Create an input layer with multiple columns

In this exercise, you will look at a different way to create models with multiple inputs. This method only works for purely numeric data, but its a much simpler approach to making multi-variate neural networks.

Now you have three numeric columns in the tournament dataset: 'seed_diff', 'home', and 'pred'. In this exercise, you will create a neural network that uses a single input layer to process all three of these numeric inputs.

This model should have a single output to predict the tournament game score difference.

This exercise is part of the course

Advanced Deep Learning with Keras

Exercise instructions

Create a single input layer with 3 columns.
Connect this input to a Dense layer with 1 unit.
Create a model with input_tensor as the input and output_tensor as the output.
Compile the model with 'adam' as the optimizer and 'mean_absolute_error' as the loss function.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Create an input layer with 3 columns
input_tensor = ____((____,))

# Pass it to a Dense layer with 1 unit
output_tensor = ____(____)(____)

# Create a model
model = ____(____, ____)

# Compile the model
____.____(optimizer=____, loss=____)

Edit and Run Code

This exercise is part of the course

Advanced Deep Learning with Keras

IntermediateSkill Level

4.8+

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In this chapter, you'll become familiar with the basics of the Keras functional API. You'll build a simple functional network using functional building blocks, fit it to data, and make predictions.

Exercise 1: Keras input and dense layers Exercise 2: Input layers Exercise 3: Dense layers Exercise 4: Output layers Exercise 5: Build and compile a model Exercise 6: Build a model Exercise 7: Compile a model Exercise 8: Visualize a model Exercise 9: Fit and evaluate a model Exercise 10: Fit the model to the tournament basketball data Exercise 11: Evaluate the model on a test set

In this chapter, you will build two-input networks that use categorical embeddings to represent high-cardinality data, shared layers to specify re-usable building blocks, and merge layers to join multiple inputs to a single output. By the end of this chapter, you will have the foundational building blocks for designing neural networks with complex data flows.

Exercise 1: Category embeddings Exercise 2: Define team lookup Exercise 3: Define team model Exercise 4: Shared layers Exercise 5: Defining two inputs Exercise 6: Lookup both inputs in the same model Exercise 7: Merge layers Exercise 8: Output layer using shared layer Exercise 9: Model using two inputs and one output Exercise 10: Predict from your model Exercise 11: Fit the model to the regular season training data Exercise 12: Evaluate the model on the tournament test data

In this chapter, you will extend your 2-input model to 3 inputs, and learn how to use Keras' summary and plot functions to understand the parameters and topology of your neural networks. By the end of the chapter, you will understand how to extend a 2-input model to 3 inputs and beyond.

Exercise 1: Three-input models Exercise 2: Make an input layer for home vs. away Exercise 3: Make a model and compile it Exercise 4: Fit the model and evaluate Exercise 5: Summarizing and plotting models Exercise 6: Model summaries Exercise 7: Plotting models Exercise 8: Stacking models Exercise 9: Add the model predictions to the tournament data Exercise 10: Create an input layer with multiple columns

Current Exercise

Exercise 11: Fit the model Exercise 12: Evaluate the model

In this chapter, you will build neural networks with multiple outputs, which can be used to solve regression problems with multiple targets. You will also build a model that solves a regression problem and a classification problem simultaneously.

Exercise 1: Two-output models Exercise 2: Simple two-output model Exercise 3: Fit a model with two outputs Exercise 4: Inspect the model (I)Exercise 5: Evaluate the model Exercise 6: Single model for classification and regression Exercise 7: Classification and regression in one model Exercise 8: Compile and fit the model Exercise 9: Inspect the model (II)Exercise 10: Evaluate on new data with two metrics Exercise 11: Wrap-up