save results in new struct

Hi

I want to save results of calculation in an emty struct(3*3*2 with fields:cost)named "mymax".

"stwhole" (3*3*2 with field:cost) at the following code is the name of my original struct. in each field of stwhole that is named cost are two values. and I want to multiply them (these two values of each field) to elements of matrix A separately then find the max of them and save it to corresponding fields in struct "mymax". the size of matrix A is 1*9.

 this code doesn't work correctly.
PLEASE HELP ME

if true
 empty_max.cost=[]
mymax=repmat(empty_max,[3,3,2])
for iteration:1:9
for k=1:9
mymax(k).cost=[]
for i=1:3
for j=1:3
for m=1:2
ops=(stwhole(i,j,m).cost).*A(K)
ty=max(ops)
mymax(k).cost=[ty]
end
end
end
end
end

[Sara]

DO you get an error from matlab or is the result wrong?

[fatema saba]

NO of course with little changes (omit iteration and also substitute A with 2)the code gives me a struct that just one filed of 18 fields is filled by result.

I can't save results in new struct. only one field is filled by result.

[Sara]

On this line you define mymax as a 3,3,2 matrix

mymax=repmat(empty_max,[3,3,2])

but then you treat it as array by doing

mymax(k)

What is the desired outcome?

[fatema saba]

I want to any field of mymax fill with corresponding "ty" that is maximum of product of multiplying two values of each field of stwhole to element of A (or if you think simple substitute A with 2).

[fatema saba]

for example imagine that

stwhole (1,2,1).cost= 2 3

I do 2*2=4 and 2*3=6

them max(4 and 6)is 6

then I save it to mymax(1,2,1)

or

stwhole (2,2,2).cost= 4 5

I do 2*4=8 and 2*5=10

them max(8 and 10)is 10

then I save 10 to mymax(2,2,2)

[Sara]

At any k-iteration you overwrite mymax though. you may want to change:

mymax(k).cost=[ty]

into

mymax(i,j,m,k).cost=ty

or

mymax(i,j,m).cost=max(ty,mymax(i,j,m).cost)

It really depends on what you're trying to achieve when you have an A matrix. Which one is the one you need? Some additional changes are needed depending on which case you meant to implement.

[fatema saba]

excuse me I change my code but it is something wrong yet

if true
for k=1:9
mymax(k).cost=[]
for i=1:3
for j=1:3
for m=1:2
ops=(stwhole(i,j,m).cost).*A(k)
ty=max(ops)
mymax(i,j,m,k).cost=ty
end
end
end
end
end

[Sara]

You will need to change also the initialization into

mymax=repmat(empty_max,[3,3,2,9])

and remove the line

mymax(k).cost=[]

[fatema saba]

A is 1*9 matrix I want to on each iteration one element of A multiply to stwhole(I,j,m) and max of this product save in mymax. then at the next iteration the second lement of A repeat this process and results save in mymax. and these iterations continue up to the end element of A.

Answer 1

[Sara]

Here is how your code will look like:

if true
  empty_max.cost=[]
  mymax=repmat(empty_max,[3,3,2,numel(A)])
  for k=1:numel(A)
    for i=1:3
      for j=1:3
        for m=1:2
          mymax(i,j,m,k).cost=max(stwhole(i,j,m).cost*A(k))
        end
      end
    end
  end
end

[fatema saba]

Thank you SARA. you help me a lot.

thanks for your kindness.