mlp-california-housing

mlp-california-housing

A multi-layer perceptron (MLP) trained on the California Housing dataset.

It takes eight inputs: 'MedInc', 'HouseAge', 'AveRooms', 'AveBedrms', 'Population', 'AveOccup', 'Latitude' and 'Longitude'. It predicts 'MedHouseVal'.

It is a PyTorch adaptation of the TensorFlow model in Chapter 10 of Aurelien Geron's book 'Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow'.

Code: https://github.com/sambitmukherjee/handson-ml3-pytorch/blob/main/chapter10/mlp_california_housing.ipynb

Experiment tracking: https://wandb.ai/sadhaklal/mlp-california-housing

Usage

from sklearn.datasets import fetch_california_housing

housing = fetch_california_housing(as_frame=True)

from sklearn.model_selection import train_test_split

X_train_full, X_test, y_train_full, y_test = train_test_split(housing['data'], housing['target'], test_size=0.25, random_state=42)
X_train, X_valid, y_train, y_valid = train_test_split(X_train_full, y_train_full, test_size=0.25, random_state=42)

X_means, X_stds = X_train.mean(axis=0), X_train.std(axis=0)
X_train = (X_train - X_means) / X_stds
X_valid = (X_valid - X_means) / X_stds
X_test = (X_test - X_means) / X_stds

import torch

device = torch.device("cpu")

import torch.nn as nn
from huggingface_hub import PyTorchModelHubMixin

class MLP(nn.Module, PyTorchModelHubMixin):
    def __init__(self):
        super().__init__()
        self.fc1 = nn.Linear(8, 50)
        self.fc2 = nn.Linear(50, 50)
        self.fc3 = nn.Linear(50, 50)
        self.fc4 = nn.Linear(50, 1)

    def forward(self, x):
        act = torch.relu(self.fc1(x))
        act = torch.relu(self.fc2(act))
        act = torch.relu(self.fc3(act))
        return self.fc4(act)

model = MLP.from_pretrained("sadhaklal/mlp-california-housing")
model.to(device)
model.eval()

# Let's predict on 3 unseen examples from the test set:
print(f"Ground truth housing prices: {y_test.values[:3]}")
x_new = torch.tensor(X_test.values[:3], dtype=torch.float32)
x_new = x_new.to(device)
with torch.no_grad():
    preds = model(x_new)
print(f"Predicted housing prices: {preds.squeeze()}")

Metric

RMSE on the test set: 0.5502

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This model has been pushed to the Hub using the PyTorchModelHubMixin integration.