/usr/lib/python2.7/dist-packages/healpy/zoomtool.py is in python-healpy 1.10.3-2.
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# This file is part of Healpy.
#
# Healpy is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Healpy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Healpy; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# For more information about Healpy, see http://code.google.com/p/healpy
#
from . import projaxes as PA
from . import rotator as R
import numpy as np
import matplotlib
from ._healpy_pixel_lib import UNSEEN
from . import pixelfunc
pi = np.pi
dtor = pi/180.
def mollzoom(map=None,fig=None,rot=None,coord=None,unit='',
xsize=800,title='Mollweide view',nest=False,
min=None,max=None,flip='astro',
remove_dip=False,remove_mono=False,
gal_cut=0,
format='%g',cmap=None,
norm=None,hold=False,margins=None,sub=None):
"""Interactive mollweide plot with zoomed gnomview.
Parameters:
-----------
map : float, array-like shape (Npix,)
An array containing the map,
supports masked maps, see the `ma` function.
if None, use map with inf value (white map), useful for
overplotting
fig : a figure number.
Default: create a new figure
rot : scalar or sequence, optional
Describe the rotation to apply.
In the form (lon, lat, psi) (unit: degrees) : the point at
longitude *lon* and latitude *lat* will be at the center. An additional rotation
of angle *psi* around this direction is applied.
coord : sequence of character, optional
Either one of 'G', 'E' or 'C' to describe the coordinate
system of the map, or a sequence of 2 of these to rotate
the map from the first to the second coordinate system.
unit : str, optional
A text describing the unit of the data. Default: ''
xsize : int, optional
The size of the image. Default: 800
title : str, optional
The title of the plot. Default: 'Mollweide view'
nest : bool, optional
If True, ordering scheme is NESTED. Default: False (RING)
min : float, optional
The minimum range value
max : float, optional
The maximum range value
flip : {'astro', 'geo'}, optional
Defines the convention of projection : 'astro' (default, east towards left, west towards right)
or 'geo' (east towards roght, west towards left)
remove_dip : bool, optional
If :const:`True`, remove the dipole+monopole
remove_mono : bool, optional
If :const:`True`, remove the monopole
gal_cut : float, scalar, optional
Symmetric galactic cut for the dipole/monopole fit.
Removes points in latitude range [-gal_cut, +gal_cut]
format : str, optional
The format of the scale label. Default: '%g'
"""
import pylab
# create the figure (if interactive, it will open the window now)
f=pylab.figure(fig,figsize=(10.5,5.4))
extent = (0.02,0.25,0.56,0.72)
# Starting to draw : turn interactive off
wasinteractive = pylab.isinteractive()
pylab.ioff()
try:
if map is None:
map = np.zeros(12)+np.inf
map = pixelfunc.ma_to_array(map)
ax=PA.HpxMollweideAxes(f,extent,coord=coord,rot=rot,
format=format,flipconv=flip)
f.add_axes(ax)
if remove_dip:
map=pixelfunc.remove_dipole(map,gal_cut=gal_cut,
nest=nest,copy=True,
verbose=True)
elif remove_mono:
map=pixelfunc.remove_monopole(map,gal_cut=gal_cut,nest=nest,
copy=True,verbose=True)
ax.projmap(map,nest=nest,xsize=xsize,coord=coord,vmin=min,vmax=max,
cmap=cmap,norm=norm)
im = ax.get_images()[0]
b = im.norm.inverse(np.linspace(0,1,im.cmap.N+1))
v = np.linspace(im.norm.vmin,im.norm.vmax,im.cmap.N)
if matplotlib.__version__ >= '0.91.0':
cb=f.colorbar(ax.get_images()[0],ax=ax,
orientation='horizontal',
shrink=0.5,aspect=25,ticks=PA.BoundaryLocator(),
pad=0.05,fraction=0.1,boundaries=b,values=v)
else:
# for older matplotlib versions, no ax kwarg
cb=f.colorbar(ax.get_images()[0],orientation='horizontal',
shrink=0.5,aspect=25,ticks=PA.BoundaryLocator(),
pad=0.05,fraction=0.1,boundaries=b,values=v)
ax.set_title(title)
ax.text(0.86,0.05,ax.proj.coordsysstr,fontsize=14,
fontweight='bold',transform=ax.transAxes)
cb.ax.text(1.05,0.30,unit,fontsize=14,fontweight='bold',
transform=cb.ax.transAxes,ha='left',va='center')
f.sca(ax)
## Gnomonic axes
#extent = (0.02,0.25,0.56,0.72)
g_xsize=600
g_reso = 1.
