def calculate_ranks(figure_path, data_frame, algorithm_analyzed):
data_frame = data_frame.iloc[:, 1:-1]
names = data_frame.columns
flat_values = data_frame[names].values
ranks = np.array([stats.rankdata(array) for array in -flat_values])
# Calculating the average ranks.
average_ranks = np.mean(ranks, axis=0)
print('\n'.join('{} average rank: {}'.format(a, r)
for a, r in zip(names, average_ranks)))
cd = compute_CD(average_ranks,
n=len(flat_values),
alpha='0.05',
test='nemenyi')
print(f'CD: {cd}')
graph_ranks(
average_ranks,
names=[og_name + '_' + algorithm_analyzed for og_name in names],
cd=cd,
textspace=1.5,
width=6)
cd_data_frame = pd.DataFrame(columns=['algorithm', 'rank'])
cd_data_frame['algorithm'] = names.values
cd_data_frame['rank'] = average_ranks
cd_data_frame.to_csv(figure_path + '\\avg_ranks_' + algorithm_analyzed +
'.csv',
sep=';')
plt.savefig(figure_path + '\\cd_plot_' + algorithm_analyzed + '.pdf',
bbox_inches='tight')
plt.show()
def cd_diagram(df, filename_to_save):
df_pivoted = df.pivot(index='dataset', columns='index', values='acc_mean')
#ranks (tipo de classificador, parametro)
ranks = util.rank_accuracy(df_pivoted)
ranks = ranks.mean(axis=0).sort_values()#rank médio
ranks = ranks.rename('rank')
avgranks = ranks.tolist()
names = ranks.index.tolist()
cd = compute_CD(avgranks, 10)
graph_ranks(avgranks, names, cd=cd, filename=filename_to_save)
plt.show()
def plot_comparisons(self, fried_result, names, cd, cd1, average_ranks):
# This method generates the plot.
graph_ranks(average_ranks, names=names,
cd=cd, width=8, textspace=1.5)
plt.title(f'Friedman-Nemenyi={round(fried_result.pvalue, 4)}\nCD={round(cd, 3)}')
plt.show()
# This method generates the plot.
graph_ranks(average_ranks, names=names,
cd=cd1, cdmethod=0, width=8, textspace=1.5)
plt.title(f'Bonferroni-Dunn\nCD={round(cd1, 3)}')
plt.show()
return
def gerar_plot(self, nome, caminho):
#emparelhando as acuracias de cada modelo
#print(friedmanchisquare(self._data[0], self._data[1], self._data[2], self._data[3], self._data[4], self._data[5]))
#obtendo os rankins dos modelos e os pvalues
meanRanks, pValues = self.do()
#print("Média dos rankings: ")
#print(meanRanks)
#print("Pvalues: ")
#print(pValues)
#computando as estatisticas a partir do rank dos modelos
cd = ora.compute_CD(meanRanks, len(self._data[0]), alpha="0.05", test="nemenyi")
# criando o plot com os rankings, labels e distancia critica
ora.graph_ranks(meanRanks, self.labels, cd=cd, width=10, textspace=2)
# salvando a figura
plt.savefig(caminho+nome)
print("Teste gerado!")
from scipy.stats import rankdata
from Orange.evaluation import graph_ranks, compute_CD
import matplotlib.pyplot as plt
# Para 4 clasificadores en nemenyi
q = 2.569
classifiers = 4
datasets = 10
cd = q * np.sqrt((classifiers * (classifiers + 1)) / (6 * datasets))
print(cd)
df = pd.read_csv('decisiontree.csv', header=0, index_col=0)
df1 = pd.read_csv('multiclass.csv', header=0, index_col=0)
data = df.to_numpy()
data = np.append(data, df1.to_numpy(), axis=1)
ranking = np.zeros(shape=data.shape)
for i in range(ranking.shape[0]):
ranking[i, :] = rankdata(data[i, :])
final = np.copy(ranking.mean(axis=0))
names = ['DecisionTree', 'OVO', 'OVR', 'ECOC']
graph_ranks(list(final), names, cd)
plt.show()
#sign test F1-score
#performances = pd.DataFrame({'dataset':['df1', 'df2', 'df3', 'df4', 'df5', 'df6', 'df7', 'df8', 'df9', 'df10', 'df11'],'ORANGE': f1_orange, 'XGB': f1_xgb, 'RF': f1_rf, 'SVM': f1_svm, 'LR': f1_lr})
