can't picker once pan or zoom chosen

Community matplotlib-users
1

I created a simple scatter plot and a service routine to print out the coordinates of the points I pick with the cursor (based on the demo). It works until I select the pan or zoom cursor. After I zoom or pan, I can no longer get back to the normal cursor which allows me to “pick” a circle. Even clicking “home” doesn’t help.

The code is shown below

···

from matplotlib import figure,pyplot
from numpy import linspace,sin,take

fig=pyplot.figure()

ax1=fig.add_subplot(1,1,1) # (numRows, numCols, plotNum)

t=linspace(0,10,100)
y1=sin(5t)
y2=y1+sin(10t)

line1=ax1.scatter(y1,y2,picker=True)

def onpick1(event):
ind = event.ind
print ‘onpick1 scatter:’, ind, take(y1, ind), take(y2,
ind)

fig.canvas.mpl_connect(‘pick_event’, onpick1)
pyplot.show()

this is based on the demo at

http://matplotlib.sourceforge.net/examples/event_handling/pick_event_demo.html?highlight=scatter

Marc Desmarais

537 Park Av.

Long Beach, CA, 90814

(562) 712 8682 cell

2

marc desmarais-2 wrote:

I created a simple scatter plot and a service routine to print out the
coordinates of the points I pick with the cursor (based on the demo). It
works until I select the pan or zoom cursor. After I zoom or pan, I can
no longer get back to the normal cursor which allows me to "pick" a
circle. Even clicking "home" doesn't help.

The code is shown below

--------------------------------------------------------------------------------
from matplotlib import figure,pyplot
from numpy import linspace,sin,take

fig=pyplot.figure()

ax1=fig.add_subplot(1,1,1) # (numRows, numCols, plotNum)

t=linspace(0,10,100)
y1=sin(5*t)
y2=y1+sin(10*t)

line1=ax1.scatter(y1,y2,picker=True)

def onpick1(event):
ind = event.ind
print 'onpick1 scatter:', ind, take(y1, ind), take(y2, ind)

fig.canvas.mpl_connect('pick_event', onpick1)
pyplot.show()
--------------------------------------------------------------------------------

I ran into the same problem today. The solution was simple. To deactivate
the zoom or pan cursor, click the zoom or pan button again. Picking will
then work again.

- Kjell Magne Fauske

···

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3

Kjell Magne Fauske wrote:

I ran into the same problem today. Does someone know of a workaround? I
use a recent version of matplotlib and the default tk backend. It seems
like the tool bar overrides any user defined events. Is there a way to
deactivate the zoom and pan cursors?

- Kjell Magne Fauske

I'm sorry for the noise. To disable the zoom and pan cursors you just have
to click the zoom or pan button again. Picking will then start working
again.

- Kjell Magne

···

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4

Straightfoward solution is to deselect zoom or pan by clicking those buttons
again. The cursor returns to the "Arrow" shape.
Any better solution?

marc desmarais-2 wrote:

···

I created a simple scatter plot and a service routine to print out the
coordinates of the points I pick with the cursor (based on the demo). It
works until I select the pan or zoom cursor. After I zoom or pan, I can
no longer get back to the normal cursor which allows me to "pick" a
circle. Even clicking "home" doesn't help.

The code is shown below

--------------------------------------------------------------------------------
from matplotlib import figure,pyplot
from numpy import linspace,sin,take

fig=pyplot.figure()

ax1=fig.add_subplot(1,1,1) # (numRows, numCols, plotNum)

t=linspace(0,10,100)
y1=sin(5*t)
y2=y1+sin(10*t)

line1=ax1.scatter(y1,y2,picker=True)

def onpick1(event):
ind = event.ind
print 'onpick1 scatter:', ind, take(y1, ind), take(y2, ind)

fig.canvas.mpl_connect('pick_event', onpick1)
pyplot.show()
--------------------------------------------------------------------------------

this is based on the demo at

http://matplotlib.sourceforge.net/examples/event_handling/pick_event_demo.html?highlight=scatter

Marc Desmarais

537 Park Av.

Long Beach, CA, 90814

(562) 712 8682 cell

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