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4 d5 @* Z8 ?& U& ?" [
1. fill命令: D) D4 S# N: I9 c
fill命令填充曲线的颜色的引用格式：1 q. g7 b: a) I4 C2 u' {
例1：填充sin曲线与0线之间的空间颜色为红色
* L) a: M) t3 Wx = 0:0.01:2*pi;0 H8 o6 e. b0 H% @* t. i
y = sin(x);
5 j. p/ v1 J9 A2 e! Vfill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')0 G, N3 l% t! A5 ~
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; l' l' x& A1 i, A4 o" w3 c例2：修改填充色的透明度
) W( _! F! t2 J- M; r7 Kx = 0:0.01:2*pi;
3 H3 g) Z" L, J" ]2 C! v ny = sin(x);
0 g) ?* |+ [# b( k' x- S1 c& sh = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');5 z& E [0 G0 q+ r8 `$ o
set(h,'edgealpha',0,'facealpha',0.3)
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0 n" a( X5 X* _) p, N# ~7 B8 @& X例3：三维填充色 r# ]* n- x# S9 [8 ?
close all;figure6 K6 v% r; r7 T2 ]
[xx,yy] = meshgrid(1:10,1:10);. F8 L' J" X: E i# T
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
U4 q2 v$ H+ }; L, tgrid on;
3 Y/ H* q8 g5 M. c5 |- i7 b: Zhold on;+ f( h! B' H3 @* b z3 J
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')2 U! v2 z4 Y9 w, T( b
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');
8 G+ ?8 C! n, A- [& bset(h,'edgealpha',0,'facealpha',0.3)# x, w3 T0 K& x( i8 n% t' e* _. B
zlim([-2 2])
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2. patch命令% W/ h9 l$ H! U. o
patch命令引用格式与fill类似' L' v) P7 A8 T7 f5 ~, D2 o
例1：
& N4 n$ K" n4 h, `% [* Iclose all;figure5 Q. Y- C% K; m/ x
x = 0:0.01:2*pi;
+ Z7 S" T$ J, A7 d: [0 P8 P ay = sin(x);* j' [' j" b9 m: q
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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例2：
: K, C/ l0 ]4 Y' c! `4 p3 Q7 M& N7 _close all;figure: b. L( \3 B+ t, e
x = 0:0.01:2*pi;' R4 D6 B" i4 j3 u+ x
y = sin(x);8 M; q& n) [ M4 s9 i
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；1 ]& O; w/ V4 V
set(h,'edgealpha',0,'facealpha',0.3)) R. ?, N3 Q" x
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例3：) p E' T$ n4 r* |$ w5 y2 K& B% Z5 @
三维填充
( {/ t+ B' M4 `5 Jclose all;figure" K4 R+ j3 L7 A. K, n
[xx,yy] = meshgrid(1:10,1:10);. J0 k2 b: I- Z8 L8 ~2 q7 i
patch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')( k& i' J7 ^: S9 D( }
grid on;
9 Z3 J' d! g: W) {hold on;+ v# Y1 H8 B4 e* d) I+ i5 Q5 Q5 n
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')# k. h2 W4 ?$ ^& G: m* ^# t- }, p
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 t' g; R$ v2 Jset(h,'edgealpha',0,'facealpha',0.3)
( Z: ~! }0 C6 {, X, F$ mzlim([-2 2])
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