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
5 G8 C# p+ x" Y( }4 ?% e Y; s1. fill命令
) u g' C* |0 `( Hfill命令填充曲线的颜色的引用格式：7 M) Y0 d" c# o" z/ M
例1：填充sin曲线与0线之间的空间颜色为红色
' A& V8 }- M b; N# E* q8 Z/ Zx = 0:0.01:2*pi;: K. G( G! e4 G4 b6 T# n
y = sin(x);
7 {+ q/ _1 `& x; x+ ?+ {( Ifill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')8 q" A- h1 m. k& c7 S. e* V) b
' P/ i, n! n. |$ J
! x- Q1 z, [8 p1 b
# l+ L; M# X0 J+ Z7 Y, n8 a8 m
7 G) M+ ~2 I" ?& ~3 h+ E! k5 _# }例2：修改填充色的透明度' S% h. s: G: p" p+ }: h1 p9 F
x = 0:0.01:2*pi;2 F0 m. o8 Y7 T _1 a
y = sin(x);
0 k3 w2 s( T D. sh = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
2 z, ]* o" _6 G, I/ ]- Zset(h,'edgealpha',0,'facealpha',0.3)
7 N- a! j" X/ l! s/ d& t* I; @
% c7 ?! X7 Y* |9 p, o, _1 `3 t
8 p* Q5 Z: n) E4 }' s3 m; j: R% F- N5 u" d6 E' N. ]
% A$ [. I; R# A' u5 q: p" a例3：三维填充色
2 Z9 ?% r* t* m" fclose all;figure8 O: N7 o/ c/ s2 @1 R7 _
[xx,yy] = meshgrid(1:10,1:10);1 f6 k' ] N( T5 x# n; M
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')4 k8 ]4 ] y7 q
grid on;
1 a6 [" I b4 A" s- p Ghold on;
+ t: r6 P: R3 s2 T; `4 G/ B" Kfill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')
" y# u2 c7 R4 Xh = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');. m: @) U# W9 u9 I4 Q$ {; |5 |
set(h,'edgealpha',0,'facealpha',0.3)
# \, l# i0 {' x6 X" m+ M4 Pzlim([-2 2])$ i& u8 N+ A' i$ p7 U
4 n( m. ?$ O" j0 [! w; D9 {
% z% y* X" y# I2 U- w
( M1 F$ K1 Y* M7 K( P
7 S# d0 S# K3 X2. patch命令. A' D f+ ?! Q
patch命令引用格式与fill类似
* S) h0 l3 Z4 D0 |$ _例1：/ I2 O. f" L( _
close all;figure
5 R$ B+ Z; }: d# Ax = 0:0.01:2*pi;
: E* z2 T; R. x+ k; Qy = sin(x);
1 V# E& A) O* o/ ?patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
/ Z3 b# E9 `" x+ u, ?8 \7 x% D) q) d4 q6 w6 l1 s# e1 M/ A
% X9 p3 r; X4 V6 `8 A: w例2：
7 b; g. d6 `8 q' F9 |, [close all;figure
8 y- z4 [0 P# j' H% `: `( \, Qx = 0:0.01:2*pi;) `1 H$ z1 S6 g: X- d6 R
y = sin(x);( I: n7 R& y- Y+ }% ~( \
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
d8 J" N$ Y: w- z3 r; F9 w7 x8 ^set(h,'edgealpha',0,'facealpha',0.3)/ O% K4 M8 Z- ?+ E) u' Z
6 d$ a, A$ l! z/ f+ ~ t; X4 y
" y4 r; Z' O1 Z( Q5 T/ h9 b/ ~! L例3：3 [9 N6 s; O* ^! ?, \
三维填充) \, o& l& h4 G: n
close all;figure y6 Q: H* L; ^( g3 u
[xx,yy] = meshgrid(1:10,1:10);
/ C1 l J! ^6 l5 l: K! o1 [/ D ^: Opatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')- n% i- }# \0 h+ H8 s0 j. N+ T
grid on;' c3 I3 ?3 X0 o2 I
hold on;
" E0 x% B- L( y3 Wpatch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')" W& y7 c5 `8 ]9 Z1 j
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 F$ E' P* a9 a- t j! @set(h,'edgealpha',0,'facealpha',0.3)9 I) ^! _6 P& ]! H+ S
zlim([-2 2])% k% Q; I7 C3 j+ u% v
7 H. L% M2 h3 o0 y' V
: K; z# W/ f* F2 d% e* B, K " l$ W0 y/ j: D# w6 c
; e; t6 {# j1 R% @: ]. r 转载本文请联系原作者获取授权，同时请注明本文来自叶瑞杰科学网博客。 |
8 z4 x+ X) d5 f) J
5 R+ g% c% o+ x# ]: W( e( `, v
+ i4 y" C2 F; H" f) I3 b) K8 I
# H3 W, M% _% @. G h: j