MATLAB: Generating tables of four colomns

homeworktables

Generate a table of conversions of four columns. First column contains dollars, second contains equivalent number of euros, third contains equivalent number of pounds and fourth contains equivalent number of yens. Print 25 lines in the table. Table should include a title, column labels and formatted output (use disp and fprintf commands)

Best Answer

Hint:

fprintf('Dollars   Euros    Pounds   Yen\n')
for k = 1 : 25
  fprintf(.......
end

Look up fprintf() in the help for examples.

Related Solutions

MATLAB: How to find matching rows from three out of four colomns

This solution might not be as simple and elegant as the one Andrei Bobrov provided, but it allows for a tolerance level.

% Example data
A=[ 1    2  3 ; ...
    2    4  6 ; ...
    1.05 2  3 ; ...
    1    52 3 ; ...
    2    4  6 ; ...
    1.05 2  3 ; ...
    5    2  3 ; ...
    1    52 3 ; ...
    5    2  3 ; ...
    ];
D = [4; 8; 5; 1; 2; 3; 5; 7; 8];
% Vector to track which have been processed and how they are grouped
processed = zeros(size(A,1),1);
% Tolerance level
tol = .1;
row = 1;
while ~all(processed)
    % Only check rows that havent been matched yet
    if ~processed(row)
        % Take out the row you want to compare to the others
        curRow = A(row,:);
        % Subtract that row from all rows in A
        subtractedA  = A - repmat(curRow,size(A-1,1), 1);
        % Check to see if they are within the tolerance level
        matchingRows = all((subtractedA <= tol & subtractedA >= -tol),2);
        % Mark the rows as processed
        processed(matchingRows) = row;
        % Update A to the mean of all matches
        A(matchingRows,:) = repmat(mean(A(matchingRows,:),1),sum(matchingRows),1);
        % Sum the D values that matches
        D(matchingRows) = sum(D(matchingRows));
    end
    % Check the next row
    row = row + 1;
end
% Results
[A(unique(processed),:) D(unique(processed))]

MATLAB: Read colomn data from file

Try

    TheData = cssm();

where

    function    TheData = cssm()
        FormatStr = repmat( '%f', 1,12 );
        FileId = fopen('b.txt');
        DataCell = textscan(FileId, FormatStr ...
            ,   'HeaderLines', 39, 'CollectOutput', true );
        fclose(FileId);
        TheData = DataCell{1};
    end

The problem with your code has something to do with the delimiter being "one space" or "one or many spaces". And no need (/better not) to include space in the format-string. Default takes care of it. See the documentation.

Best Answer

Related Solutions

MATLAB: How to find matching rows from three out of four colomns

MATLAB: Read colomn data from file

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