Tag：sequence
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Time：2021-10-22
origin Recently read < < my first algorithm book > > ([Japan] Ishida Baohui; Miyazaki Xiuyi)This series of notes is intended to use golang exercises Merge sort The merge sort algorithm divides the sequence into two subsequences with the same length, When it is impossible to further divide (that is, there is only one data […]
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Time：2021-10-21
Most industry applications, especially the Internet industry, generate a large amount of data every day. In the game, a large number of player log information will be generated all the time; In the tourism application, there are real-time prices of various hotels and vehicles every day; Retail e-commerce involving supply chain and daily sales volume […]
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Time：2021-10-21
Original link:http://tecdat.cn/?p=20678 The prediction of stock price has been widely concerned by investors, governments, enterprises and scholars. However, the nonlinearity and non stationarity of data make the development of prediction model a complex and challenging task. In this article, I will explain how to GARCH，EGARCHand GJR-GARCH Model andMonte-Carlo Combined with simulation, To establish an […]
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Time：2021-10-19
origin Recently read < < my first algorithm book > > ([Japan] Ishida Baohui; Miyazaki Xiuyi)This series of notes is intended to use golang exercises Quick sort The quick sort algorithm will first randomly select a reference value (pivot) in the sequence, Then the number other than the reference value, It is divided into two […]
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Time：2021-10-18
Original link:http://tecdat.cn/?p=22511 The standard ARIMA (moving average autoregressive model) model allows prediction only based on the past values of prediction variables. The model assumes that the future value of a variable depends linearly on its past value and the value of past (random) influence. Arimax model is an extended version of ARIMA model. It also […]
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Time：2021-10-16
catalogue summary Make up 2526 Meaning: deduction: code: Minimum product Meaning: deduction: code: rain Meaning: deduction: code: First find F1 Find FN, go backwards Complete code Dyeing: Meaning: deduction: code: summary This test is a thinking question. I only made the rain. My thinking is not agile enough. I have to practice Question 1: 0 […]
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Time：2021-10-15
Original link:http://tecdat.cn/?p=22521 ============================================================== Under the trend of big data, we often need to make predictive analysis to help us make decisions. One of the important things is to predict the future based on our past and present data. This method is often called prediction. Forecasting is needed in many cases: deciding whether to build another […]
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Time：2021-10-12
[No.1 variable value after operation] Problem solving ideasCheck in question. Code display class Solution { public int finalValueAfterOperations(String[] operations) { int v = 0; for (String op : operations) { if (op.contains(“++”)) { v++; } else { v–; } } return v; }} [No.2 sum of array values] Problem solving ideasThe beauty value of the […]
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Time：2021-10-11
Original link:http://tecdat.cn/?p=5919 In this paper, I will introduce how ARMA, ARIMA (box Jenkins), SARIMA and arimax models are used to predict time series data. useLag operatorCalculate lag difference We can usebackshiftLag operatorTo perform calculations. For example, the lag operator can be used to calculate the lag of the time series valueDifference, Where k represents […]
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Time：2021-10-10
Author | Saurabh jajuCompile FlinSource | analyticsvidhya introduce Time series prediction and modeling play an important role in data analysis. Time series analysis is a branch of statistics, which is widely used in econometrics, operations research and other fields. This skill test article is to test your understanding of the concept of time series. A […]
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Time：2021-10-8
LIS review This question is an advanced version of LIS. In class last week, the teacher cited LIS as an example. Before solving this question, post the LIS code here class Solution { public: int lengthOfLIS(vector<int>& nums) { auto n = (int)nums.size(); vector<int> dp(n, 1); for (int i = 0; i < n; ++i) { […]
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Time：2021-10-5
Original link:http://tecdat.cn/?p=22546 Asset prices have volatility over time (variance of daily returns). In some periods, yields are highly variable, while in other periods they are very stable. The stochastic volatility model simulates this situation with a potential volatility variable, which is modeled as a stochastic process. The following model is similar to that described in […]
