No arrows in quiver plot

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Elle
Elle 2013-5-13
For some reason there are no arrows in my quiver plot just some weird marks. What am I doing wrong?
if true
clc; clear;
alpha = 0.6; beta = 0.4; rho = 2; gamma = 0.6; phi = 0.7; x = 400; s = 0.2;
l = 100; a = 0.3;
[l,a] = meshgrid(-10:1:10);
lend = NaN(size(l)); aend = NaN(size(l));
%calculate next point from each point
for i=1:length(l)
for j=1:length(a)
lEnd(i,j) = (gamma/rho)*l(i)^(alpha)*a(j)^(1-alpha)*x^(1-alpha);
aEnd(i,j) = s*l(i)^(beta+1)*a(j)^(phi)*x^(-beta) ;
end
end
%plot, arrow directions are changes
quiver(l,a,lEnd-l,aEnd-a,s)
end

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回答（1 个）

David Sanchez
David Sanchez 2013-5-13
set s=2 (for example), you are scaling the arrows to a very small size.
  2 个评论
Elle
Elle 2013-5-13
I changed it but it still doesn't do much. Also realized I was using s as one of the parameters and changed it to sp.
if true
clc; clear;
alpha = 0.6; beta = 0.4; rho = 2; gamma = 0.6; phi = 0.7; x = 400; sp = 0.2;
l = 100; a = 0.3;
%Control of meshgrid [l,a] = meshgrid(-10:2:10);
lend = NaN(size(l)); aend = NaN(size(l));
%calculate next point from each point
for i=1:length(l)
for j=1:length(a)
lEnd(i,j) = (gamma/rho)*l(i)^(alpha)*a(j)^(1-alpha)*x^(1-alpha);
aEnd(i,j) = sp*l(i)^(beta+1)*a(j)^(phi)*x^(-beta) ;
end
end
%plot, arrow directions are changes
quiver(l,a,lEnd-l,aEnd-a,2)
end
Youssef Khmou
Youssef Khmou 2013-5-13
hi, the arrows look fine, what is the issue?

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