I want to store the matrices that are obtained from the loop each time.

No matter how many times I try to store the matrices obtained at the end of the largest loop (i=1:m-1), it always ends up with a size mismatch error. Please Help!

q=input('Enter the q matrix:');

qd=input('Enter the maximum speed:');

m= size(q,1);

for i=1:m-1

q_current(i,:)=q(i,:);

q_next(i,:)=q(i+1,:);

for j=1:3

t(i,j)=(q_next(i,j)-q_current(i,j))/qd(j);

end

tmax(i)=max(t(i,:));

for j=1:3

qd_mod(i,j)=(q_next(i,j)-q_current(i,j))/tmax(i);

step_size(i,j)=0.001*qd_mod(i,j);

end

tra(:,:,i) = LinTra(q_current(i,:), q_next(i,:), step_size(i,:));

//This is where the mismatch problem arises. I want to store each matrix computed by LinTra() to the 3-dimensional matrix "tra". PLEASE HELP!!

end

The function LinTra is as follows:

function tra = LinTra(q_current, q_next, step_size)

q_step=q_current;

n=0;

while q_step<q_next

q_step=q_step+step_size;

n=n+1;

tra(n,:)=q_step;

end

for i=1:3

if tra(n,i)>q_next(i)

tra(n,i)=q_next(i);

end

end

end

Answer 1

[KALYAN ACHARJYA]

q=input('Enter the q matrix:');
qd=input('Enter the maximum speed:');
m=size(q,1);
for i=1:m-1
    q_current(i,:)=q(i,:);
    q_next(i,:)=q(i+1,:);
    for j=1:3
        t(i,j)=(q_next(i,j)-q_current(i,j))/qd;  % Here no qd(j), as qd defined as scalar
    end
    tmax(i)=max(t(i,:));
    for j=1:3
        qd_mod(i,j)=(q_next(i,j)-q_current(i,j))./tmax(i);  
        step_size(i,j)=0.001*qd_mod(i,j);
    end
    tra(:,:,i)=LinTra(q_current(i,:),q_next(i,:),step_size(i,:)); 
end

%Please note I didnot check the logic of the code

[Shourya Mukherjee]

Actually I am trying to enter qd as a 1X3 matrix having maximum velocities of 3 components in each row of the 3X3 q matrix (a particular row of q generalised by i), and in the step

t(i,j)=(q_next(i,j)-q_current(i,j))/qd(j)

I am trying to do an elementwise division such that

t(i,2)=(q_next(i,2)-q_current(i,2))/qd(1)

t(i,2)=(q_next(i,2)-q_current(i,2))/qd(2)

and so on

[Shourya Mukherjee]

The main problem is that on different iterations of i, dimensions of tra are different (say 17X3 in first iteration, 8X3 in second and so on). So the tra(:,:,i) is not accepting different sized matrices. Any idea how to store different-sized matrices in a variable?