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import numpy as np
#import matplotlib as mpl
#mpl.use('Agg')
import matplotlib.pyplot as plt
import metrics
class ConfidenceHistogram(metrics.MaxProbCELoss):
def plot(self, output, labels, n_bins = 15, logits = True, title = None):
super().loss(output, labels, n_bins, logits)
#scale each datapoint
n = len(labels)
w = np.ones(n)/n
plt.rcParams["font.family"] = "serif"
#size and axis limits
plt.figure(figsize=(4,3))
plt.xlim(0,1)
plt.ylim(0,1)
plt.xticks([0.0, 0.2, 0.4, 0.6, 0.8, 1.0], ['0.0', '0.2', '0.4', '0.6', '0.8', '1.0'])
plt.yticks([0.0, 0.2, 0.4, 0.6, 0.8, 1.0], ['0.0', '0.2', '0.4', '0.6', '0.8', '1.0'])
#plot grid
plt.grid(color='tab:grey', linestyle=(0, (1, 5)), linewidth=1,zorder=0)
#plot histogram
plt.hist(self.confidences,n_bins,weights = w,color='b',range=(0.0,1.0),edgecolor = 'k')
#plot vertical dashed lines
acc = np.mean(self.accuracies)
conf = np.mean(self.confidences)
plt.axvline(x=acc, color='tab:grey', linestyle='--', linewidth = 3)
plt.axvline(x=conf, color='tab:grey', linestyle='--', linewidth = 3)
if acc > conf:
plt.text(acc+0.03,0.4,'Accuracy',rotation=90,fontsize=11)
plt.text(conf-0.07,0.4,'Avg. Confidence',rotation=90, fontsize=11)
else:
plt.text(acc-0.07,0.4,'Accuracy',rotation=90,fontsize=11)
plt.text(conf+0.03,0.4,'Avg. Confidence',rotation=90, fontsize=11)
plt.ylabel('% of Samples',fontsize=13)
plt.xlabel('Confidence',fontsize=13)
plt.tight_layout()
if title is not None:
plt.title(title,fontsize=16)
return plt
class ReliabilityDiagram(metrics.MaxProbCELoss):
def plot(self, output, labels, n_bins = 15, logits = True, title = None):
super().loss(output, labels, n_bins, logits)
#computations
delta = 1.0/n_bins
x = np.arange(0,1,delta)
mid = np.linspace(delta/2,1-delta/2,n_bins)
error = np.concatenate((np.zeros(shape=7), np.abs(np.subtract(mid[7:],self.bin_acc[7:]))))
plt.rcParams["font.family"] = "serif"
#size and axis limits
plt.figure(figsize=(4,4))
plt.xlim(0,1)
plt.ylim(0,1)
#plot grid
plt.grid(color='tab:grey', linestyle=(0, (1, 5)), linewidth=1,zorder=0)
#plot bars and identity line
plt.bar(x, self.bin_acc, color = 'b', width=delta,align='edge',edgecolor = 'k',label='Outputs',zorder=5)
plt.bar(x, error, bottom=np.minimum(self.bin_acc,mid), color = 'mistyrose', alpha=0.5, width=delta,align='edge',edgecolor = 'r',hatch='/',label='Gap',zorder=10)
ident = [0.0, 1.0]
plt.plot(ident,ident,linestyle='--',color='tab:grey',zorder=15)
#labels and legend
plt.ylabel('Accuracy',fontsize=13)
plt.xlabel('Confidence',fontsize=13)
plt.legend(loc='upper left',framealpha=1.0,fontsize='medium')
if title is not None:
plt.title(title,fontsize=16)
plt.tight_layout()
return plt
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