Gradient using cells and functions

I am taking the gradient of a structure array in x,y as shown below part_x1 and part_y1:

for k1=1:10
q1(k1).p=rand(10,10);
end
for k1=1:10
[part_x1(k1).p,part_y1(k1).p]= gradient(q1(k1).p); %gradient
end

Now with function handle I am trying to do the same as above but doesn't work

A=rand(10^3,1);
for k2=1:10^3
a{k2}=@(z) z*A(k2);
end
%preparing the array for the gradient
l=1;
for k3=1:10
for k4=1:10
  for k5=1:10
q2(k3).p{k4,k5}=@(z) a{l}(z);
l=l+1;
  end
end
end
clear k1 k2 k3 k4 k5 l
% now I want to do what I have done with the matrix above but I have functions this returns 1 value so doesn't work
for k1=1:10
[part_x2{k1}.p,part_y2{k1}.p]=@(z) (cellfun(@gradient,q2(k1).p(z)));
end
%this doesn't work either
for k1=1:10^3
[part_x2{k1}.p,part_y2{k1}.p]=arrayfun(@(z) gradient(q2(k1).p(z)));
end

Any ideas? Thank you!