Re: [Matplotlib-users] remove text from a plot

[Eric F. <ef...@ha...>]

Aaron,

Each text object that you add with the text() function is appended to a 
list called "texts" that is an attribute of the axes object.  So, to 
remove the last text object you added, you can do:

del gca().texts[-1]
draw()

If what you want to do is change the contents but not the position, you 
can do:

gca().texts[-1].set_text('Big Mistake')
draw()

If you want to change the position, you can do:

gca().texts[-1].set_position((3,4))
draw()

Note that in the set_position method, unlike the text() function, the 
position is specified as an (x,y) tuple; the parentheses are required.

Or you can just shift one coordinate:
gca().texts[-1].set_x(5)
draw()

If you want to change the first text object, then of course you would 
use texts[0] instead of texts[-1], etc.

There is an alternative pylab function for setting properties that takes 
care of redrawing automatically.  Here is an example:

setp(gca().texts[-1], 'fontsize', 15)  # Matlab-style
or
setp(gca().texts[-1], fontsize=17)     # nicer style

If you are going to want to experiment with the properties of your text 
object, then grab a reference to it when you create it, like this:

tt = text(6,7,'another one')

setp(tt, fontsize=15)

That way you don't have to keep typing "gca().texts[-1]".


Eric

Aaron Hoover wrote:
> Matplotlib is great. Between numpy, scipy, and matplotlib, I'm almost 
> completely weaned myself off of Matlab (just need to rewrite a bunch of 
> m-files in Python).
> 
> My question is, is there an easy way to remove text that's been added 
> with the text() function from a plot (like if I make a mistake in the 
> text or its position)? I've thought about adding a long string of spaces 
> in the same location, but haven't tried it yet. Is there an easier way 
> like a clear() function or some other method I may have missed?
> 
> Thanks,
> Aaron
> 
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