AttributeError: 'Axes' object has no attribute 'get_proj' in matplotlib - matplotlib

Question

I am making the representation of a polynom function.
I have an error in a matplotlib code and cannot understand where it is coming from. any advice is welcome.
I tried already Gtk3agg but nothing changed.
Below is the failure code.
For any reason 'get_proj' dont work here for creating labels.
And: when I use ax.get_proj() instead,
a) all labels appear bottom left
b) not all labels appear at bottom left (all points are identified by the cursor bot the labels are not written at the bottom left).
The final project will be (few things still to be done):
- on button -> labelling with coordinate appear at each cursor movement (temporary)
- click right button, the labels will be persistent till button clear is clicked
- off button -> no labelling appear
My feeling: the 3x button creation is messing anything up.
# -*- coding: utf-8 -*-
import matplotlib as mpl
from mpl_toolkits.mplot3d.proj3d import proj_transform
import matplotlib.pyplot as plt
from matplotlib.widgets import Button
import numpy as np
mpl.use('tkagg')
def distance(point, event):
plt.sca(ax) # <------------------ introduce this one !!!!!!!!!!!!!!!!!!!!!!!!!!!
x2, y2, _ = proj_transform(point[0], point[1], point[2], plt.gca().get_proj())
x3, y3 = ax.transData.transform((x2, y2))
return np.sqrt ((x3 - event.x)**2 + (y3 - event.y)**2)
def calcClosestDatapoint(X, event):
distances = [distance(X[i, 0:3], event) for i in range(Sol)]
return np.argmin(distances)
#
def annotatePlot(X, index):
global last_mark, generated_labels
if activated_labelling:
x2, y2, _ = proj_transform(X[index, 0], X[index, 1], X[index, 2], ax.get_proj())
last_mark = plt.annotate(generated_labels[index],
xy = (x2, y2), xytext = (-20, 20), textcoords = 'offset points', ha = 'right', va = 'bottom',
bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))
fig.canvas.draw()
#
def onMouseMotion(event):
global Coord
if activated_labelling:
closestIndex = calcClosestDatapoint(Coord, event)
last_mark.remove()
annotatePlot(Coord, closestIndex)
def show_on(event):
global activated_labelling, last_mark,pid,mid
if activated_labelling == False:
activated_labelling = True
x2, y2, _ = proj_transform(Coord[0,0], Coord[0,1], Coord[0,2], ax.get_proj())
last_mark = plt.annotate("3D measurement on " + generated_labels[0],
xy = (x2, y2), xytext = (-20, 20), textcoords = 'offset points', ha = 'right', va = 'bottom',
bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))
mid = fig.canvas.mpl_connect('motion_notify_event', onMouseMotion)
#
def show_off(event):
global activated_labelling
'''
deactivate the persistent XYZ position labels at the grafic
'''
if activated_labelling:
activated_labelling = False
last_mark.remove()
fig.canvas.draw()
fig.canvas.mpl_disconnect(mid)
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
#ax = fig.gca(projection='3d')
activated_labelling = False
Wide = 100
Minimum = -50
ScanLimit = 3 # searching between o and 3; 4 and 5 are no solutions
Search = 45
Coord=[]
values=[]
generated_labels = []
#
XMin = 0
XMax = 0
YMin = 0
YMax = 0
ZMin = 0
ZMax = 0
# count the solutions found in the scan area defined above
Sol=0
for i in range(Wide+1):
for j in range(Wide+1):
for k in range(Wide+1):
########################################################################
########################################################################
####
#### THIS IS THE POLYNOM TO BE REPRESENTED
####
param_dens = ((i+Minimum)**3)+((j+Minimum)**3)+((k+Minimum)**3) -Search
if abs(param_dens) <= abs(ScanLimit):
Coord.append([i+Minimum,j+Minimum,k+Minimum])
if ScanLimit !=0:
values.append([abs(param_dens)])
labelling = "value {}\nin X:{} Y:{} Z:{}".format(Search+param_dens,i+Minimum,j+Minimum,k+Minimum)
generated_labels.append(labelling)
print(labelling+"\n")
# increase the number indicating the solutions found
Sol +=1
# for centering the window
if XMin > i+Minimum:
XMin = i+Minimum
if YMin > j+Minimum:
YMin = j+Minimum
if ZMin > k+Minimum:
ZMin = k+Minimum
if XMax < i+Minimum:
XMax = i+Minimum
if YMax < j+Minimum:
YMax = j+Minimum
if ZMax < k+Minimum:
ZMax = k+Minimum
print('######################################################')
print('## statistics / move this to a parallel search engine?')