extent = (0.60,0.04,0.38,0.94)
g_ax=PA.HpxGnomonicAxes(f,extent,coord=coord,rot=rot,
format=format,flipconv=flip)
f.add_axes(g_ax)
if remove_dip:
map=pixelfunc.remove_dipole(map,gal_cut=gal_cut,nest=nest,copy=True)
elif remove_mono:
map=pixelfunc.remove_monopole(map,gal_cut=gal_cut,nest=nest,copy=True)
g_ax.projmap(map,nest=nest,coord=coord,vmin=min,vmax=max,
xsize=g_xsize,ysize=g_xsize,reso=g_reso,cmap=cmap,norm=norm)
im = g_ax.get_images()[0]
b = im.norm.inverse(np.linspace(0,1,im.cmap.N+1))
v = np.linspace(im.norm.vmin,im.norm.vmax,im.cmap.N)
if matplotlib.__version__ >= '0.91.0':
cb=f.colorbar(g_ax.get_images()[0],ax=g_ax,
orientation='horizontal',
shrink=0.5,aspect=25,ticks=PA.BoundaryLocator(),
pad=0.08,fraction=0.1,boundaries=b,values=v)
else:
cb=f.colorbar(g_ax.get_images()[0],orientation='horizontal',
shrink=0.5,aspect=25,ticks=PA.BoundaryLocator(),
pad=0.08,fraction=0.1,boundaries=b,values=v)
g_ax.set_title(title)
g_ax.text(-0.07,0.02,
"%g '/pix, %dx%d pix"%(g_ax.proj.arrayinfo['reso'],
g_ax.proj.arrayinfo['xsize'],
g_ax.proj.arrayinfo['ysize']),
fontsize=12,verticalalignment='bottom',
transform=g_ax.transAxes,rotation=90)
g_ax.text(-0.07,0.8,g_ax.proj.coordsysstr,fontsize=14,
fontweight='bold',rotation=90,transform=g_ax.transAxes)
lon,lat = np.around(g_ax.proj.get_center(lonlat=True),g_ax._coordprec)
g_ax.text(0.5,-0.03,'on (%g,%g)'%(lon,lat),
verticalalignment='center', horizontalalignment='center',
transform=g_ax.transAxes)
cb.ax.text(1.05,0.30,unit,fontsize=14,fontweight='bold',
transform=cb.ax.transAxes,ha='left',va='center')
# Add graticule info axes
grat_ax = pylab.axes([0.25, 0.02, 0.22,0.25])
grat_ax.axis('off')
# Add help text
help_ax = pylab.axes([0.02,0.02,0.22,0.25])
help_ax.axis('off')
t = help_ax.transAxes
help_ax.text(0.1, 0.8, 'r/t .... zoom out/in',transform=t,va='baseline')
help_ax.text(0.1, 0.65,'p/v .... print coord/val',transform=t,va='baseline')
help_ax.text(0.1, 0.5, 'c ...... go to center',transform=t,va='baseline')
help_ax.text(0.1, 0.35,'f ...... next color scale',transform=t,va='baseline')
help_ax.text(0.1, 0.2, 'k ...... save current scale',transform=t,
va='baseline')
help_ax.text(0.1, 0.05,'g ...... toggle graticule',transform=t,va='baseline')
f.sca(g_ax)
# Set up the zoom capability
zt=ZoomTool(map,fig=f.number,nest=nest,cmap=cmap,norm=norm,coord=coord)
finally:
pylab.draw()
if wasinteractive:
pylab.ion()
def set_g_clim(vmin,vmax):
"""Set min/max value of the gnomview part of a mollzoom.
"""
import pylab
f=pylab.gcf()
if not hasattr(f,'zoomtool'):
raise TypeError('The current figure has no zoomtool')
f.zoomtool.save_min = vmin
f.zoomtool.save_max = vmax
f.zoomtool._range_status = 2
f.zoomtool.draw_gnom()
class ZoomTool(object):
"""A class providing zoom capability to a figure containing a Mollweide
and a Gnomonic axis.
