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
( Y' u) k2 v1 c1. fill命令( S$ {7 n8 s ? H
fill命令填充曲线的颜色的引用格式： }) J% k' S4 B, `+ g$ O$ j
例1：填充sin曲线与0线之间的空间颜色为红色
: o4 P, h1 S, w# ^) h" Z' Vx = 0:0.01:2*pi;5 [* P/ c4 C- o% g9 ?1 }) ^
y = sin(x);
6 v/ G2 e2 E, ]fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')4 v7 y. w, y' H' u: v
Q$ ]/ M7 R2 {, b/ q
7 _) f2 _6 o3 [, ^0 z) y5 S! @
+ y0 \- {; ~" R# ~5 U, b3 n
1 j+ x& e! U" ~* ~% {5 `1 v例2：修改填充色的透明度
8 ]: L3 h/ p7 [! i5 ~" c) zx = 0:0.01:2*pi;% \7 h: R& o; `# V* F* V/ f
y = sin(x);
! e5 s a" p) D5 Y" |+ Qh = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
0 Y. d/ l I: `set(h,'edgealpha',0,'facealpha',0.3)
2 [+ q/ x0 {4 q; i+ P6 {8 H2 N N g6 } p, y. B+ O/ M1 A |
6 I0 ^! }$ M+ i; D. x& Y3 U7 i
4 }8 q3 H% C6 X/ m; I+ h( `6 c3 B+ a$ q4 x
例3：三维填充色) E- V4 O0 v* p3 Y/ }% V
close all;figure! K% t; f3 O6 p, q2 {) n: r6 i
[xx,yy] = meshgrid(1:10,1:10);+ |' m* q- G( o* k* n
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
0 h& s4 ~( h, b$ }& Fgrid on;
2 T I2 e+ Q! k* I' Whold on;
# m. f; ^" m1 u. vfill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')8 x1 e/ D! E3 J3 ^9 h3 v3 O
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');
; H! K* K- g7 i b* [set(h,'edgealpha',0,'facealpha',0.3)$ P+ ?+ ^+ x* j8 b, E9 m, U5 z# B
zlim([-2 2])& J6 b. f8 s; l5 y6 d
- X+ Y/ w& G) }, |7 {- I0 b# _! L% d3 d0 }- u5 V# P- B
! b+ T2 B2 t$ U" U8 k) P& j! [1 ^! D+ q2 G7 Q2 Y" D
2. patch命令2 t* R& C) [ M) f+ ` s" W# t
patch命令引用格式与fill类似4 z- [7 B) m3 l/ n0 B
例1：
- I5 z/ b" J2 @, v2 t$ eclose all;figure
! W; f+ B! I' Z% M! M8 l5 l8 ox = 0:0.01:2*pi;
& z9 P1 i- l Dy = sin(x);: O+ e6 [4 A$ C) k
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
; X/ C2 i$ p% b& |
# I! O4 O" D+ V# X. E" r. n& h i4 ~, ], U/ x2 a% [
例2：
7 b! n* B% W9 }8 q- o8 nclose all;figure; p# [, ^5 X* A" [5 i
x = 0:0.01:2*pi;, ~, X- A9 n* N! t
y = sin(x);4 `5 j9 ^- S- x7 i: S* l" M
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；& M) U% W# B8 C5 r3 [4 H) v& |3 y4 w
set(h,'edgealpha',0,'facealpha',0.3)% t4 W4 _5 k) u3 R8 v* |
4 W6 b+ Y, U7 P* f j4 o
+ f/ R! f( U2 y% ^' r* ^例3：
8 e3 ?' j) O% Q3 Z% h( Y0 p9 p+ o三维填充
5 A3 W/ K8 r0 lclose all;figure
8 \+ X* I. o5 B) U& T( ^4 \" _$ G[xx,yy] = meshgrid(1:10,1:10);
5 i6 N# w" k% j2 v. G7 }1 I Epatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')9 N- ] |/ F2 {0 f- L: S
grid on;3 `6 l4 o# W5 n5 U( h
hold on;7 Z/ d- W! {4 z0 i
patch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
; S; Z/ }; H/ a* Q( K# ]3 zh = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');
: H8 r: N+ d% t$ }+ r7 a! T9 Pset(h,'edgealpha',0,'facealpha',0.3)7 Q% d1 e$ P. W
zlim([-2 2])
" t7 l( }* e, B D# R. S
; W. C% L' R% @' g+ o5 J% G6 B3 K6 Q1 _+ r/ ~( ^
2 v4 Q9 ^% [3 B8 Z5 Y! c- q( M% O0 t" r: k3 d5 ]# F* ]2 Y
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。 |
; Y. A/ y' E$ K6 b5 U; U/ v
4 M; i; \7 X3 E+ ~+ K
8 x5 G% T9 W9 e* H k: ]. f
