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. G) W8 U3 c/ }1 S, M m' Q6 Y) k5 C
1. fill命令
$ y0 o! P1 ^9 u, p: u _fill命令填充曲线的颜色的引用格式：4 [& `5 h8 }( d8 e" J7 B
例1：填充sin曲线与0线之间的空间颜色为红色
* N! U1 t9 Q' N2 s z* B5 Yx = 0:0.01:2*pi;
6 i; N8 A, U1 Q7 `/ c$ {y = sin(x);
, z- X; x9 D6 U) \+ U) efill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')3 A" f! f1 f+ b9 a
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例2：修改填充色的透明度$ t0 I" q5 }% c9 d2 W/ g
x = 0:0.01:2*pi;7 a, `3 ^" M& R4 G% l: r+ @# j- T
y = sin(x);
0 r L7 U5 W: f% T; Ah = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
5 P p/ o# @0 R6 h. ~ hset(h,'edgealpha',0,'facealpha',0.3) Z: b9 A# |* j) P9 J" b* f
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, x6 E- q, C+ g I& w+ d- [例3：三维填充色3 T, m9 R5 o( }2 L" p
close all;figure3 ?, S& ?1 s, I# @
[xx,yy] = meshgrid(1:10,1:10);
; r/ W! y2 R! r# _: {fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')$ [6 A) ^& d9 J7 [( c7 O! `
grid on;
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fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')$ h( O! p/ m- j" r
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');; g* w, G' }$ A# |
set(h,'edgealpha',0,'facealpha',0.3)" R* v$ ?- Y" Q* E& T! R) s
zlim([-2 2])
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2. patch命令
1 ^; b9 S+ Q+ d2 ?: V/ }; R$ _/ |patch命令引用格式与fill类似
' D+ e. k3 t/ t8 c2 {3 Z8 a2 B) ^例1：
/ V- O" @& S! e: k0 Aclose all;figure6 F7 o- X2 T4 u, H3 ?
x = 0:0.01:2*pi;
" G/ @# v, M& t6 g8 `5 D8 Dy = sin(x);
! b! R5 D! Z' y; t# [7 @! Lpatch([x,fliplr(x)],[y,0*ones(1,length(y))],'r'), ~. C0 B1 [' n; h: D1 H3 Q
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例2：3 v/ q1 [: i4 x6 Z
close all;figure
! e+ N Z% U0 j( C9 X; |( v4 {x = 0:0.01:2*pi;
4 G4 p+ G3 `+ m% u0 C1 Gy = sin(x);
1 ]* Q3 @, @; }, a1 `# s* m1 rh = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
9 i) D {4 J1 r2 B; x* ^: sset(h,'edgealpha',0,'facealpha',0.3)
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1 k0 Q/ S0 j9 v: X+ f) b例3：6 I) W& A" o7 K% f. a: `2 a0 }2 [
三维填充- Y& v5 W! e3 Q" S- ], k
close all;figure" a, u% s0 ]1 X
[xx,yy] = meshgrid(1:10,1:10);
) |% x" v+ }* T9 [( J7 \& C* hpatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')! b/ B. B7 K& k2 H
grid on;1 K* o: e$ S# {
hold on;1 `8 g5 q) @- R- B: S7 O
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')0 L( H$ ^8 E9 A' W" @/ z& m
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: n% m9 V q& i- E) Z
set(h,'edgealpha',0,'facealpha',0.3)/ S6 B W5 @ U8 c2 P/ c4 ?
zlim([-2 2])
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