Saving workspace variables into one struct

I have a workspace containing

   date (178x1 cell)
   opposing_team (178x1 double)
   team (178x1 double)
   win (178x1 double)

I want to merge these variables into 1 struct. I tried using this code here

data = struct('date',{''},'opposing_team',[],'team',[],'win',[]);

but it deletes the data inside it, so when I open the variables it returns with a blank table. How do I create a struct that will keep the data inside? Thanks in advance.

[Stephen23]

@Adhi Ariawan: do you want a scalar structure containing arrays, or a non-scalar structure containing scalars?

[Adhi Ariawan]

I'm not sure what scalar and non-scalar is.. but date is a dd/mm/yyyy format; opposing_team, team and win are integers. They are single columns containing rows of data. I want to save these data as is inside a struct.

[Birdman]

Check my answer.

[Stephen23]

@Adhi Ariawan: "scalar" means that the array has size 1x1:

https://www.mathworks.com/help/matlab/math/empty-matrices-scalars-and-vectors.html

Answer 1

[Stephen23]

Here are the two main options. First we will use this fake data:

>> date = num2cell(randi(365,178,1));
>> oppt = rand(178,1);
>> team = rand(178,1);
>> win  = rand(178,1);

Non-Scalar structure of with scalar fields:

>> S = struct('date',date,'oppteam',num2cell(oppt),'team',num2cell(team),'win',num2cell(win));
>> size(S)
ans =
   178     1
>> S(1)
ans =
  scalar structure containing the fields:
    date =  25
    oppteam =  0.17320
    team =  0.82512
    win =  0.46835

Scalar structure with non-scalar fields:

>> S = struct('date',{date},'oppteam',oppt,'team',team,'win',win);
>> size(S)
ans =
   1   1
>> S.date{1}
ans =  25
>> S.oppteam(1)
ans =  0.17320
>> S.team(1)
ans =  0.82512
>> S.win(1)
ans =  0.46835

[Adhi Ariawan]

Scalar structure with non-scalar fields was what I was looking for. Thanks Stephen.

[Samy Alkhayat]

@Stephen23 Hello Stephen

I have so many non-scalar structures in my workspace and I want to use the command above without having to writing name by name, can you please advise?

Thanks in advance.

[Stephen23]

"I have so many non-scalar structures in my workspace and I want to use the command above without having to writing name by name, can you please advise"

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Depending on what their names are and how many other variables there are, you could possibly use SAVE with its -regexp option or something similar. Read the SAVE documentation.

[Samy Alkhayat]

I have figured it out, that was helpful, thank you!