"""
def __init__(self,m,fig=None,nest=False,cmap=None,norm=None,
coord=None):
"""m: the map to be zoomed (already plotted in Mollweide view)
fig: the figure to instrument (None->gcf())
"""
import pylab
self.reso_list = [0.05,0.1,0.2,0.3,0.5,0.75,1.,1.5,3.,5.,10.,15.,
30.,45.,60.]
self._map = m
self._nest = nest
self._cmap = cmap
self._norm = norm
self._coord = coord
self._range_status = 0 #0:normal, 1:global map min,max, 2: saved
self.save_min = self.save_max = None
self._graton = False
# find min, max of map
if isinstance(m, dict):
if len(m) == 0:
self._mapmin, self._mapmax = -1., 1.
else:
self._mapmin,self._mapmax = min(m.values()), max(m.values())
else:
mgood = m[m!=UNSEEN]
if mgood.size == 0:
self._mapmin, self._mapmax = -1., 1.
else:
self._mapmin,self._mapmax = mgood.min(),mgood.max()
del mgood
if fig is None: f=pylab.gcf()
else: f=pylab.figure(fig)
self.f = f
f.zoomtool = self
(self._moll_ax, self._moll_cb_ax,
self._gnom_ax, self._gnom_cb_ax) = f.get_axes()[:4]
self._grat_ax = f.get_axes()[4]
self._text_reso, self._text_coord, self._text_loc = self._gnom_ax.texts
self._xsize = self._gnom_ax.proj.arrayinfo['xsize']
self._ysize = self._gnom_ax.proj.arrayinfo['ysize']
try:
self._reso_idx = self.reso_list.index(self._gnom_ax.proj._arrayinfo['reso'])
except ValueError as e:
raise ValueError('Resolution not in %s'%self.reso_list)
self.zoomcenter, = self._moll_ax.plot([0],[0],'ok',
mew=1,ms=15,alpha=0.1)
self.zoomcenter2, = self._moll_ax.plot([0], [0], 'xr',
ms=15, alpha=0.5, mew=3)
self._text_range = self._gnom_ax.text(-0.4, -0.2, 'scale mode: loc',
transform=
self._gnom_ax.transAxes,
va='baseline',
ha='left')
self.draw_gnom(0,0)
self._connected = False
self.connect_callbacks()
def _zoom_on_click(self, ev):
import pylab
try:
ax = ev.inaxes
lon,lat = ax.get_lonlat(ev.xdata,ev.ydata)
if np.isnan(lon) or np.isnan(lat):
raise ValueError('invalid position')
val = ax.get_value(ev.xdata,ev.ydata)
self.lastval = val
self._move_zoom_center(lon,lat)
self.draw_gnom(lon,lat)
except Exception as s:
self._move_zoom_center(0,0,False)
pylab.draw_if_interactive()
#print s
return
def _reso_on_key(self, ev):
if ev.key == 'r':
self._decrease_reso()
elif ev.key == 't':
self._increase_reso()
elif ev.key == 'p':
print('lon,lat = %.17g,%.17g'%(self.lon,self.lat))
elif ev.key == 'c':
self._move_zoom_center(0,0)
self.draw_gnom(0,0)
elif ev.key == 'v':
print('val = %.17g'%(self.lastval))
elif ev.key == 'f':
self._range_status += 1
self._range_status %= 3
self.draw_gnom()
elif ev.key == 'k':
self.save_min = self._gnom_ax.images[0].norm.vmin
self.save_max = self._gnom_ax.images[0].norm.vmax
elif ev.key == 'g':
if hasattr(self,'_graton') and self._graton == True:
self._gnom_ax.delgraticules()
self._moll_ax.delgraticules()
self._graton = False
else:
(self._g_dpar,
self._g_dmer) = self._gnom_ax.graticule(local=False,
verbose=False)
(self._m_dpar,
self._m_dmer) = self._moll_ax.graticule(verbose=False)
self._graton = True
self.draw_gnom()
def _update_grat_info(self):
self._grat_ax.cla()
self._grat_ax.axis('off')
if self._graton:
a = self._grat_ax
t = a.transAxes
a.text(0.1, 0.8, 'moll. grat.:',transform=t,weight='bold')
vdeg = np.floor(np.around(self._m_dpar/dtor,10))
varcmin = (self._m_dpar/dtor-vdeg)*60.
a.text(0.1, 0.65, " -par: %d d %.2f '"%(vdeg,varcmin),
transform=t)
vdeg = np.floor(np.around(self._m_dmer/dtor,10))
varcmin = (self._m_dmer/dtor-vdeg)*60.
a.text(0.1, 0.5, " -mer: %d d %.2f '"%(vdeg,varcmin),
transform=t)
a.text(0.1, 0.35, 'gnom. grat.:',transform=t,weight='bold')
vdeg = np.floor(np.around(self._g_dpar/dtor,10))
varcmin = (self._g_dpar/dtor-vdeg)*60.
a.text(0.1, 0.2, " -par: %d d %.2f '"%(vdeg,varcmin),
transform=t)
vdeg = np.floor(np.around(self._g_dmer/dtor,10))
varcmin = (self._g_dmer/dtor-vdeg)*60.
