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6 H R3 F+ E9 U" L/ t$ S$ s' {( L; O
1. fill命令
7 i) }5 U. Y7 }9 l$ `fill命令填充曲线的颜色的引用格式:4 W. L3 t8 _" U- ]. @* [
例1:填充sin曲线与0线之间的空间颜色为红色
( {1 q/ T/ E- r0 i( p0 b* Ax = 0:0.01:2*pi;
( k6 O' u/ k7 ], [ X+ Dy = sin(x);
: i) Z5 p0 ]* M- _5 ]! y: R" nfill([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
u( N% E4 V$ p+ x) cx = 0:0.01:2*pi;' W0 \: }6 j5 r% s3 }
y = sin(x); x' l$ K, R/ }( n( F* a
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');, a5 `( t: x8 g' |# A
set(h,'edgealpha',0,'facealpha',0.3); a3 j/ p3 A; R, c* Y
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: o+ l# R/ Q6 H# J* D) x6 _例3:三维填充色
7 e0 ^. z6 l' A4 f& V! F* [6 I0 Oclose all;figure
# R3 R: Q3 k5 U/ ^7 Q3 h& N o[xx,yy] = meshgrid(1:10,1:10);& D4 l- f% s& M9 `$ ^
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
1 t/ x' E( T7 K7 M4 P; @: S3 Ggrid on;- G" F0 A' A% g. ?; K; t- n
hold on;( G1 _0 ^: c3 ?, P4 K
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')" Z' P/ F( D$ ?4 @* K: v
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');( z* v1 `3 i9 |$ g
set(h,'edgealpha',0,'facealpha',0.3)
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M) E$ k$ x* Q- S Z; ~6 g2. patch命令
, l. s) A' R4 X y9 a+ Ipatch命令引用格式与fill类似
2 K/ C3 r; e H d. l; b! a例1:
$ K1 l8 ~$ H# t% Z2 e* l! rclose all;figure! N2 Y F( p) w/ @
x = 0:0.01:2*pi;
$ T0 Z9 u, Z' qy = sin(x);! f3 b, S$ |/ Z% z
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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close all;figure7 |2 B" P7 n0 {7 e* a1 \) a8 ^; E
x = 0:0.01:2*pi;
7 \# L3 ^4 W% R9 j0 Xy = sin(x);
/ f2 r6 w( t! A; v) D+ w4 dh = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
2 \1 ]4 k8 R$ b k5 p. oset(h,'edgealpha',0,'facealpha',0.3)
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8 ]. ? S: y3 \! i# A例3:
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close all;figure
- i0 Z3 S; k) @6 v- v( F% Q[xx,yy] = meshgrid(1:10,1:10);
+ k, j$ R, Q' W, spatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')4 b! U% i1 C( j( ~ k$ M
grid on;
# k3 K$ s, o2 T5 chold on;6 t3 z; \' G& b& x
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
: w1 G7 x6 R# `; Eh = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');& p. y+ B9 ]! z# ]' _
set(h,'edgealpha',0,'facealpha',0.3)
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