anyway to add text with given location at a 'pixel' based figure

is there anyway to add text with given location at a 'pixel' based figure?

in the link below: https://www.mathworks.com/help/matlab/creating_plots/add-text-to-specific-points-on-graph.html it requires the position of a given point. but in my situation, I want to add the text at a given place of a pixel based figure.

Bests,

Yu

Answer 1

[Kevin Phung]

yep!

just do something like:

text1 = uicontrol('Style','text','units','pixels',...
    'position',[],'String','Hello')

Just call out the handle text1 and you can see what other properties of the text box you can adjust (color, fontsize,tag, etc..)

[Yu Li]

Hi:

Thanks for your reply.

a small following question is that, the text does not align well with the annotation. I'm sure the position is right, so perhaps it has some problem with its allignment with the position.

is there anyway to improve it?

Thanks!

Yu

[Kevin Phung]

are we talking the legend, and not creating text objects onto a figure?

[Yu Li]

sorry perhaps I make you misunderstand...

the position [left,bot,width,height], which is used to determine the text, can form a rectangle border, right?

so the text is align to which boarder?

[Kevin Phung]

Ahh I see, usually, to center a text with respect to its borders, I add an extra element to the string, so

text1 = uicontrol('Style','text','units','pixels',...
    'position',[],'String',{'','Experiment'})

should center the word 'Experiment' in the box. Not the most elegant solution.. but I hope the result is what yo uare looking for.

[Yu Li]

I have slightly adjust the position to achieve the desired disply. thank you so much and wish you a wonderful weekend!

Bests,

Yu

Answer 2

[Walter Roberson]

text() permits you to specify horizontal and vertical alignment, and permits you to specify Position and to specify Units . So you can specify the location in Units pixels and you can control how the text aligns relative to that location.

[Yu Li]

Thank you Walter, however, unfortunately, there is no vertical alligment selection....

https://www.mathworks.com/matlabcentral/answers/328604-how-do-i-get-my-text-to-center-vertically-in-a-uicontrol-textbox

[Walter Roberson]

I would not use uicontrol for this purpose . text() within an axes, annotation() for outside an axes.