MATLAB: How to output an array (with column, row headers) as an image

MATLABsave a tablesave a table as an imagesave an image of a tablesave tablesaving a tabletable as imagetable outputtable to image

This is a very basic question, but one I can't seem to figure out on my own.

I have a 5×6 array of data that I'd like to output as a table. I would like this table to be in the form of an an image file, I.e. a pdf, png etc. with row names, column names, and my data in the table. I don't want to output this as a text file, because I want to output this as a figure to be placed in a paper.

It may seem like this is something that I should simply enter manually into a table in Word (or similar), but the particular data changes frequently, and I'd like this process to be automated.

I found this helpful file: http://www.mathworks.com/matlabcentral/fileexchange/33815-printing-a-formatted-table

But I can't seem to save this as a PDF (perhaps I'm simply doing something wrong), and the program seems to be written for LaTex, which I do not use.

Any help appreciated. Best, Jonathan

Best Answer

Use uitable() to create the table with appropriate headers. Set the 'data' property of the uitable() to a cell array of the values. For example if the values are stored in an array, then

set(handle_of_control, 'data', num2cell(YourArray));

Once you are done, use getframe() to record the table as an image data array, after which you can imwrite() as an image file.

Related Solutions

MATLAB: How to pre-allocate table rows

Danial, I interpret your question as

"I have a table with one row. I'd need the same table, but lengthened to 10 rows so that I can fill in rows 2-9 without growing it one row at a time."

This actually isn't specific to table, although the fact that tables can hold heterogeneous types makes it a bit more interesting.

(By the way, good on you for knowing to start with {'a'}, and not just 'a'.)

One option is to simply repmat the one-row table to be 10 rows:

>> t = table({'a'},1)
t = 
    Var1    Var2
    ____    ____
    'a'     1   
>> t = repmat(t,10,1)
t = 
    Var1    Var2
    ____    ____
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1   
    'a'     1

If you're filling in the table, it doesn't much matter what's in rows 2-9, since you'll be overwriting them. But if you're a stickler, you can assign to the 11'th row, then delete it:

>> t = table({'a'},1);
>> t(11,:) = t(1,:);
>> t(11,:) = []
t = 
    Var1    Var2
    ____    ____
    'a'     1   
    []      0   
    []      0   
    []      0   
    []      0   
    []      0   
    []      0   
    []      0   
    []      0   
    []      0

Hope this helps.

MATLAB: How to create a table and publish it to PDF using the “publish” function

When using the MATLAB "publish" function or the Publish icon on the PUBLISH Toolstrip, you can automatically publish your code for sharing. By default, the output format is HTML, but you can select other formats, such as LaTeX or PDF.

LaTeX offers a convenient way to create tables. LaTeX code can be inserted in your MATLAB file by adding LaTeX markups around it.

For instance, the following code creates a table using the LaTeX syntax and surrounds it with LaTeX markups:

%% LaTeX Markup Example

% This is a table:

% <latex>

% \begin{tabular}{|c|c|} \hline

% $n$ & $n!$ \\ \hline

% 1 & 1 \\

% 2 & 2 \\

% 3 & 6 \\ \hline

% \end{tabular}

% </latex>

However, the code between the markups is only published when the output format specified for "publish" is explicitly set to LaTeX. When trying to publish this code to a PDF file, the code between the markups will be ignored.To generate a PDF file where the table appears, you can use LaTeX markups as above and publish your MATLAB code to LaTeX. This will generate a LaTeX file that can be readily compiled to a PDF file with a LaTeX compiler.

Another possibility is to use a MATLAB "uitable" object on a figure as follows:

data = {1, 1 ;

2, 2 ;

3, 6};

columnName = {'n', 'n!'};

fh = figure;

t = uitable('Units','normalized','Position',...

[0 0 1 1], 'Data', data,...

'ColumnName', columnName,...

'RowName',[]);

figPos = get(fh,'Position');

tableExtent = get(t,'Extent');

set(fh,'Position',[figPos(1:2), figPos(3:4).*tableExtent(3:4)]);

When publishing to a PDF file, MATLAB will include the figure on the generated PDF file. However, the code that generates the figure will also appear in the PDF. To prevent the code from appearing, you can save it to a separate MATLAB script with an appropriate name (for instance Factorial_Table.m) and call this script in the MATLAB script that you wish to publish. In the resulting PDF file, you will see the single command that calls your MATLAB script and the table generated.

Best Answer

Related Solutions

MATLAB: How to pre-allocate table rows

MATLAB: How to create a table and publish it to PDF using the “publish” function

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