Create an unplaced population

Simple example showing how to create an unplaced axon population with NRV and plot an histogram of the diameters values. In this example population are either created:

See also

Users’ guide

from nrv.utils import geom
from nrv.nmod._axon_population import axon_population

import matplotlib.pyplot as plt
import numpy as np
from pandas import DataFrame

Generate population from data

n_ax = 10
# Randomly generate axon types and diameters
ax_type = np.random.randint(0,2,n_ax)
ax_diameters = np.random.random(n_ax)*20

When data are in a tupple

pop_tup = axon_population()
pop_tup.create_population_from_data((ax_type, ax_diameters))
pop_tup.axon_pop
types diameters
0 1 9.291953
1 0 7.909397
2 1 17.291623
3 0 11.178241
4 0 16.070718
5 0 5.375868
6 0 0.803587
7 0 15.427616
8 0 0.531301
9 1 7.750653


When data are in a np.ndarray

data = np.vstack((ax_type, ax_diameters))
pop_np = axon_population()
pop_np.create_population_from_data(data)
pop_np.axon_pop
types diameters
0 1.0 9.291953
1 0.0 7.909397
2 1.0 17.291623
3 0.0 11.178241
4 0.0 16.070718
5 0.0 5.375868
6 0.0 0.803587
7 0.0 15.427616
8 0.0 0.531301
9 1.0 7.750653


When data are in a dict

data = {"types":ax_type, "diameters":ax_diameters, "other_key":0}
pop_dict = axon_population()
pop_dict.create_population_from_data(data)
pop_dict.axon_pop
types diameters
0 1 9.291953
1 0 7.909397
2 1 17.291623
3 0 11.178241
4 0 16.070718
5 0 5.375868
6 0 0.803587
7 0 15.427616
8 0 0.531301
9 1 7.750653


When data are in a dataframe

data = DataFrame({"types":ax_type, "diameters":ax_diameters, "other_key":np.random.rand(len(ax_type))})
pop_df = axon_population()
pop_df.create_population_from_data(data)
pop_df.axon_pop
types diameters
0 1 9.291953
1 0 7.909397
2 1 17.291623
3 0 11.178241
4 0 16.070718
5 0 5.375868
6 0 0.803587
7 0 15.427616
8 0 0.531301
9 1 7.750653


Generate population from data

Small 20-axons population

n_ax = 20

pop_stat = axon_population()
pop_stat.create_population_from_stat(n_ax=n_ax)
pop_stat.axon_pop
types diameters
0 0.0 2.163126
1 0.0 1.512224
2 0.0 1.058918
3 0.0 2.506012
4 0.0 1.576152
5 1.0 7.434870
6 0.0 1.215832
7 0.0 0.907816
8 1.0 2.865731
9 0.0 1.076353
10 0.0 1.413427
11 1.0 3.170341
12 0.0 1.262325
13 1.0 7.168337
14 0.0 0.872946
15 1.0 2.408818
16 0.0 0.791583
17 0.0 1.239078
18 0.0 1.709820
19 1.0 3.589178


Histograms

fig, axs = plt.subplots(2, 2,  layout="constrained")
for _i, n_ax in enumerate([20, 200, 2000, 20000]):
    ax = axs[_i%2, _i//2]
    pop_stat = axon_population()
    pop_stat.create_population_from_stat(n_ax=n_ax)
    pop_stat.hist(axes=ax, unmyel_color=("r",.4), myel_color=("b",.4), bins=50)
    ax.set_title(f"{n_ax} axons population")
    ax.set_xlabel("diameter")
    ax.set_ylabel("axons number")

plt.show()
20 axons population, 2000 axons population, 200 axons population, 20000 axons population

Total running time of the script: (0 minutes 0.374 seconds)