Can you replace names in struct?

Hello.

Can you replace names in struct? We have 35 rows in a struct with following names

EMG_HRstruct(1).data

EMG_HRstruct(2).data

untill EMG_HRstruct(35).data

TD11 has three files in row 1,2,3 and TD12 has three files in row 4,5,6 and so on.

We have to refer to TD11 for example but it is not in the name of our values from the struct.

CAN WE CHANGE THE NAMES? SO THAT WE CAN REFER TO THE FIRST THREE ROWS FOR TD11?

Thanks.

[Matt J]

What are TD11 and TD12 and how are they related to EMG_HRstruct? What does it mean for a "file" to occupy a row?

[Alexa Z]

TD's are subjects and in total 10 but starts with TD3-TD17. EMG data for each subject in the struct, but each EMG data contains 6 columns of muscles. (each TDHR is in a seperate 1x1 struct)

It was each file in a row in the struct overview so each one has a 1x1 struct

[Alexa Z]

[Alexa Z]

[Alexa Z]

can we change the yellow name?

Answer 1

[J. Alex Lee]

Going out on a limb since as Matt J points out it's not clear what exactly everything is, but...

I think what you need is metadata.

If you don't want to change your basic data type, maybe create an intermediary structure lookup to translate names like TD11 into a list of rows

lookup.TD11 = [1,2,3]
lookup.TD12 = [4,5,6]
...

Then you can access the rows like

target = "TD11"
EMG_HRstruct(loopup.(target)).data

which I guess you will have to somehow cat() together if you don't want the data for each row to be spit out separately.

If you can alter your data structure, maybe consider tabular data with a column for the file group

row|filegrp|data
---+-------+----
 1 | TD11  | ...
 2 | TD11  | ...
 3 | TD11  | ...
 4 | TD12  | ...
 5 | TD12  | ...
 6 | TD12  | ...
 7 | TD13  | ...

[Alexa Z]

yes, can we then refer to filegr TD11 in a code? how?

[Alexa Z]

But the lookup was a different struct, can we get a new column in the EMG struct?

[J. Alex Lee]

Yes you can, but at that point I would use a table instead of a struct array if you want to be able to easily index. Of course you can append a new field to EMG_HRstruct so that you can do

EMG_HRstruct(1).Group = "TD11"
EMG_HRstruct(2).Group = "TD11"
EMG_HRstruct(3).Group = "TD11"
EMG_HRstruct(4).Group = "TD12"
EMG_HRstruct(5).Group = "TD12"
EMG_HRstruct(6).Group = "TD12"

But how will you refer to the appropriate rows by specifying 'TD11'? Unless I am missing something, you'd anyway need to create a temporary variable to identify the appropriate "rows", e.g.

idx = [EMG_HRstruct.Group]=="TD11";
subdata = [EMG_HRstruct(idx).data]; % assuming data can be cat()-ed

or whatever