How to pull an item and save it into an array/matrix from a Cell that is composed of a Struct

I have a myVar which is a 1x27 Cell, where each Cell is a Struct. Within the Struct is a Field called myPullItem that I want to grab. However 'pull' with a '(i)' afterwards to increment the array produces an error; when I remove the (i), it only provides me the last cell's Struct myPullItem

 for i=1:length(myVar)

   pull(i) = myVar{i}.myStruct.myPullItem

 end

Error: In an assignment A(:) = B, the number of elements in A and B must be the same.

My objective is to save each field. I am attempting to do this by incrementing through each cell of Structs and saving it.

What am I doing wrong? Thx.

Answer 1

[nas illmatic]

I think I got it. Apparently you need to define 'pull' first. So, you need to define it as

pull=cell(1)

And then it works.

Answer 2

[James Tursa]

pull(i) is likely a scalar, while myVar{i}.myStruct.myPullItem is likely not a scalar. You are trying to stuff multiple values into a scalar, hence the error.

What is myVar{i}.myStruct.myPullItem? Once we know the size we can offer suggestions (e.g., using another cell array, or perhaps an nD array, etc). E.g., something like this:

pull{i} = myVar{i}.myStruct.myPullItem;

or maybe this:

pull(:,:,i) = myVar{i}.myStruct.myPullItem;

Again, can't tell for sure what will work for you until we know what the rhs is.

Answer 3

[nas illmatic]

I tried

pull{i} = myVar{i}.myStruct.myPullItem;

but got Error: Cell contents assignment to a non-cell array object.

And,

pull(:,:,i) = myVar{i}.myStruct.myPullItem;

resulted in Error: Subscripted assignment dimension mismatch.

Types:

• The myPullItem is a 1x16 char field
• myStruct is a 1x1 struct with 1 field
• myVar is a 1x27 cell where each cell is a struct