Labeling a Piece of Data

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.

Answer 1

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?

well, i imported a set of data, and need to label and display a number from the data.

say the data read

2342    8768
2654    0796
9703    1727

i need to label 2342 and display it.

Display how ? And what do you mean by "label" in this context ?

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));
	else
		fprintf('%d\n', m(k));
	end
end

In the command window:

2342 <=== Look there is 2342, and this is its label!
2654
9703
8768
796
1727

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.