how to make the same length in the struct

i've a struct with filed of various length (see pics)

i want to make the same length of this array

and assign the zero in the data that is not there at the end

i try this ..but it's not correct

>> [Sis.d]

Error using horzcat

Dimensions of arrays being concatenated are not consistent.

[Matt J]

We cannot see the form of Sis from the .png file. It would be best to attach Sis itself in a .mat file.

[Luca Re]

i create new post :

https://it.mathworks.com/matlabcentral/answers/2014131-how-create-matrix-with-syncronizing-data

[Matt J]

The repost has the same issue. The Sis variable is not attached.

[Luca Re]

I replicated part of the structure by simplifying the data

[Luca Re]

I want to use "Date" to sync the "dailyprof" values ​​in the matrix but in your example when you call padcat you don't use the "Date" field so it's not correct

a correct result:

 Sistema        Date      dailyprof
    XX1      25-feb-2023    4
             26-feb-2023    5
             27-feb-2023    6


    XX2      26-feb-2023   7
             27-feb-2023   8
             28-feb-2023   9



            Result

      25-feb-2023    4  0 
      26-feb-2023    5  7
      27-feb-2023    6  8
      28-feb-2023    0  9

[Stephen23]

@Luca Re: I moved your comment here and deleted my answer, because it is clear that you have not sufficiently explained what you are trying to achieve. At no point in your question do you mention anything like "sync" or synchronizing the data with dates or anything like that. Sorry, but my mind-reading crystal ball is currently being fixed as it broke last week. If you want further help, please explain what you want to achieve AND provide the expected output in a MATLAB syntax using the provided data.

[Bruno Luong]

This thread becomes completely a mess. The problem asked now has nothing to do with Padding arrays in structure.

The other thread should not be closed.

[Luca Re]

using last example i write code to do it:

%DATA "XX1"
data=[
'25-Feb-2008'
'26-Feb-2008'
'27-Feb-2008'
];

data=datetime(data);

%DAILYPROF "XX1"
dailyprof=[
4
5
6
];


 b(1)=struct("Sistema",{"xx1"},"Date",data,"dailyprof",dailyprof);


 %DATA "XX21"
data=[
'26-Feb-2008'
'27-Feb-2008'
'28-Feb-2008'
];
data=datetime(data);

%DAILYPROF "XX2"
dailyprof=[
7
8
9
];

 b(2)=struct("Sistema",{"xx2"},"Date",data,"dailyprof",dailyprof);

 %{
  25-feb-2023 4 0
      26-feb-2023 5 7
      27-feb-2023 6 8
      28-feb-2023 0 9
%}


v=[b.Date];
g=unique(v)
hh=zeros(size(g));

for i=1:numel(g)
   for h=1:numel(b(1).Date)
     if g(i)==b(1).Date(h)
         hh(i)=b(1).dailyprof(h);
     end    
   end  
end    
        
M(1)=struct("Sistema",{"xx1"},"Date",g,"dailyprof",hh);

hh=zeros(size(g));

for i=1:numel(g)
   for h=1:numel(b(2).Date)
     if g(i)==b(2).Date(h)
         hh(i)=b(2).dailyprof(h);
     end    
   end  
end    
M(2)=struct("Sistema",{"xx2"},"Date",g,"dailyprof",hh);


RESULT IS M!

Answer 1

[Bruno Luong]

load('matlab_sis.mat')
Date = unique(cat(1,Sis.Date));
DAILYPROOF = nan(length(Date),length(Sis));
for k=1:length(Sis)
    sk = Sis(k);
    [tf, i] = ismember(sk.Date, Date);
    DAILYPROOF(i,k) = sk.dailyprof;
end
T = table(Date, DAILYPROOF)

T = 71×2 table
       Date              DAILYPROOF       
    ___________    _______________________

    24-Feb-2008     1510      NaN      NaN
    25-Feb-2008        0      NaN      NaN
    26-Feb-2008      940      NaN      NaN
    27-Feb-2008        0      NaN      NaN
    28-Feb-2008        0      NaN      NaN
    29-Feb-2008        0      NaN      NaN
    01-Mar-2008        0      NaN      NaN
    02-Mar-2008      -70      NaN      NaN
    03-Mar-2008     -190        0      NaN
    04-Mar-2008    -1360        0      NaN
    05-Mar-2008        0      290      NaN
    06-Mar-2008        0     1220      NaN
    07-Mar-2008        0        0      NaN
    08-Mar-2008        0      120      NaN
    09-Mar-2008      180        0      NaN
    10-Mar-2008     -140        0      NaN

[Luca Re]

excellent..thanks a lot

[Bruno Luong]

Version without loop

n = length(Sis);
Date = {Sis.Date};
lgt = cellfun(@length, Date);
[Date, ~, i] = unique(cat(1,Date{:}));
j = repelem((1:n)',lgt(:));
DAILYPROOF = nan(length(Date),length(Sis));
DAILYPROOF(i+n*(j-1)) = cat(1,Sis.dailyprof);
T = table(Date, DAILYPROOF)

[Luca Re]

thank you

Answer 2

[Bruno Luong]

s=struct('a',rand(5,1),'b',rand(3,1),'c',rand(6,1))

s = struct with fields:
    a: [5×1 double]
    b: [3×1 double]
    c: [6×1 double]

maxheight = max(structfun(@height,s));
padarrays = structfun(@(x) [x; zeros(maxheight-height(x),1)], s, 'unif', 0)

padarrays = struct with fields:
    a: [6×1 double]
    b: [6×1 double]
    c: [6×1 double]

padarrays.a

ans = 6×1

0.8804 0.0268 0.8319 0.5125 0.7417 0

padarrays.b

ans = 6×1

0.5513 0.1335 0.7522 0 0 0

padarrays.c

ans = 6×1

0.4471 0.9683 0.7315 0.4339 0.3527 0.5825

[Luca Re]

i get this error4:

s=Sis.d;

Error using structfun

Inputs to STRUCTFUN must be scalar structures.

Error in untitled2 (line 6)

maxheight = max(structfun(@height,s));

because in the structure there are other camps besides the Sis.d