How to extract component of vector from a struct with fields across each field

It is more clear if I show you my specific case (see image below).

Let's assume that I created my struct variable called "Database" with many fields (e.g. measurement number).

Is there a simple method to get a 1D vector with the second element of Database.DisplAtReferenceTemperature, across all the fields?

I wonder to have a result equal to

[4712.9  5241.9  5681.2  6053.6  9305.8]

I tried the command

Database(:).DisplAtReferenceTemperature(2)

but does not work.

The "brute force" solution is to crete a for loop that scan all the fields, but in my opinion is not very efficient.

Answer 1

[Adam Danz]

To extract all element from the DisplAtReferenceTemperature fields, add square brackets (or curley brackets to store values in a cell array).

data = [Database(:).DisplAtReferenceTemperature]; 

To extract the 2nd element of DisplAtReferenceTemperature from each structure in the array Database,

data = arrayfun(@(i)Database(i).DisplAtReferenceTemperature(2),1:numel(Database))

[Alberto Mora]

Thank you Adam. I tried your suggestion but does not work as aspected.

In particular, it work correctly if I extract ALL the element across the fields:

[Database(:).DisplAtReferenceTemperature]

But does not work if I ask only the n-th element (e.g. the second), as you suggested:

data = [Database(:).DisplAtReferenceTemperature(2)]

Indeeed I get the following error message:

>>>  Expected one output from a curly brace or dot indexing expression, but there were 5 results.

[Adam Danz]

oops, just noticed that. Sorry. I updated my answer.

[Alberto Mora]

Wow, thank you. Now is perfect.

Take care that in your first answer that there is still a "(2)" that have to be deleted, regarding the extraction of all the elements. Update you answer such that also the other user can find easily the solution.

Thanks a lot!

[Adam Danz]

Thank you for catching that! Fixed.