( i
例1：
w) z& \! [7 fclose all;figure
9 D' m! E# Z6 mx = 0:0.01:2*pi;
9 s% t" q% p! O ` Cy = sin(x);
; @1 t, [7 a5 E5 Npatch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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例2：
' X) M; U! }/ \ B& l8 Aclose all;figure5 E, o1 D4 G/ ]- l# k2 P& l
x = 0:0.01:2*pi;
1 Y g" M- | f$ `% R1 M- ^4 Cy = sin(x);( E; E0 p/ ]! j
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
2 s$ e- |, l6 O8 F+ h& Bset(h,'edgealpha',0,'facealpha',0.3)
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8 \4 X0 J8 N$ n, p- ^例3：
; |% E( {; y6 ~7 O/ g三维填充
7 c" i3 S7 p E+ Z" ~: d% _$ L' eclose all;figure: n9 `3 t" x5 N# t( P1 t0 ^) i
[xx,yy] = meshgrid(1:10,1:10);
9 W; i. P/ h$ k5 npatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')/ [# T( E8 y/ B) n0 d1 b) Y- ~
grid on;) F& ?: S ~' d$ A' r0 }# _
hold on;; [% O: V8 M+ p/ \
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')+ v# S( E! X3 a7 s/ H
h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');/ t+ l/ U8 S; Z; H6 H
set(h,'edgealpha',0,'facealpha',0.3)4 N; B m; {! y
zlim([-2 2])5 l8 C1 A8 C8 d$ B
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