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@karpathy
karpathy / gist:587454dc0146a6ae21fc
Last active May 14, 2025 00:08
An efficient, batched LSTM.
"""
This is a batched LSTM forward and backward pass
"""
import numpy as np
import code
class LSTM:
@staticmethod
def init(input_size, hidden_size, fancy_forget_bias_init = 3):
@RadhikaG
RadhikaG / heapClass.py
Last active December 13, 2017 04:04
A class to demonstrate the different operations on heaps.
def parent(i):
return i/2
def left(i):
return 2*i
def right(i):
return (2*i + 1)
class Heap:
@danijar
danijar / blog_tensorflow_sequence_classification.py
Last active December 24, 2021 03:53
TensorFlow Sequence Classification
# Example for my blog post at:
# https://danijar.com/introduction-to-recurrent-networks-in-tensorflow/
import functools
import sets
import tensorflow as tf
def lazy_property(function):
attribute = '_' + function.__name__
@pranv
pranv / lstm.py
Last active July 6, 2017 11:48
An Efficient, Batched, Stateful LSTM layer in Numpy
import numpy as np
from utils import orthogonal, tanh, sigmoid, dtanh, dsigmoid
class LSTM(object):
"""Long Short Term Memory Unit
Parameters
----------
@j314erre
j314erre / text_cnn.py
Created July 13, 2016 00:00
load pre-trained word2vec into cnn-text-classification-tf
import tensorflow as tf
import numpy as np
class TextCNN(object):
"""
A CNN for text classification.
Uses an embedding layer, followed by a convolutional, max-pooling and softmax layer.
"""
def __init__(
@gyglim
gyglim / tensorboard_logging.py
Last active August 23, 2023 21:29
Logging to tensorboard without tensorflow operations. Uses manually generated summaries instead of summary ops
"""Simple example on how to log scalars and images to tensorboard without tensor ops.
License: BSD License 2.0
"""
__author__ = "Michael Gygli"
import tensorflow as tf
from StringIO import StringIO
import matplotlib.pyplot as plt
import numpy as np
@fasiha
fasiha / posdef.py
Last active August 2, 2025 11:17
Python/Numpy port of John D’Errico’s implementation (https://www.mathworks.com/matlabcentral/fileexchange/42885-nearestspd) of Higham’s 1988 paper (https://doi.org/10.1016/0024-3795(88)90223-6), including a built-in unit test. License: whatever D’Errico’s license, since this is a port of that.
from numpy import linalg as la
import numpy as np
def nearestPD(A):
"""Find the nearest positive-definite matrix to input
A Python/Numpy port of John D'Errico's `nearestSPD` MATLAB code [1], which
credits [2].
@joelthchao
joelthchao / demo.py
Last active August 31, 2021 18:02
Keras uses TensorBoard Callback with train_on_batch
import numpy as np
import tensorflow as tf
from keras.callbacks import TensorBoard
from keras.layers import Input, Dense
from keras.models import Model
def write_log(callback, names, logs, batch_no):
for name, value in zip(names, logs):
summary = tf.Summary()
import tensorflow as tf
import numpy as np
class ConvolutionalAttentionNLI(object):
def __init__(self, embeddings_shape, target_classes=2, conv_filter_size=3, conv_projection_size=300, attention_output_size=200, comparison_output_size=100, learning_rate=0.05):
self._embeddings_shape = embeddings_shape
self._target_classes = target_classes
self._conv_filter_size = conv_filter_size
self._conv_projection_size = conv_projection_size
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