C# Json string to DataTable, DataSet JsonConvert.DeserializeObject loss of precision problem Problem description When I was converting Json string to DataTable, I found that if I have a column of decimals, but the first row is an integer, all decimal digits below will be lost. Example public const string _InvoiceDataJsonTable = “[{“EXCHANGE_USD”:24},{“EXCHANGE_USD”:15},{“EXCHANGE_USD”: 191.06}]”; DataTable dtTable […]
Tag: precision
Performance evaluation indicators (precision, recall, ROC, AUC)
Empirical error, overfitting, underfitting Empirical error, overfitting, and underfitting are common concepts in machine learning, and they are related to the performance and generalization ability of the model. Empirical Error refers to the error or loss on the training data. It is derived by applying the model to the training data and calculating the difference […]
Java: Use the BigDecimal class to cleverly handle the precision loss of the Double type
Key points of this article Briefly describe the reasons why precision is lost when converting floating point from decimal to binary. Introduce the differences between several ways to create BigDecimal. A collection of tools for high-precision calculations. I learned the provisions of Alibaba Java Development Manual on BigDecimal equality. Classic problem: loss of precision of […]
How to perform large number operations and high-precision calculations?
Large number operations and high-precision calculations are common requirements in computer programming, especially when dealing with large integers, fractions, complex numbers, floating point numbers, etc. that require more digits. In C language, due to limited native data types, you need to use custom data structures and algorithms to perform large number operations and high-precision calculations. […]
Python batch downloads Sentinel-1 precision orbit files (.EOF)
Based on Xiaolong’s hard work on RS, we added the reading time of SLC images (readSLCFileName, which saves the operation of counting the timing of downloading sentinel images), detecting the downloaded track file size and re-downloading the wrong file (getFileSize and downloadWrongOribits) content For specific operation methods, see: https://blog.csdn.net/qq_44932630/article/details/124202144、 FBI WARNING: In this example, you […]
verilog implements IEEE754 half-precision floating point number addition and subtraction operations
1. IEEE754 protocol half-precision floating point number format and conversion Format: The binary half-precision floating point number has a total of 16 bits, and the index is 0-15. The 15th bit is the sign bit, 0 represents positive and 1 represents negative, 14-10 bits are the exponent code, and 9-0 bits are the mantissa bit. […]
Linux kernel programming 1–Using low-precision timers
Reference link 1 Reference link 2 Using timers, we can set a specific event to trigger at a certain time in the future. The so-called low-precision timer refers to the timing unit of this timer based on the count of jiffies value. That is to say, its accuracy is only 1/HZ. If the HZ configured […]
Peter Algorithm Small Classroom-High-Precision Algorithm
What is high precision algorithm? When we are doing calculations, we are very likely to encounter questions like this where hundreds of digits are multiplied by hundreds of digits (The person who asked this question is really stupid). At this time, long long will not work, so we have to There is the legendary “high-precision […]
Multi-channel high-precision integrated circuit parameter testing
Article directory Preface 1. Four-channel parameter measurement unit 2. Functional block diagram 3. Specific design 1. Part of the code of the host computer 2.MCU part code 3. Specific tests 4. Summary Foreword In this design, AD5522 is used for parameter measurement. The measurement is completed by controlling the internal register of the chip through […]
Decimal precision loss problem in js
1. Why is there a problem of loss of calculation accuracy? The problem of decimal point precision loss in JavaScript is due to the way it uses floating point number representation. JavaScript uses double-precision floating-point number representation, also known as the IEEE 754 standard, which uses 64 bits to represent a number, of which 52 […]