print('## search ')
print("## total solution %d for searching center %d" % (Sol,Search))
print("## from %d to %d" % (Search-ScanLimit,Search+ScanLimit))
print("## from %d to %d" % (Minimum,Wide+Minimum))
print('##')
print('#######################################################')
#
values = np.array(values, dtype='int64')
Coord = np.array(Coord, dtype='int64')
#
if ScanLimit !=0:
cmap = plt.cm.jet # define the colormap
# extract all colors from the .jet map
cmaplist = [cmap(i) for i in range(cmap.N)]
# force the first color entry to be black
cmaplist[0] = (0, 0, 0, 1.0)
# create the new map
cmap = mpl.colors.LinearSegmentedColormap.from_list('Custom cmap', cmaplist, cmap.N)
# define the bins and normalize
bounds = np.linspace(0, ScanLimit, ScanLimit+1)
norm = mpl.colors.BoundaryNorm(bounds, cmap.N)
# create a second axes for the colorbar
ax2 = fig.add_axes([0.95, 0.1, 0.03, 0.8])
cb = mpl.colorbar.ColorbarBase(ax2, cmap=cmap, norm=norm,
spacing='proportional', ticks=bounds, boundaries=bounds, format='%1i')
#
ax.set_xlim3d(XMin-5, XMax+5)
ax.set_ylim3d(YMin-5, YMax+5)
ax.set_zlim3d(ZMin-5, ZMax+5)
#
ax.set_xlabel('X X')
ax.set_ylabel('Y Y')
ax.set_zlabel('Z Z')
ax.set_aspect(aspect=1)
# extract the scatterplot drawing in a separate function so we ca re-use the code
def draw_scatterplot():
if ScanLimit !=0:
ax.scatter3D(Coord[:,0], Coord[:,1], Coord[:,2], s=20, c=values[:,0], cmap=cmap, norm=norm)
else:
ax.scatter3D(Coord[:,0], Coord[:,1], Coord[:,2], s=20, c='green')
# draw the initial scatterplot
draw_scatterplot()
# create the "on" button, and place it somewhere on the screen
ax_on = plt.axes([0.0, 0.0, 0.1, 0.05])
button_on = Button(ax_on, 'on')
#
ax_off = plt.axes([0.12, 0.0, 0.1, 0.05])
button_off = Button(ax_off, 'off')
#
#ax_off = plt.axes([0.24, 0.0, 0.1, 0.05])
#button_off = Button(ax_off, 'off')
# link the event handler function to the click event on the button
button_on.on_clicked(show_on)
button_off.on_clicked(show_off)
#fig.colorbar(img)
plt.show()
Traceback (most recent call last):
File "C:\Program Files\Anaconda3\lib\site-packages\matplotlib\cbook\__init__.py", line 388, in process
proxy(*args, **kwargs)
File "C:\Program Files\Anaconda3\lib\site-packages\matplotlib\cbook\__init__.py", line 228, in __call__
return mtd(*args, **kwargs)
File "C:/Users/../Desktop/heat.py", line 137, in onClick
closestIndex,LowestDistance = calcClosestDatapoint(Coord, event)
File "C:/Users/../Desktop/heat.py", line 50, in calcClosestDatapoint
distances = [distance(X[i, 0:3], event) for i in range(Sol)]
File "C:/Users/../Desktop/heat.py", line 50, in <listcomp>
distances = [distance(X[i, 0:3], event) for i in range(Sol)]
File "C:/Users/../Desktop/heat.py", line 35, in distance
x2, y2, _ = proj_transform(point[0], point[1], point[2], plt.gca().get_proj())
AttributeError: 'Axes' object has no attribute 'get_proj'