随笔分类 - Python
摘要：Global Statistics: Common seen methods as such 1. Mean 2. Median 3. Standard deviation: the larger the number means it various a lot. 4. Sum. Rolling
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摘要：NumPy Reference: Indexing Integer array indexing Boolean array indexing Note: The expression a < mean produces a boolean array, like:
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摘要：NumPy Reference: Indexing Integer array indexing: Select array elements with another array
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摘要：NumPy Reference: Indexing Note: Indexing starts at 0 (zero). def slicing(): a = np.random.rand(5,4) print(a) """ [[ 0.15372787 0.83347785 0.86855635 0
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摘要：NumPy Reference: Mathematical functions numpy.sum: Sum of elements - along rows, columns or all numpy.min, numpy.max, numpy.mean: Simple statistics Al
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摘要：Attributes of numpy.ndarray: numpy.ndarray.shape: Dimensions (height, width, ...) numpy.ndarray.ndim: No. of dimensions = len(shape) numpy.ndarray.siz
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摘要：import numpy as np def test_run(): data=np.random.random((3,4)) """ [[ 0.80150549 0.96756513 0.18914514 0.85937016] [ 0.23563908 0.75685996 0.46804508 0.91735016] [ 0.7054...
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摘要：It is easy to compare the data by normalize it.
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摘要：import os import pandas as pd import matplotlib.pyplot as plt def test_run(): start_date='2017-01-01' end_data='2017-12-15' dates=pd.date_range(start_
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摘要：For example we have dataframe like this: Now we only we want to get highlighted part: We can use Dataframe.ix[] method to get date related index data
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摘要：Create an empty Data frame with date index: Now we want to load SPY.csv and get 'Adj Close' column value and copy the range (11-21, 11-28) data to the
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摘要：Install:
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摘要：Object oriented classes work much like classes in other languages. Learn how to create them and use them, learn the difference between class variables
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摘要：Misunderstanding scope can cause problems in your application. Watch this lesson to learn how Python scope works and the hidden implications it presen
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摘要：Exceptions cause your application to crash. Handling them allows you to recover gracefully and keep your application running. Learn how to handle exce
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摘要：This lesson will teach you how to read the contents of an external file from Python. You will also learn how to use the python csv module to read and
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摘要：A module is a function extracted to a file. This allows you to import the function and use it in any other code you may write. You’ll learn how to cre
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摘要：Print statements will get you a long way in monitoring the behavior of your application, but logging will get your further. Learn how to implement log
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摘要：A set is an unordered collection with no duplicate items in Python. In this lesson, you will learn how to create them, and perform basic operations to
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摘要：Dictionaries may be familiar to you as hash maps. In this lesson, you will learn how to create them, get the values, and delete elements from the dict
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