Zhentiw - 博客园

2017年12月18日

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 阅读全文

posted @ 2017-12-18 21:08 Zhentiw 阅读(180) 评论(0) 推荐(0)

[React] Implement a Higher Order Component with Render Props

摘要： When making a reusable component, you'll find that people often like to have the API they're most familiar with, so in this lesson we'll recreate the 阅读全文

posted @ 2017-12-18 19:50 Zhentiw 阅读(217) 评论(0) 推荐(0)

[React] Implement a React Context Provider

摘要： If you have state that needs to exist throughout your application, then you may find yourself passing props all over the application and even "drillin 阅读全文

posted @ 2017-12-18 15:55 Zhentiw 阅读(256) 评论(0) 推荐(0)

2017年12月17日

[Python] Array Attributes of Numpy lib

摘要： Attributes of numpy.ndarray: numpy.ndarray.shape: Dimensions (height, width, ...) numpy.ndarray.ndim: No. of dimensions = len(shape) numpy.ndarray.siz 阅读全文

posted @ 2017-12-17 23:38 Zhentiw 阅读(231) 评论(0) 推荐(0)

[Python] Generating random numbers using numpy lib

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... 阅读全文

posted @ 2017-12-17 23:30 Zhentiw 阅读(287) 评论(0) 推荐(0)

[Python] Normalize the data with Pandas

摘要： It is easy to compare the data by normalize it. 阅读全文

posted @ 2017-12-17 23:02 Zhentiw 阅读(1861) 评论(0) 推荐(0)

[Python] Plotting multiple stocks

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_ 阅读全文

posted @ 2017-12-17 22:47 Zhentiw 阅读(458) 评论(0) 推荐(0)

[Python] Slice the data with pandas

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 阅读全文

posted @ 2017-12-17 22:35 Zhentiw 阅读(322) 评论(0) 推荐(0)

[Python] Pandas load DataFrames

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 阅读全文

posted @ 2017-12-17 02:12 Zhentiw 阅读(781) 评论(0) 推荐(0)

2017年12月15日

[Python] Read and plot data from csv file

摘要： Install: 阅读全文

posted @ 2017-12-15 20:58 Zhentiw 阅读(368) 评论(0) 推荐(0)

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