a.text(0.1, 0.05, " -mer: %d d %.2f '"%(vdeg,varcmin),
transform=t)
def _increase_reso(self):
if self._reso_idx > 0:
self._reso_idx -= 1
self.draw_gnom(self.lon,self.lat)
def _decrease_reso(self):
if self._reso_idx < len(self.reso_list)-1:
self._reso_idx += 1
self.draw_gnom(self.lon,self.lat)
def get_reso(self):
return self.reso_list[self._reso_idx]
def connect_callbacks(self):
if not self._connected:
self._callbacks_id = []
cid = self.f.canvas.mpl_connect('button_press_event',
self._zoom_on_click)
self._callbacks_id.append(cid)
cid = self.f.canvas.mpl_connect('key_press_event',
self._reso_on_key)
self._callbacks_id.append(cid)
self._connected = True
def disconnect_callbacks(self):
if self._connected:
for cid in self._callbacks_id:
self.figure.canvas.mpl_disconnect(cid)
def _move_zoom_center(self, lon, lat, visible=True):
# Move the zoom center marker.
if self.zoomcenter:
x,y = self._moll_ax.proj.ang2xy(lon,lat,lonlat=True)
self.zoomcenter.set_xdata([x])
self.zoomcenter.set_ydata([y])
self.zoomcenter.set_visible(visible)
if self.zoomcenter2:
x,y = self._moll_ax.proj.ang2xy(lon,lat,lonlat=True)
self.zoomcenter2.set_xdata([x])
self.zoomcenter2.set_ydata([y])
self.zoomcenter2.set_visible(visible)
def draw_gnom(self,lon=None,lat=None):
import pylab
wasinteractive = pylab.isinteractive()
pylab.ioff()
try:
# modify rot of the gnom_ax
if lon is None:
lon = self._lon
else:
self._lon = lon
if lat is None:
lat = self._lat
else:
self._lat = lat
self._gnom_ax.proj.rotator._rots.pop()
self._gnom_ax.proj.rotator._rots.append(R.normalise_rot((lon,lat),deg=True))
self._gnom_ax.proj.rotator._update_matrix()
if self._range_status == 0:
vmin=vmax = None
elif self._range_status == 1:
vmin,vmax = self._mapmin,self._mapmax
elif self._range_status == 2:
vmin,vmax = self.save_min, self.save_max
self._gnom_ax.images.pop()
self._gnom_ax.projmap(self._map,nest=self._nest,coord=self._coord,
vmin=vmin,vmax=vmax,
xsize=self._xsize,ysize=self._ysize,
reso=self.get_reso(),
cmap=self._cmap,
norm=self._norm)
if hasattr(self._gnom_ax, '_scatter_data'):
l = [x for x in self._gnom_ax._scatter_data]
#print l
for sd in l:
s, input_data = sd
#print input_data
self._gnom_ax.collections.remove(s)
self._gnom_ax._scatter_data.remove(sd)
theta, phi, args, kwds = input_data
self._gnom_ax.projscatter(theta, phi = phi, *args, **kwds)
del l
if self._graton:
self._gnom_ax.delgraticules()
(self._g_dpar,
self._g_dmer) = self._gnom_ax.graticule(local=False,
verbose=False)
self._gnom_cb_ax.cla()
im = self._gnom_ax.images[0]
if matplotlib.__version__ >= '0.91.0':
cb=self.f.colorbar(im,ax=self._gnom_ax,
cax=self._gnom_cb_ax,orientation='horizontal',
ticks=PA.BoundaryLocator())
else:
cb=self.f.colorbar(im,cax=self._gnom_cb_ax,
orientation='horizontal',ticks=PA.BoundaryLocator())
lon,lat = np.around(self._gnom_ax.proj.get_center(lonlat=True),
self._gnom_ax._coordprec)
self._text_loc.set_text('on (%g,%g)'%(lon,lat))
reso = self._gnom_ax.proj.arrayinfo['reso']
xsize = self._gnom_ax.proj.arrayinfo['xsize']
ysize = self._gnom_ax.proj.arrayinfo['ysize']
self._text_reso.set_text("%g '/pix, %dx%d pix"%
(reso, xsize, ysize))
mode = ['loc','map','sav'][self._range_status]
self._text_range.set_text('scale mode: %s'%mode)
self.lon,self.lat = lon,lat
self._update_grat_info()
except Exception as e:
pass #print e
finally:
if wasinteractive:
pylab.ion()
pylab.draw()
pylab.show()
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