How to construct a table with several matrices

Hi.

Is is possible to construct a table in MATLAB that contains four matrices? That is, if I were to have four matrices:

      Sigma1 = [1  0.5;  0.5 1];
      Sigma2 = [1 -0.5; -0.5 1];
      Sigma3 = [0.4  1;  8.0 2.0];
      Sigma4 = [8.0  2;  0.2 0.1];

Could I put this into a table that has two ColumnName and two RowName, but each "value "in the table is one Sigma matrix? Can you please help me?

Answer 1

[Matt Fig]

The closest you can come is to put each element of each Sigma into the items in a popup.

Sigma1 = [1  0.5;  0.5 1];
Sigma2 = [1 -0.5; -0.5 1];
Sigma3 = [0.4  1;  8.0 2.0];
Sigma4 = [8.0  2;  0.2 0.1];

S1 = arrayfun(@(x) sprintf('%2.2f',x),Sigma1,'Un',0);
S2 = arrayfun(@(x) sprintf('%2.2f',x),Sigma2,'Un',0);
S3 = arrayfun(@(x) sprintf('%2.2f',x),Sigma3,'Un',0);
S4 = arrayfun(@(x) sprintf('%2.2f',x),Sigma4,'Un',0);

fh = figure('Position',[100 100 400 150],'menu','none');
dat =  { S1{1},S2{1},S3{1},S4{1}};
columnname =   {'Sigma1','Sigma2','Sigma3','Sigma4'};
columnformat = {S1(:).',S2(:).',S3(:).',S4(:).'};
columneditable =  [true,true,true,true]; 
t = uitable(fh,'Units','pix','Position',...
            [10 10 380 130], 'Data', dat,... 
            'ColumnName', columnname,...
            'ColumnFormat', columnformat,...
            'ColumnEditable', columneditable,...
            'RowName',[]);

[Lily]

Thx, Yes I think this is the closest thing to want I'm trying to get :)

[Image Analyst]

Wow, very cool!

Answer 2

[Azzi Abdelmalek]

A={sigma1,sigma2;sigma3,sigma4}

[Lily]

Do you know why I can't use the uitable for this code? Would you recomend some other table function?

f = figure('Position',[200 200 400 150]);
cnames = {'\Original \Sigma','\Sigma for N=100'};
rnames = {'\Sigma_1','\Sigma_2'};
t = uitable('Parent',f,'Data',A,'ColumnName',cnames,... 
            'RowName',rnames,'Position',[20 20 360 100]);

[Image Analyst]

Well, in your original post you said "table" and that is kind of ambiguous. A table could be a cell array/matrix, like Azzi (and I) initially thought, or it could be a uitable like you've now clarified in your comments. See my answer regarding uitable.

Answer 3

[Thomas]

Or you could form a 3D matrix; where each 3rd dimension is an individual Sigma matrix

Sigma1 = [1 0.5; 0.5 1];
Sigma2 = [1 -0.5; -0.5 1];
Sigma3 = [0.4 1; 8 2];
Sigma4 = [8 2; 0.2 0.1];

Sigma(:,:,1)=Sigma1;
Sigma(:,:,2)=Sigma2;
Sigma(:,:,3)=Sigma3;
Sigma(:,:,4)=Sigma4;

 Sigma

[Lily]

If I use this, and by the why it's a brillant solution, I can't seem to use the uitable because it's a 3D soultion. What table function would be better to use? Below is my code for the uitable:

f = figure('Position',[200 200 400 150]);
cnames = {'\Original \Sigma','\Sigma for N=100'};
rnames = {'\Sigma_1','\Sigma_2'};
Sigma(:,:,1) = Sigma1;
Sigma(:,:,2) = Sigma3;
Sigma(:,:,3) = Sigma2;
Sigma(:,:,4) = Sigma4;
t = uitable('Parent',f,'Data',Sigma,'ColumnName',cnames,... 
            'RowName',rnames,'Position',[20 20 360 100]);

Answer 4

[Babak]

mytable=cell(2,2);
mytable{1,1}=[1  0.5;  0.5 1];
mytable{1,2}=[1 -0.5; -0.5 1];
mytable{2,1}=[0.4  1;  8.0 2.0];
mytable{2,2}=[8.0  2;  0.2 0.1];
mytable % display it

[Lily]

THX :) Is it possible to display the mytable in to a inbuild table format? I would like to construct the like you would be able to in Word that is for (1,1) in the displayed table is result would appiear and so on?

[Image Analyst]

Babak - see her response to Tom. The "table" she wants is a uitable, not a cell array.

Answer 5

[Image Analyst]

I'm pretty sure you can't have a 2 by 2 array in one "cell" (here I'm using Excel's definition of cell, not MATLAB's definition of cell) of a uitable. The cells in a uitable can only be single numbers or strings.

As a workaround, you can have a blank (empty) separator column or row in between a 2 by 2 block of cells by putting in null for those rows or columns that you want blank. This will give the appearance of having those 2x2 arrays of numbers separated from each other.

[Lily]

Thx for the answer :) Is it possible to use some other function then the uitable? I'm so new to the table features in Matlab that I really have no idea what other functions would be more sutiable.