How can I add text to a plot?

I want to add some text to my graph. I have been through lots of documentation of the text() command. For some reason it just doesn't want to work. I know that sounds like I haven't tried fixing it myself but I have and I'm at a complete loss.

I have tried running the exact example code in the documentation and I receive one of two errors.

??? Subscript indices must either be real positive integers or logicals.

Error in ==> Untitled2 at 2
text(pi,0,' \leftarrow sin(\pi)','FontSize',18)

Or if I make them positive and real integers

??? Index exceeds matrix dimensions.

Error in ==> Untitled2 at 2
text(1,1,' \leftarrow sin(\pi)','FontSize',18)

The example code that I tried running on my PC from the documentation:

plot(0:pi/20:2*pi,sin(0:pi/20:2*pi))
text(pi,0,' \leftarrow sin(\pi)','FontSize',18)

Here is a link to the documentation with the correct output.

http://www.mathworks.com/help/matlab/ref/text.html

Thanks

[Mischa Kim]

Lukas, is the error really referring to the text command? How does the rest of the code look like?

What MATLAB version are you using on what platform?

Answer 1

[Robert Cumming]

Is text a variable in your workspace?

Type:

whos text

In the command line to check.

clear text

To clear the variable -> then try the example from the documentation again.

Answer 2

[David Sanchez]

The error message you pasted refers to a *.m file called Untitled2.m.

Do the following and tell us what you get:

On the command window:

clear all
plot(0:10,0:10)
text(5,5,'TEST TEXT')

Your error message has nothing to do with the text command.

[Anand]

Hi, I have managed to read and display text within a running AVI video file, but now i want to only add text to certain frames...e.g frame 1-20 and 30-40....is there any way i can i can add text from one frame to another instead of it displaying throughout the whole video.

thank you.

Title_={'Smile'};
hText = text(x,y,'string');
imshow(Background);     
text(40,100,Title_{1},'Color','r','FontWeight','Bold','FontSize',40);
delete(htext);

[DONA MERIN JOY]

how can i display a word in figure window in matlab

Answer 3

[Lukas]

Ah thanks Robert. Yes I must have created a variable somewhere called text. I'm sure the clear all command would have worked as well thanks David. I will always use it from now on.

Thanks everyone.

[Robert Cumming]

See this LINK on why using clear all is not always a good idea...