MATLAB: How to display the elements of a matrix D as an input for the next matrix 729×729 rows and columns

MATLABmatrix

I want the matrix elements to be inputted in the rows as well as in the columns of the matrix so as to get 729×729 matrix.

I am attaching the 729×6 matrix whose elements I want to show as input in the rows and columns.

Please help me generate the 729×729 matrix this way using MATLAB.

regards

surabhi

Best Answer

As discussed in https://www.mathworks.com/matlabcentral/answers/359051-how-to-display-729-double-input-arguments-in-tabular-form-to-get-729-729-matrix#comment_489118 it is important information that you are using R2013a and that you do have access to the Statistics toolbox. I asked you there whether you needed this for display purposes or only for computation purposes, and I showed you there how best to do this for computation purposes.

For display purposes, you will need a display that is a minimum of 36450 pixels wide, assuming that you are willing to accept 8 pixels per character including intra-character gap (narrower characters are hard to read; 6 pixels per character is considered barely readable.) This calculation assumes a 2 pixel gap between labels, which is quite tight.

To draw this, you would text() every character into place, having set the FontSize property to be quite small, and having set a monospaced font. To avoid having space take up a full character position, you would have to text() every column individually, but at least you can do an entire column at a time instead of having to do each item individually.

If someone is imposing on you a need to use a datastructure that looks sort of like this when it displays, then in R2007a to R2013a with Statistics Toolbox, you would use

H = cellstr( strcat('T', char('0' + fullfact([3 3 3 3 3 3])-1 ) ) );
emptyvals = repmat({''}, length(H), length(H));
YourTable = cell2dataset(emptyvals, 'ReadVarNames', false, 'ReadObsNames', false, 'VarNames', H, 'ObsNames', H);

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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.

MATLAB: I have a 48483 matrix , i want to convert it to 48*48 matrix where each element of the matrix will show a list of 3 characters in a cell. how to do it

For all the numbers, you can try this:

[rows, columns, numSlices] = size(m);
index = 1;
ca = cell(1, rows*columns); % Preallocate
for row = 1 : rows
    for col = 1 : columns
        ca{index} = m(row, col, :);
        index = index + 1;
    end
end

Best Answer

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MATLAB: I have a 48483 matrix , i want to convert it to 48*48 matrix where each element of the matrix will show a list of 3 characters in a cell. how to do it