想将两个mesh的三维图放在一个坐标系内，用了hold on函数但是还是只有第一个图出来

zophim

想将两个mesh的三维图放在一个坐标系内，用了hold on函数但是还是只有第一个图出来，麻烦大神帮忙指点一下，非常感谢！
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>> clear
$ p$ t$ _2 n* b% }1 e  |# O5 v  gap=0:0.01:1.5;ad=0:0.01:1.5;ud=0;up=0;bp=0.60;bd=0.060;v=50;p=30;c=10;ca=5;m=50;n=50;
1 a5 a) Q% V3 d. {: y8 X7 h/ Z6 l7 O[ap,ad]=meshgrid(ap,ad);
Pp=-((ad.*ap - bd.*bp).*(ca.*(ad./(ad.*ap - bd.*bp) - bd./(ad.*ap - bd.*bp)) - (ap.*bd - bd.*bp + ap.*ud - bd.*up - bd.*c.*m + bd.*m.*p + ap.*n.*p - ap.*n.*v)./(ad.*ap - bd.*bp)))./(2.*bd);
np1=-(Pp.*bd - ap.*bd + bd.*bp - ap.*ud + bd.*up + bd.*c.*m - bd.*m.*p - ap.*n.*p + ap.*n.*v)./(ad.*ap - bd.*bp);
" @# h" r) R9 X# [  V5 Jnd1=(Pp.*ad + ad.*bp - bd.*bp + ad.*up - bp.*ud + ad.*c*m - ad.*m.*p - bp.*n.*p + bp.*n.*v)./(ad.*ap - bd.*bp);
Uap=Pp.*np1-ca.*(nd1+np1);
: T- E% `  f6 N8 p$ w1 i( g- sPd =-((ad.*ap - bd.*bp).*(ca.*(ap./(ad.*ap - bd.*bp) - bp./(ad.*ap - bd.*bp)) - (ad.*bp - bd.*bp + ad.*up - bp.*ud + ad.*c.*m - ad.*m.*p - bp.*n.*p + bp.*n.*v)./(ad.*ap - bd.*bp)))./(2.*bp);
. t% N' u6 m5 J. |7 cnp2=(Pd.*ap + ap.*bd - bd.*bp + ap.*ud - bd.*up - bd.*c.*m + bd.*m.*p + ap.*n.*p - ap.*n.*v)./(ad.*ap - bd.*bp);
nd2=-(Pd.*bp - ad.*bp + bd.*bp - ad.*up + bp.*ud - ad.*c.*m + ad.*m.*p + bp.*n.*p - bp.*n.*v)./(ad.*ap - bd.*bp);
" Q( I+ K: S2 R' `% R6 nUad=Pd.*nd2-ca.*(nd2+np2);
( A/ G; D( k# H; G, k2 {' e>> mesh(ap,ad,Uap)
6 Y8 q0 F' ~+ r' H0 i" @>> hold on
8 [4 n& {9 b6 k, @, m" \% ^. ]2 a' M>> mesh(ap,ad,Uad)
>> hold off
$ \. v" @& w9 O3 [: s+ c>>
  O9 }2 O6 M) c8 H出来的图片如下：
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artic

你的Uap和Uad之间数量级差别太大，不变换z轴坐标的话，数量级较大的会“吃掉”较小的，做个log变换就好了。
mesh(ap,ad,log(Uap + abs(min(min(Uap)))),'FaceColor','b','FaceAlpha',0.5,'MeshStyle','none')
0 X. v* z) ?5 ?5 p7 J' V& p% khold on;
7 z4 @" {. D3 J0 n  @mesh(ap,ad,log(Uad + abs(min(min(Uad)))),'FaceColor','r','FaceAlpha',0.5,'MeshStyle','none')