python saves content to files (text, json, csv)
python saves content to files (text, json, csv) In the daily life of developers, saving data to a file is one of the most common programming tasks. Usually, a program needs some input and produces some output. In many cases, we want to persist these results. We may find ourselves saving data toUTF-8...
Posted by frans-jan on Fri, 14 May 2021 06:19:35 +0930
Using sklearn to realize SVM and data preprocessing
1. SVM algorithm Support vector machine (SVM) is a kind of generalized linear classifier which classifies data in the way of supervised learning. Its decision boundary is the maximum margin hyperplane of learning samples. SVM uses hinge loss function to calculate empirical risk, and adds regulaUTF-8...
Posted by Amitk on Sun, 23 May 2021 03:19:16 +0930
Introduction to anomaly detection series (5. Anomaly detection of high dimensional data)
Introduction to anomaly detection series (5. Anomaly detection of high dimensional data) preface in real scenarios, many data sets are multi-dimensional. With the increase of dimensions, the size (volume) of the data space will grow exponentially, making the data become sparse, which is the proUTF-8...
Posted by anto on Mon, 24 May 2021 04:14:26 +0930
python crawlers crawl fund information from Tiantian fund to calculate net position value
1. Getting Web Pages 1. Open a fund web page First we open Tiantian Fund Network, then we open a fund page at random.For example, 161725 China Merchants Certificate Liquor Index. Links: http://fund.eastmoney.com/161725.html. We found that the web address of Tiantian Fund consists of http://funUTF-8...
Posted by Ravenous on Sat, 29 May 2021 08:24:04 +0930
Aviation big data -- prediction of aircraft coordinates (flight trajectory) by ADS-B message system
This chapter mainly introduces how to make a data set suitable for neural network input / output, and how to restore the dimension of the output data. The next chapter updates the construction of neural network. catalogue introduction Input / output data set making theoretical support 1. DescriUTF-8...
Posted by mindrage00 on Fri, 11 Jun 2021 09:14:35 +0930
Is there anyone who doesn't understand the missing value processing of xgboost?
In conclusion, XGBoost and LightGBM support missing values Since XGBoost and LightGBM treat missing values in the same way, we only use XGBoost to interpret them I suggest you take a look at the paper, link: https://www.kdd.org/kdd2016/subtopic/view/xgboost-a-scalable-tree-boosting-system XGBooUTF-8...
Posted by DaveLinger on Mon, 21 Jun 2021 05:45:48 +0930
[entry 11] procedural SQL and openGauss stored procedures, functions and triggers
1, Procedural SQL Basic SQL is a highly nonprocedural language. Embedded SQL embeds SQL statements into programming language, and realizes process with the control function of high-level language. Procedural SQL is an extension of SQL, which adds the function of procedural statement. In short, UTF-8...
Posted by mehaj on Sat, 03 Jul 2021 05:34:07 +0930
An abnormal trend analysis of indicators in N-day window based on batch processing [big data application of Internet of things]
catalogue 0 problem background 1 algorithm analysis 2 problem description 3 data preparation 4. Problem analysis 5 Summary 0 problem background In the management of equipment health monitoring, we often need to monitor the circuit parameters of the equipment in order to reflect the operation stUTF-8...
Posted by Boris Senker on Fri, 09 Jul 2021 03:05:02 +0930
Polynomial regression, local regression, kernel smoothing and smoothing spline regression models in R language
Original link: http://tecdat.cn/?p=20531Original source: Tuo end data tribal official account===In the standard linear model, we assume . When the linear assumption cannot be satisfied, other methods can be considered.polynomial regression The extension may assume some polynomial functions,SimiUTF-8...
Posted by Cochise on Tue, 07 Dec 2021 19:02:23 +1030
Pandas Basic Operations
Pandas Basic Operations Series 1 Series Creation # Import import pandas as pd pd.Series(data=None, index=None, dtype=None) Parameters: Data: Incoming data, can be ndarray, list, etc.Index: Index, must be unique and have the same length of data. If no index parameter is passed in, an integer indUTF-8...
Posted by hemoglobina on Fri, 10 Dec 2021 04:01:47 +1030