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[英]Plotting the mean of multiple columns including standard deviation in Python (Seaborn)
[英]Standard Deviation Python Plotting
我需要一些快速幫助來繪制我從代碼中得到的答案。 盡管如此,我還是很陌生,我正在嘗試計算計算答案的標准偏差,然后我需要將剛剛執行的標准偏差計算的新答案繪制到圖形中。 問題在於,在執行計算之前就出現了一個圖,只是給出了一個空圖,然后允許運行代碼。 任何幫助將不勝感激。
from numpy import zeros
from random import choice, random
import math
def create_lattice(nx,ny):
possibleSpins = (-1,1)
lattice = zeros((nx,ny))
for i in range(nx):
for j in range(ny):
lattice[i][j] = choice(possibleSpins)
return lattice
def magnetization(nx, ny, lattice):
magnet = 0.0
for i in range(nx):
for j in range(ny):
magnet += (lattice[i][j]/(nx*ny))
return magnet
def ising_model(nsweeps, nx, ny, Js):
magnet = 0.0
s_energy = 0.0
e_energy = 0.0
d_energy = 0.0
spin = 0.0
rand = 0.0
good = 0.0
bad = 0.0
nostep = 0.0
lattice = create_lattice(nx, ny)
magnet = magnetization(nx, ny, lattice)
energies = zeros((nx,ny))
print(lattice)
# Each sweep is a complete look at the lattice
for sweeps in range(nsweeps):
for i in range(nx):
for j in range(ny):
spin = lattice[i][j]
s_energy = -1 * Js * spin * (lattice[(i-1)][j] + lattice[i][(j-1)] + lattice[i][(j+1)%ny] + lattice[(i+1)%nx][j])
lattice[i][j] = -1 * spin
e_energy = -1 * Js * lattice[i][j] * (lattice[(i-1)][j] + lattice[i][(j-1)] + lattice[i][(j+1)%ny] + lattice[(i+1)%nx][j])
d_energy = e_energy - s_energy
rand = random()
if d_energy <= 0 :
good = good + 1
magnet += ((-2*spin)/(nx*ny))
answers.append(magnet)
elif d_energy > 0 and rand <= math.exp(-1 * d_energy):
bad = bad + 1
magnet += ((-2*spin)/(nx*ny))
answers.append(magnet)
else:
lattice[i][j] = spin
nostep = nostep + 1
print(magnet)
print(lattice)
print(good)
print(bad)
print(nostep)
# energies array is
return energies
answers = []
stdofmag = []
def standard_deviation():
stdmag = statistics.stdev(answers)
print(stdmag)
stdofmag.append(stdmag)
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
ax.plot(stdofmag, 'r-', label = "Std of Magnetization")
title_temp = "Magnetization"
plt.title(title_temp, fontsize=12, fontweight='bold', color='green')
ax.legend(loc='best', ncol=1, fancybox=True, shadow=True)
plt.xlabel('Number of Iterations')
plt.ylabel('Answer')
ax.grid(True)
plt.show(block=True)
忽略x和y標簽是虛擬變量。
您從未調用過standard_deviation
函數,因此在將它傳遞給plot
時stdofmag=[]
為空列表
您的stdofmag
變量是一個空列表,因此您沒有進行任何繪圖。 您編寫的腳本實際上並沒有做任何工作,只是創建一個設置一些標簽的圖形並顯示它。 您需要實際調用您定義的函數才能填充列表。 話雖如此,我仍然可以看到許多其他錯誤,這些錯誤將阻止這些功能按您的預期工作。 最好退后一步,確保每個功能都按預期運行,然后再嘗試連接所有功能。
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