def process(data, learning_rate, num_iter, degree, Islasso, Isdegree):
# Training data part
(training_data, validation_data, testing_data,
x_shuffled) = pre_processing.train_test_split(data, degree)
x = training_data[:, :-1]
y_org = training_data[:, -1]
y_org = np.reshape(y_org, (x.shape[0], 1))
lambdas = []
betas = []
error_in_train = 0
temp = []
error_in_validation = 0
error_in_test = 0
for j in range(0, 10):
lam = random.random()
lambdas.append(lam)
beta = gd(x, y_org, learning_rate, num_iter, lam, Islasso, Isdegree)
betas.append(beta)
x_validate = validation_data[:, :-1]
y_validate_org = validation_data[:, -1]
for beta in betas:
y_validate = x_validate.dot(beta)
temp.append(error(y_validate_org, y_validate))
min_index = temp.index(min(temp))
min_lambda = lambdas[min_index]
min_beta = betas[min_index]
error_in_train = error(x.dot(min_beta), y_org)
error_in_validation = error(x_validate.dot(min_beta), y_validate_org)
# Test data part
x_test = testing_data[:, :-1]
y_test = testing_data[:, -1]
error_in_test = error(x_test.dot(min_beta), y_test)
return min_lambda, min_beta, error_in_train, error_in_validation, error_in_test
def process(data, learning_rate, num_iter,degree,Islasso,Isdegree):
# Training data part
(training_data,validation_data,testing_data,x_shuffled)=pre_processing.train_test_split(data,degree)
x=training_data[:,:-1]
y_org=training_data[:,-1]
y_org=np.reshape(y_org,(x.shape[0],1))
lambdas=[]
betas=[]
error_in_train=0
temp=[]
error_in_validation=0
error_in_test=0
for j in range(0,10):
lam=random.random()
lambdas.append(lam)
beta = gd(x, y_org, learning_rate, num_iter,lam,Islasso,Isdegree)
betas.append(beta)
x_validate=validation_data[:,:-1]
y_validate_org=validation_data[:,-1]
for beta in betas:
y_validate=x_validate.dot(beta)
temp.append(error(y_validate_org,y_validate))
min_index=temp.index(min(temp))
min_lambda=lambdas[min_index]
min_beta=betas[min_index]
error_in_train=error(x.dot(min_beta),y_org)
error_in_validation=error(x_validate.dot(min_beta),y_validate_org)
# Test data part
x_test=testing_data[:,:-1]
y_test=testing_data[:,-1]
error_in_test=error(x_test.dot(min_beta),y_test)
minval=np.amin(data[:,-1])
maxval=np.amax(data[:,-1])
z = x.dot(min_beta)
z= minval + z*(maxval-minval)
# Creating figure
fig = plt.figure()
ax = fig.gca(projection ="3d")
xx = x_shuffled[:,0]
yy = x_shuffled[:,1]
z = np.asarray(z).squeeze()
ax.plot_trisurf(xx, yy, z, edgecolor='none', cmap='viridis')
# ax.scatter3D(xx, yy, y_org, color = 'violet')
plt.title("3D surface plot for degree " + str(degree))
# show plot
plt.xlabel("Age")
plt.ylabel("BMI")
ax.set_zlabel('Predicted Insurance Cost')
plt.show()
plt.close()
return min_lambda,min_beta,error_in_train,error_in_validation,error_in_test
def process(data, learning_rate, num_iter, isPlot):
# Training data part
(training_data, testing_data) = pre_processing.train_test_split(data)
x = training_data[:, 0:3]
y_train_org = training_data[:, 3]
ones = np.ones((x.shape[0], 1))
x = np.append(ones, x, axis=1)
y_train_org = np.reshape(y_train_org, (x.shape[0], 1))
beta = sgd(x, y_train_org, learning_rate, num_iter, isPlot)
y_train = x.dot(beta)
error_in_train = error(y_train, y_train_org)
# Test data part
x_test = testing_data[:, 0:3]
y_test_org = testing_data[:, 3]
ones = np.ones((x_test.shape[0], 1))
x_test = np.append(ones, x_test, axis=1)
y_test = x_test.dot(beta)
error_in_test = error(y_test_org, y_test)
return (error_in_train, error_in_test)
import numpy as np
import pre_processing
from numpy.linalg import inv
from matplotlib import pyplot
def error(y, yi):
return (np.mean((y - yi)**2))**(1 / 2)
data = pd.read_csv("insurance.txt").to_numpy()
data = pre_processing.standardization(data)
all_errors_train = []
all_errors_test = []
for i in range(0, 20):
(training_data, testing_data) = pre_processing.train_test_split(data)
x = training_data[:, 0:3]
y_org = training_data[:, 3]
y_org = np.reshape(y_org, (len(y_org), 1))
ones = np.ones((x.shape[0], 1))
x = np.append(ones, x, axis=1)
beta = inv(x.T.dot(x)).dot(x.T).dot(y_org)
y_train = x.dot(beta)
all_errors_train.append(error(y_org, y_train))
y_org_test = testing_data[:, 3]
x_test = testing_data[:, 0:3]
ones = np.ones((x_test.shape[0], 1))
x_test = np.append(ones, x_test, axis=1)
y_test = x_test.dot(beta)
all_errors_test.append(error(y_org_test, y_test))
#----------------------------------------PEARSON-----------------------------------------------------
pearson_matrix = ps.pearson_correlation(wind_turbine)
result = ps.transform_value(pearson_matrix)
result = result.astype(float)
#gr.seaborn_pearson_plot(result)
#----------------------------------------PEARSON-----------------------------------------------------
#-----------------------------------FILLNaNVALUES AND SELECT TARGET----------------------------------
wind_turbine = pre.fill_NaN_values(wind_turbine.copy())
y_train = pre.select_y(wind_turbine)
wind_turbine = wind_turbine.drop('Rbt_avg', axis=1)
#-----------------------------------FILLNaNVALUES AND SELECT TARGET----------------------------------
#-----------------------------------SPLIT AND STANDARIZE DATA ---------------------------------------
x_train, x_test, y_train, y_test = pre.train_test_split(wind_turbine, y_train)
x_train = pre.standardize(x_train)
x_test = pre.standardize(x_test)
#-----------------------------------SPLIT AND STANDARIZE DATA ---------------------------------------
#-----------------------------------PLOT ORIGINAL AND STANDAR DATA ---------------------------------
ba_avg_data_graph = wind_turbine.Ba_avg.head(300)
gr.linear_graph_unique(ba_avg_data_graph)
one_column_select = x_train[0:300, 0:1]
gr.linear_graph_unique(
one_column_select
) #[start_row_index:end_row_index, start_column_index:end_column_index]
one_column_select = pre.remove_noise(one_column_select.copy())
display(one_column_select)