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 U/ X* N! W. n u, B+ s' _8 X
1. fill命令
. k+ s8 {; _5 A/ {/ e: Lfill命令填充曲线的颜色的引用格式：
3 S+ J8 F& L3 E1 ~/ y9 r例1：填充sin曲线与0线之间的空间颜色为红色
( v5 ~6 I$ v- h: U! \) |x = 0:0.01:2*pi;- s# e; d3 p. p. _4 N8 w+ k
y = sin(x);( \& O2 A- q' y- p* {0 l7 U
fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r')# ]# D& k6 A- k+ t# w9 ~
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例2：修改填充色的透明度! Q) X2 T9 G/ |
x = 0:0.01:2*pi;" S4 d& r% _; T4 e* S8 ]
y = sin(x);7 A7 r# E5 K- T' L
h = fill([x,fliplr(x)],[y,0*ones(1,length(y))],'r');; t. g4 K# ]2 _5 v* W1 {
set(h,'edgealpha',0,'facealpha',0.3)
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例3：三维填充色
6 S" _9 v5 G+ Q; y9 Pclose all;figure
, ] `- T& b; d" q[xx,yy] = meshgrid(1:10,1:10);' \. S- M4 Y) I' I0 c5 {* U
fill3([xx(1, fliplr(xx(1,)],[yy(1, yy(end,],0*ones(1,2*length(yy(1,)),'r')
" b8 f& X/ o; q8 U$ S& Z3 Zgrid on;; T9 l( p& |1 S! ~9 ?. k3 V6 A( O
hold on;
- |( S ~/ y; t$ V5 R; w |6 m# G& kfill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],1*ones(1,2*length(yy(:,end))),'g'); F- Z! B: @3 H9 |5 I5 S1 t
h = fill3([xx(:,1);flipud(xx(:,end))],[yy(:,1);flipud(yy(:,end))],-1*ones(1,2*length(yy(:,end))),'b');
$ n9 ^) q; B( ? K8 Z! {( cset(h,'edgealpha',0,'facealpha',0.3)7 u G& T; Y/ X7 I( F7 x8 j
zlim([-2 2])
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$ L3 X: M8 i* g N2 n2. patch命令
. Y0 n# j) H8 f- ?: W; Hpatch命令引用格式与fill类似" y. j& G1 v, S) ^7 e9 I
例1：4 K- u$ v0 y% a& x8 ? S# {1 Y
close all;figure
! s3 l0 i; f1 W, o W1 ?4 C& k% j2 bx = 0:0.01:2*pi;
' w8 {& {& q) qy = sin(x);% M0 s3 \- z0 F8 s
patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')
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5 H7 _# f6 d- _( u( y, [) W6 u例2：
! i* E% @2 j+ l2 G1 R' }+ oclose all;figure
, A- g: b2 K) ^: ]' b' h8 ix = 0:0.01:2*pi;$ g, L K& l' \! E) n
y = sin(x);
6 Y9 S% ?& B+ a* K, r4 th = patch([x,fliplr(x)],[y,0*ones(1,length(y))],'r')；
( H+ U8 N$ d* j3 T: Qset(h,'edgealpha',0,'facealpha',0.3)& `% ?' e5 k! ]$ x, y
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例3：5 C5 M/ ?4 Y/ {8 ?
三维填充1 z+ g7 k% v) B, c, p
close all;figure4 o. Z: M" | `/ p
[xx,yy] = meshgrid(1:10,1:10);
& c. h+ u$ |9 n/ q/ C. j7 Gpatch([xx(1, fliplr(xx(1,)],[yy(1, yy(1,],[-1*ones(1,length(yy(1,)) 1*ones(1,length(yy(1,:)))],'r')
7 d2 X$ e' |8 m- d+ ]# Wgrid on;2 ?3 D2 H8 B C& m% Q2 I5 m
hold on;
( g( W: k8 |9 g7 q8 Z0 q3 upatch([xx(1,:) fliplr(xx(1,:))],[yy(2,:) yy(2,:)],[-1*ones(1,length(yy(1,:))) 1*ones(1,length(yy(1,:)))],'g')* b" |7 s+ D, ^- r K8 v7 Y
h = patch([xx(:,1);xx(:,1)],[yy(:,1);flipud(yy(:,end))],[-1*ones(1,length(yy(1,:)))... 1*ones(1,length(yy(1,:)))],'b');6 ]3 T" a- x4 u* n& C3 s8 H( I9 Z
set(h,'edgealpha',0,'facealpha',0.3)7 Z- r- J0 |! @
zlim([-2 2])
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