# First, we extract the algorithms names.
algorithms_names = performances.drop('dataset', axis=1).columns
print(algorithms_names)
# Then, we extract the performances as a numpy.ndarray.
performances_array = performances[algorithms_names].values
print(performances_array)
# Finally, we apply the Friedman test.
print(friedmanchisquare(*performances_array))
ranks = np.array([rankdata(-p) for p in performances_array])
# Calculating the average ranks.
average_ranks = np.mean(ranks, axis=0)
print('\n'.join('{} average rank: {}'.format(a, r)
for a, r in zip(algorithms_names, average_ranks)))
cd = compute_CD(average_ranks,
n=len(performances),
alpha='0.05',
test='nemenyi')
# This method generates the plot.
graph_ranks(average_ranks,
names=algorithms_names,
cd=cd,
width=10,
textspace=3,
reverse=True)
plt.show()
for result_key in classifier_results.keys():
if 'RFE' in result_key:
continue
if classifier_name in result_key:
results.append(
np.array(classifier_results[result_key][SCORING_METRIC]).mean())
algorithm_averages[classifier_name] = np.array(results).mean()
log(algorithm_averages)
# compute Friedmans and CD for all except RFE, since we can't apply it
# to all of the algorithms
cd = compute_CD(algorithm_averages.values(),
len(FILES) * (len(feature_selectors) - 1))
log("Critical differences: {}".format(cd))
graph_ranks(algorithm_averages.values(),
list(algorithm_averages.keys()), cd=cd, width=6, textspace=1.5)
plt.savefig(OUTPUT_DIR + os.path.sep + 'nemenyi.png')
log("Dataset results")
log(algorithm_dataset_results)
log('\n')
friedman = stats.friedmanchisquare(*algorithm_dataset_results.values())
log("Friedmans': {}, pvalue: {}".format(
friedman.statistic, friedman.pvalue))
log('\nDONE')
print('\n'.join('{} average rank: {}'.format(a, r)
for a, r in zip(algorithms, average_ranks)))
names = [
algorithms[i] + ' - ' + str(round(average_ranks[i], 3))
for i in range(len(average_ranks))
]
# This method computes the critical difference for Nemenyi test with alpha=0.1.
# For some reason, this method only accepts alpha='0.05' or alpha='0.1'.
cd = compute_CD(average_ranks,
n=len(results_array),
alpha='0.05',
test='nemenyi')
# This method generates the plot.
graph_ranks(average_ranks, names=names, cd=cd, width=6, textspace=1.5)
plt.title(
f'Friedman-Nemenyi={round(friedmanchisquare(*results_array).pvalue, 4)}\nCD={round(cd, 3)}'
)
plt.show()
# This method computes the critical difference for Bonferroni-Dunn test with alpha=0.05.
# For some reason, this method only accepts alpha='0.05' or alpha='0.1'.
cd = compute_CD(average_ranks,
n=len(results_array),
alpha='0.05',
test='bonferroni-dunn')
# This method generates the plot.
graph_ranks(average_ranks,
names=names,
cd=cd,
def plot__nemenyi(gen, ranks, techniques, noise):
cd = compute_CD(ranks, 30, alpha="0.05")
graph_ranks(ranks, techniques, cd=cd, width=len(techniques), textspace=1.5)
save_pdf(plt, root + '/Graphs/' + '/Nemenyi/' + gen + '/', 'Nemenyi_' + noise)