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
# E$ }4 |! q- n! N$ }$ ^; \* a1. fill命令5 R" z1 G( F' E
fill命令填充曲线的颜色的引用格式：5 [( A* ?, R+ Y! b$ |
例1：填充sin曲线与0线之间的空间颜色为红色3 t$ d6 q( L l4 C/ t! T1 K
x = 0:0.01:2*pi;" Y: S2 Z0 x+ p+ ]+ x* J
y = sin(x);
# p) z6 A) `$ u1 \1 \; \3 q' Zfill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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% _- S; b( U' z5 i+ o4 O例2：修改填充色的透明度
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y = sin(x);5 c* w& [/ \, E4 J2 Z; `
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
+ ?& J# D6 [; p! Sset(h,'edgealpha',0,'facealpha',0.3). T& H# J7 p# F* F7 Q5 m* O( K7 }
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例3：三维填充色# O$ J1 m$ z _' r9 D* r/ M
close all;figure% b9 k% L: u: |; a# A% ?( R: l& S7 w
[xx,yy] = meshgrid(1:10,1:10);4 w8 P6 i- d. e: B# A8 w) o
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')- Y+ c, B; |; D, ^
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')8 _& ] m1 ^* X2 q3 s0 c9 X. V
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');% q$ R4 b7 j: i: _8 x% `* h' x1 G+ A( v
set(h,'edgealpha',0,'facealpha',0.3)' u6 J: I7 A1 {, }- n4 g4 T2 t
zlim([-2 2])
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2. patch命令
! n+ K. k6 L3 p1 kpatch命令引用格式与fill类似
: ?1 d6 V }$ ~) I5 a例1：) r: |& B3 O& T+ d
close all;figure4 L) F- ], r- l( h' o: P
x = 0:0.01:2*pi;# d8 H2 r: [9 Y/ f
y = sin(x);' b" n) ]* w, ^, g2 l$ n8 n
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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例2：
. t" a& v3 {1 Q; ]: K# z( f |0 Iclose all;figure5 Z2 M9 e: j7 b# B: q
x = 0:0.01:2*pi;
. [2 E7 ?1 P1 h0 N& z& Y c" \y = sin(x);" e) C* t% h: x
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
( t/ V! x/ w( u- Sset(h,'edgealpha',0,'facealpha',0.3)+ t4 i- T9 ?( Q4 w: P" H7 h; z
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三维填充
, D1 v) X% y% G& c' mclose all;figure8 ~. e/ l4 Z3 h& H# d
[xx,yy] = meshgrid(1:10,1:10);
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grid on;
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patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')4 B2 j: z/ n5 z3 J+ u( t- o( R. c
h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');8 k* G5 q( y; K' r4 n$ j
set(h,'edgealpha',0,'facealpha',0.3)8 k5 q2 _* T" O$ H6 E, Z+ q5 O
zlim([-2 2])- l3 Z$ I4 a; s3 h$ N% d! l, |. J
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