Colormap in 2D plot

I have 3 plot ( q1(s) q2(s) and q3(s) and I would to color functions know that

the mincolor is to zero value end maxcolor is max of q1(s1) q2(s1) and q3(s1).

Could you help me please?

s1=0:0.01:b_inf;
q1_vect = double(subs(q1,s,s1));
subplot(1,3,1)
xx1=[s1;s1];
yy1=[q1_vect;q1_vect];
zz1=zeros(size(xx1));
hs1=surf(xx1,yy1,zz1,yy1,'EdgeColor','interp') %// color binded to "q1_vect" values
colormap(jet)
view(2) %// view(0,90)
ylim([0 18]);
xlim([0 b_inf]);

Answer 1

[Adam Danz]

See documentation for caxis.

doc caxis

After each plot,

caxis([0,  q1(s1)])