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style: main function

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This commit is contained in:
Ting-Jun Wang 2023-11-15 15:51:07 +08:00
parent 2e5fcb284f
commit a6b88f3f9b
Signed by: snsd0805
GPG Key ID: D175E969960C4B16
1 changed files with 25 additions and 23 deletions
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48
hw4/hw4_10.py
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@ -14,7 +14,7 @@ def read_data(filename):
y.append(int(numbers[-1]))
return x, y
def format(features):
def form(features):
'''
change to LIBSVM format
'''
@ -33,31 +33,33 @@ def error(gt, pred):
err = (err+1) if gt[index]!=pred[index] else err
return err/len(gt)
x, y = read_data(FILENAME)
x = format(x)
prob = problem(y, x)
lambda_powers = [-6, -4, -2, 0, 2]
if __name__ == '__main__':
x, y = read_data(FILENAME)
x = form(x)
prob = problem(y, x)
lambda_powers = [-6, -4, -2, 0, 2]
results = []
for lambda_power in lambda_powers:
lambda_value = 10 ** lambda_power
param_C = 1/(2*lambda_value)
param = parameter('-s 0 -c {} -e 0.000001 -q'.format(param_C))
model = train(prob, param)
p_label, p_acc, p_val = predict(y, x, model)
err = error(y, p_label)
print("0/1 error: ", err)
print()
results.append({'lambda': lambda_power, 'error': err})
results = []
for lambda_power in lambda_powers:
lambda_value = 10 ** lambda_power
param_C = 1/(2*lambda_value)
param = parameter('-s 0 -c {} -e 0.000001 -q'.format(param_C))
model = train(prob, param)
p_label, p_acc, p_val = predict(y, x, model)
err = error(y, p_label)
print("0/1 error: ", err)
print()
results.append({'lambda': lambda_power, 'error': err})
ans, min_err = None, 1
for i in results:
if i['error'] <= min_err:
min_err = i['error']
ans = i
ans, min_err = None, 1
for i in results:
print(i['error'])
if i['error'] <= min_err:
min_err = i['error']
ans = i
print("the largest lambda: {}, log_10(lambda*): {}".format(10**ans['lambda'], ans['lambda']))
print("the largest lambda: {}, log_10(lambda*): {}".format(10**ans['lambda'], ans['lambda']))