MATLAB Answers


Labeling a Piece of Data

Asked by Tyler
on 5 Oct 2012

I imported a txt file which gave me two columns. Well the top left number needs to be give a label/name(need to display and label it). How would I go about doing this? I have only had matlab for about 3 days. I have gained a slight grasp, but not even close to using it effectively obviously.

Thanks in advance.


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1 Answer

Answer by Walter Roberson
on 5 Oct 2012

There is no way to label or name a number in MATLAB. MATLAB numeric arrays are purely numeric.

Perhaps you are looking for MATLAB's dataset objects?

Or perhaps you are looking to display the numbers as text in the command window, with a header line (or header column) ?

Or perhaps you are looking to make a table in a graphics window, such as with uitable()?

Or perhaps you are wanting to generate an HTML table from the numbers and view it in a browser?


Here, try this:

m = [2342    8768
2654    0796
9703    1727];
for k = 1 : numel(m)
	if k == 1
		fprintf('%d <=== Look there is 2342, and this is its label!\n', m(1));
		fprintf('%d\n', m(k));

In the command window:

2342 <=== Look there is 2342, and this is its label!

This code also seems rather effective:

rectangle('Position', [.1 .1 5 3]);
axis equal;
patch([.1 5.1 5.1 .1], [2 2 3.1 3.1], [.3 .5 .6]);
text(0.9, 2.5, 'Hello, my name is', 'FontSize', 30);
text(1.8, 1.1, '2342', 'FontSize', 50, 'Color', 'b');
axis off;

I would call that an annotation rather than a label, but the difference between those is admittedly not clear.

See my edit where I added the label code at the end. It should be clear that that is a label.

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