Programmer Think

01. Preface In the near future, it is expected that the emerging digital gene expression (DGE) technology will surpass microarray technology in many applications of functional genomics. One of the basic data analysis tasks, especially gene expression research, involves determining whether there is evidence that transcripts or exons are signifi ...

Original link: http://tecdat.cn/?p=18149Original source: Tuo end data tribal official accountDriverless cars can be traced back to 1989. Neural networks have existed for a long time. What are the reasons for the upsurge of artificial intelligence and deep learning in recent years? [1 second] part of the answer lies in Moore's law and the signif ...

1, Reptile preparation 1.1 climbing target The target of the public comment Web crawler is the comment data of the store. The example is shown in the figure below. 1.2 web page analysis First log in, search for bubble water by keyword, and click a store at will to view all the evaluation interfaces, as shown in the figure below. First ...

PYTHON crawler diary 02 - Data Visualization Record your learning reptile diary 1. Environmental preparation linux environment python3 6 + (there are many online tutorials here, so choose one that is more effective Installing Python 3 on Linux)) linux nginx environment (choose your favorite version) https://nginx.org/download/ ) linux guni ...

Before forecasting the time series, we need to carry out a series of tests on the data, mainly to test the stability and randomness of the data (white noise test). This paper mainly introduces ADF test and Ljung box test ADF test ADF test, i.e. unit root test, refers to whether there is a unit root in the test series, because the existence ...

1. Introduction to datasets: UCF101 is a motion recognition dataset for real action videos collected on YouTube and provides 13320 videos from 101 action categories. Official website: https://www.crcv.ucf.edu/research/data-sets/ucf101/ Dataset name: UCF-101 (2012)Total Videos: 13,320 VideosTotal duration: 27 hoursVideo source: YouTube col ...

1. Reptile target It is generally believed that Python crawlers are powerful, but Python has some difficulties in solving dynamic loading or landing websites. Compared with some ordinary crawlers, using R language will be more convenient. with https://www.thepaper.cn/ For example, the httr package commonly used in dynamic web pages is mainly ...

pandas advanced operations import pandas as pd import numpy as np from pandas import DataFrame Replace operation The replacement operation can act synchronously in Series and DataFrame Single valued substitution Normal replacement: replace all qualified elements: to_replace=15,value=‘e’Specify single value substitution ...

Population analysis cases Requirements: Import the file and view the original dataSummarize population data and state abbreviation dataDelete the duplicate abstraction column in the summarized dataView the columns with missing data in the summarized dataFind out which states / regions make the value of state NaN in the summarized data, ...

Time series analysis ARIMA Stationarity: stationarity requires that the fitting curve obtained through the sample time series can continue along the existing form "inertia" in the future Stationarity requires that the mean and variance of the series do not change significantly Strict and weak stability: Yan pingwen: the distr ...