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, r' u; r7 d C6 f6 o( s
1. fill命令# C Q3 l: z& M. ?$ K% }4 S
fill命令填充曲线的颜色的引用格式：8 D7 k8 l/ g* q& _5 `: \
例1：填充sin曲线与0线之间的空间颜色为红色
8 ^$ q+ x; p; O7 W9 Z9 L3 qx = 0:0.01:2*pi;
0 O+ u0 p% W3 x+ E$ S7 Ay = sin(x);8 a, ?1 r, S: ~
fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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0 X. Z T9 F, S2 C9 V0 m例2：修改填充色的透明度
% q; \1 x6 ^" f; wx = 0:0.01:2*pi;
6 ]; Y5 m$ n( I+ e$ t, I4 @y = sin(x);) G$ Z2 Z8 u- h5 s! X
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r'); f$ X/ Y+ h# c4 H
set(h,'edgealpha',0,'facealpha',0.3)$ i" ]' q q9 D
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: j: F2 Q6 y, E1 rclose all;figure
0 C; F# r. `; F8 L8 E( G[xx,yy] = meshgrid(1:10,1:10);6 }2 ^* h0 T' H! e0 O
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
# f& o5 p: t0 Q" u) A/ ?grid on;
7 e# o4 p Y2 H) `" `# r/ w( Qhold on;$ i# w( f' B. m- w# D
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')
- _% N" a# `: @, m% f( \" a* i/ i1 y! _h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');
! p9 E/ a3 [$ O; qset(h,'edgealpha',0,'facealpha',0.3)2 v* |4 O$ J2 M8 J) i9 G' d
zlim([-2 2])7 L/ J) k3 o; K; Q) [) ^, A4 f
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6 J9 k5 b" V5 i0 A# r& s4 A* X2. patch命令
% e8 J/ ^) |' x3 F9 ~# ~patch命令引用格式与fill类似
3 s/ w" V4 R+ t! I& J4 @' a, W例1：
0 r: r: }9 _' Z* ^/ Rclose all;figure& \7 I6 C* g. ?( G
x = 0:0.01:2*pi;7 E, S* [. H# a+ ~2 X% h/ h
y = sin(x);
1 \+ b5 g/ T( v# k8 s, k, B cpatch([x,fliplr(x)],[y,0*ones(1,length(y))],'r'): F2 v" ?# G- b
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例2：
$ D) ^$ \7 T9 P Sclose all;figure
! ^0 u8 g' R+ zx = 0:0.01:2*pi;. r; x/ @; m; M
y = sin(x);
+ w k8 S! C, X6 v) |- Ih = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
, M# r* m* m! |9 J3 ]# ]) ^set(h,'edgealpha',0,'facealpha',0.3)
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例3：0 S0 n- F# m5 c9 y0 d/ ?
三维填充
: K' j- G' c! U7 F- zclose all;figure
4 H4 O) k" G, m3 [5 T[xx,yy] = meshgrid(1:10,1:10);0 T3 M4 z% E0 ?9 ?" F
patch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')2 K5 d( ]* u1 B6 r
grid on;
/ u8 ~# \3 B7 ?1 x# Xhold on;+ J( d) v8 o4 G" p- @
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')2 R. }3 ~1 \( Z! W
h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');* }, s" ]! L1 {& x7 h! y
set(h,'edgealpha',0,'facealpha',0.3)" J8 B! _: f! w' _: I1 ]7 A
zlim([-2 2])3 W" c9 t7 D8 {7 _1 L' W4 |3 {
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