How to display 729 'double' input arguments in tabular form? to get 729*729 matrix

I have a list of 729 elements, each element being 6-tuple. I want to display this list in the form of a table. Elements in rows is same as elements in columns.

[Walter Roberson]

Could you show us a sample output?

Could you confirm that the total amount of data that you have is 729 * 729 * 6 = 3188646 values?

How is the data stored now? Is it a cell array containing 729 elements, each of which is a cell array containing 729 elements, each of which is 6 elements?

Or do you have a cell array of 729 elements, each of which contains 6 elements and you want to put in zeros for the remaining (729-6) elements of the row?

[surabhi sachdeva]

I have attached the list.

First of all, I want to display the list in the form of a matrix(table) having 729 rows and 729 columns. The elements in rows are the same as the elements in the column.

Secondly, I have initial conditions available, on the basis of which I want to filter out the unwanted elements from the list attached. Each of the 729 elements is a 6-tuple (i,j,k,l,m,n).

The initial conditions include

i=0,1,2
k=1
l=1
m=1

Now, I want to remove the unwanted elements automated out of the list M. Kindly suggest how the code to be written in MATLAB.

[Walter Roberson]

I do not understand what the 729 x 729 array is to look like. Are you saying that it needs to be a symmetric matrix? Is it certain that a symmetric matrix with the required properties can be created?

[Stephen23]

@surabhi sachdeva: MATLAB does not have any data type/class named "tuple", so it is not clear what you expect to happen. The input you supply to fullfact is a 1x6 double array. To learn the basic data types you should do the Introductory Tutorials, which are highly recommended for all beginners:

https://www.mathworks.com/help/matlab/getting-started-with-matlab.html

" I want to generate a 729x729 matrix..."

The output you get from fullfact is a 729x6 matrix. This is correct for the values that have provided. It is not clear what you want to do with this 729x6 matrix, nor why you expect to be able to turn it into a 729x729 matrix.

"...being each element in row and column similar to one another"

It is not clear what this means. Are you wanting a symmetric matrix of some kind?

Answer 1

[Walter Roberson]

H = cellstr( strcat('T', char('0' + fullfact([3 3 3 3 3 3])-1 ) ) );
emptyvals = repmat({''}, length(H), length(H));
YourTable = cell2table(emptyvals, 'VariableNames', H, 'RowNames', H);

Now YourTable is a 729 x 729 table in which each entry is an empty character vector (that you can then overwrite with appropriate content.) The columns are labeled, with

T000000    T100000    T200000    T010000    T110000 etc

and so are the rows.

In MATLAB, the column names for table() objects must be valid variable names so it is not possible to use pure numbers, but you could change the T to any alphabetic letter you wanted.

[surabhi sachdeva]

Thank you for your answer, sir

The code I entered

• > H = cellstr( strcat('T', char('0' + fullfact([3 3 3 3 3 3])-1 ) ) );emptyvals = repmat({''}, length(H), length(H));YourTable = cell2table(emptyvals, 'VariableNames', H, 'RowNames', H);*

The code is showing the following results

• Undefined function 'cell2table' for input arguments of type 'cell'.*

What could be done? Kindly suggest

[Walter Roberson]

You are using a MATLAB version that predates R2013b when the table() data structure was introduced. Which MATLAB release are you using, and do you have access to the Statistics toolbox?

If you do not have access to the Statistics toolbox or you are using a release before R2007a, then there is no Mathworks supported data structure to do what you are asking for.

One thing that needs to be considered is whether you need an actual data structure with this arrangement, or if instead you only need to be able to display something with the arrangement you show? If it is for display purposes, then I would be concerned about resolution: anything like that with 729 columns of 6 characters with 8 pixels per characters would need at least 38000 pixels wide to be legible.

[surabhi sachdeva]

Sir, I am using R2013a version of MATLAB. Yes, I have access to the statistical toolbox.

Actually, sir in my case I have been given with certain transitions and not all. Even, I didn't have access to complete state-space. So, first I generated the complete state space, from where I got a total of 729 elements and I was given with only seven states.

So, my aim is to generate the complete state space along with transition rates.For which I have to have access to the complete 729x729 matrix.

Then, I have to filter the elements based on input conditions.

And, finally, I have to apply state transition rules to the state space matrix generated.

Not only display, I need an actual data structure.

Kindly help me out. I have attached a screenshot to show what I am expecting through this query.

Please suggest

[Walter Roberson]

The easiest approach is to use a matrix

M = zeros(3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3);

which you would index as

M(Si, Sj, Sk, Sl, Sm, Sn, Di, Dj, Dk, Dl, Dm, Dn)

where the S* variables are "source" (where you are starting from) and the D* variables are "destination" (where you are going to)

Just remember that indices need to start from 1, so if you are working with 0, 1, 2 values then add 1 before using those as indices.