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How can Tensorflow be used with premade estimator to download the Iris dataset?
Tensorflow can be used with premade estimator to download the iris dataset using the ‘get_file’ method present in Keras package. A Google API holds the iris dataset, which can be passed as parameter to the ‘get_file’ method.
We will use the Keras Sequential API, which is helpful in building a sequential model that is used to work with a plain stack of layers, where every layer has exactly one input tensor and one output tensor.
A neural network that contains at least one layer is known as a convolutional layer. We can use the Convolutional Neural Network to build learning model.
TensorFlow Text contains collection of text related classes and ops that can be used with TensorFlow 2.0. The TensorFlow Text can be used to preprocess sequence modelling.
We are using the Google Colaboratory to run the below code. Google Colab or Colaboratory helps run Python code over the browser and requires zero configuration and free access to GPUs (Graphical Processing Units). Colaboratory has been built on top of Jupyter Notebook.
Let us understand how Estimators can be used.
An Estimator is TensorFlow's high-level representation of a complete model. It is designed for easy scaling and asynchronous training.
The model is trained using iris data set. There are 4 features, and one label.
- sepal length
- sepal width
- petal length
- petal width
Based on this information, some constants can be defined that help in parsing data.
import tensorflow as tf import pandas as pd print("Column names defined") CSV_COLUMN_NAMES = ['SepalLength', 'SepalWidth', 'PetalLength', 'PetalWidth', 'Species'] SPECIES = ['Setosa', 'Versicolor', 'Virginica'] print("Iris training data is being downloaded") train_path = tf.keras.utils.get_file( "iris_training.csv", "https://storage.googleapis.com/download.tensorflow.org/data/iris_training.csv") print("Iris test data is being downloaded") test_path = tf.keras.utils.get_file( "iris_test.csv", "https://storage.googleapis.com/download.tensorflow.org/data/iris_test.csv") train = pd.read_csv(train_path, names=CSV_COLUMN_NAMES, header=0) test = pd.read_csv(test_path, names=CSV_COLUMN_NAMES, header=0) print("Sample data is being displayed") train.head()
Column names defined Iris training data is being downloaded Downloading data from https://storage.googleapis.com/download.tensorflow.org/data/iris_training.csv 8192/2194 [================================================================================================================] - 0s 0us/step Iris test data is being downloaded Downloading data from https://storage.googleapis.com/download.tensorflow.org/data/iris_test.csv 8192/573 [============================================================================================================================================================================================================================================================================================================================================================================================================================================] - 0s 0us/step Sample data is being displayed SepalLength SepalWidth PetalLength PetalWidth Species 0 6.4 2.8 5.6 2.2 2 1 5.0 2.3 3.3 1.0 1 2 4.9 2.5 4.5 1.7 2 3 4.9 3.1 1.5 0.1 0 4 5.7 3.8 1.7 0.3 0
- Column names are defined.
- The data is downloaded.
- Some sample data is displayed on the console.
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