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
# y$ Y0 h! m7 l, _1 K$ B* z* P( z1. fill命令1 Q% Z! p8 a# t. W7 I, P9 X
fill命令填充曲线的颜色的引用格式：
" ?( U# d7 G) i% ?( g8 I: H* p例1：填充sin曲线与0线之间的空间颜色为红色
/ i; z0 @, j1 g+ G9 y, ux = 0:0.01:2*pi;& C0 F1 ^/ c1 D+ R& K
y = sin(x);4 A* k" @. `* N) }8 z
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& s9 {1 r# C$ t- _
x = 0:0.01:2*pi;' v( U& ?/ V2 N t% `+ T4 S
y = sin(x);
' j2 u( z/ q6 Fh = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
1 F+ v$ K5 u0 d' w6 Lset(h,'edgealpha',0,'facealpha',0.3): X/ d8 S! K8 h" U" u9 S4 ?% b7 x5 d6 }
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例3：三维填充色2 i! e+ l% i, {8 W
close all;figure1 Y8 W/ U& n1 ?
[xx,yy] = meshgrid(1:10,1:10);9 v3 [: I0 N: c4 L" J
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')( W$ h6 ~. w7 P% f( s
grid on;
2 [- I. j7 t0 ]8 ]7 Phold on;4 ]+ ~% x5 e( j* | E' P1 R
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')% e" k9 Z" Q p/ C3 ]' W& v
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');9 h0 C2 P. v1 a3 w. u! \
set(h,'edgealpha',0,'facealpha',0.3)* @ M" \ f8 P( E% N8 z7 j
zlim([-2 2])0 k4 z P8 v/ ]' I
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. r8 b/ `& V! g9 d0 h3 e& Q2. patch命令
( D- n" h9 W i" l9 zpatch命令引用格式与fill类似
/ Q9 |4 z7 u- w+ w( }* T例1：; X% y/ O, g* R* w5 }1 E
close all;figure$ ?! K4 r( ]/ I( E) B1 O, d
x = 0:0.01:2*pi;" q. ?, _" n! P9 i' W
y = sin(x);
& R. y) R0 |+ X! f/ tpatch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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例2：
- K5 y; S5 z9 t0 sclose all;figure
7 x/ V$ y0 k/ q( Px = 0:0.01:2*pi;
) N$ t; A: X8 M9 E# u! Gy = sin(x);
* r+ p( F* ~% u) N7 A6 bh = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
; c5 G3 v; N" V& u: w/ iset(h,'edgealpha',0,'facealpha',0.3)
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c. ~; o# e1 k& b, Z例3：
% \$ F% R7 k4 y! L/ \( P三维填充
- y8 k6 T, B( X6 P5 Z: Lclose all;figure* a { e1 Q2 d, _2 k+ ^
[xx,yy] = meshgrid(1:10,1:10);, I1 \% j+ a3 Q
patch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')2 T. P: X+ y1 w- g: k
grid on;
& d1 z6 e, u G' B, \. s" Mhold on;% p, s) p) z. g
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
1 ~, C3 b) A) E6 U+ o9 {h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');6 ^5 f1 ]1 h* c* \: o/ U8 d9 j/ l
set(h,'edgealpha',0,'facealpha',0.3)7 N0 Z1 D! M- _0 \, H- w
zlim([-2 2])% y3 E D, }8 n/ l5 M* G: a$ S
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