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" ~; D' N7 V% s) I2 k6 m
1. fill命令6 q* X) ~; @7 ?/ {: H/ ?" z
fill命令填充曲线的颜色的引用格式：
$ ~4 V& O# X, @' W, ?例1：填充sin曲线与0线之间的空间颜色为红色4 \7 t8 `. w8 A9 A9 z
x = 0:0.01:2*pi;2 ]2 h) V: h( x7 a3 ~# W/ @
y = sin(x);
7 I0 h! S/ n, G% W9 jfill([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. |9 R3 V `# j+ y8 L; e$ B+ J/ s2 ^: N
x = 0:0.01:2*pi;
# t0 k1 u& `/ m" F# [; a& M! s: ~y = sin(x);
; t0 s- \0 l2 P9 {h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');
4 s$ \. H1 l7 K5 e% g0 n# A% @set(h,'edgealpha',0,'facealpha',0.3)
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例3：三维填充色3 s) c t4 `( ]# z. ~
close all;figure) f, S: x- f1 i3 X4 O4 x/ r- c: {
[xx,yy] = meshgrid(1:10,1:10);% B U: h- G0 o( z
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')0 I, V: V' T& x
grid on;2 H7 ]# b# B- {
hold on;4 n7 Y$ ?/ J& Z% E1 I9 a8 `. b
fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g')
- [7 k2 C1 g& X3 u0 Z2 kh = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');3 P: `5 h& [% E3 y5 J+ s! P# P
set(h,'edgealpha',0,'facealpha',0.3)
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2. patch命令+ M* Z: R) ~* ~
patch命令引用格式与fill类似# a9 u' ]! P. n- |& E5 i
例1：
/ v1 \* o9 u2 Uclose all;figure- O: [7 W0 Q2 A1 b8 W& X5 ^
x = 0:0.01:2*pi;6 K' {2 K4 m4 L, \+ J% s
y = sin(x);
& e" J! y+ ?4 u) u& G- o4 B, fpatch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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$ k: `; N# I. h例2：
0 c8 E4 M3 Z- Q) Q* xclose all;figure U4 ?8 l0 r& O, `) D0 j' i
x = 0:0.01:2*pi;
2 I, C6 M% ]2 c$ z! v# ey = sin(x);/ ]; J# C0 O S$ ~
h = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；! I5 ?0 O7 a# o5 O( t
set(h,'edgealpha',0,'facealpha',0.3)( }$ U( P: A, u. r. h9 s
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" G7 r% E- F- P例3：' b+ m+ P% n1 G
三维填充3 b- N Z" x2 b; I, j
close all;figure \* {+ A. W- e
[xx,yy] = meshgrid(1:10,1:10);
y, S' ?& M& H- `" o, j" w' `8 v$ Upatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')
# \) R, T* X7 b3 D, Igrid on;7 Q1 |# s# {; L4 W
hold on;
' ]! k8 k) k& l' _9 r& \6 Rpatch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')
% C6 |# I8 E" n% B2 T& v: ~$ @h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');5 G* J' w' R' o4 T; F: d2 Y
set(h,'edgealpha',0,'facealpha',0.3)
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