statistical software for data analysis

Only when performing statistical analysis can you feel the strength of the database and the fun of digital games. Of course, for enterprises, it is one of the best support for decision analysis. the use of SQL in a recently completed project has deepened my understanding and use of SQL. I am very happy to share with you the fun of it.To put it bluntly, let's crea

. Logical regression When the reaction variable is a classification variable, the structural model needs to use logical regression.1. Correlation test of classification variables The correlation between the classification variables can be generally used by the table analysis or the card-side test method. 1. The tabular table is a cross-frequency table formed between the classification levels of two categories of variables, comparing the actual frequen

+ bIn [18]: cOut[18]: 0 1 2 3 4a 5.0 7.0 9.0 11.0 NaNb 19.0 21.0 23.0 25.0 NaNc 8.0 10.0 12.0 14.0 NaNd NaN NaN NaN NaN NaNIn [19]: c.sort_values(2,ascending=False)Out[19]: 0 1 2 3 4b 19.0 21.0 23.0 25.0 NaNc 8.0 10.0 12.0 14.0 NaNa 5.0 7.0 9.0 11.0 NaNd NaN NaN NaN NaN NaNIn [20]: c.sort_values(2,ascending=True)Out[20]: 0 1 2 3 4a 5.0 7.0 9.0 11.0 NaNc 8.0 10.0 12.0 14.0 NaNb

Summary: Using the historical defect data in the software to establish the classifier, the software flaw detection. Multi-core learning (multiple kernel learning): Map historical defect data to high-dimensional feature space, so that the data can be better expressed;

most software managers have good technical and analytical skills, they often do not have the time to explore the details, and they need a visual way to understand the discoveries represented by the numbers. Statistics and spreadsheet tools produce charts that are a good start, but more research is needed to actually deliver the output of software analysis to dec

Software static analysis and tool Klocwork Introduction 1. Software static analysis Software static analysis does not need to execute program code, can discover the code quality and the security question, this technique can move t

As with anything, software has its own process of gestation, birth, growth, maturation and decay, which is generally referred to as the "software life cycle". The software lifecycle is generally divided into 6 phases, namely planning, requirements analysis, design, coding, testing, operation and maintenance. The relati

Test case design is one of the basic skills that testers must master, and it is also one of the difficulties. So how does a written test case evaluate effectiveness? Recently has been thinking about this issue, originally wanted to come to an article, but has been lazy, until now, the information on the Internet a lot, here on the combination of their own thinking to simply talk about their own views it. 1, from the test case form analysis First, each

in high throughput data format. . fta:idenfta format. . txt: tab-delimited format, text file. 2. Wireless network test post-processing software The main functions include the following aspects. (1) Provides a flexible Report wizard, which is independent of background data analysis and can be executed separately;

information. The software requirement analysis should provide as much information as possible for the software to achieve functional requirements, so that software designers and Software testers do not need to contact the demand side. This requires that the

, and host class. In P2P technology, UPnP is often used to implement direct TCP transfer, but different devices have small differences, and the methods supported by different devices are not the same, in the process of software startup, in order to save system overhead and synchronization, the Timer class is used to realize the addressing and interaction of UPnP. Experienced software developers know that

-functional requirements, software reverse requirements, software design and implementation limitations, reading support information.The software requirement analysis should provide all the information that the software realizes the function requirement, so that the

, so the test cases are written based primarily on software requirements. In addition, should also comply with the relevant writing rules, norms and so on. 1.2 Test Case Development principles The design principles for test cases include: 1) According to the principle: the main basis of the test case preparation is the requirement specification and relevant technical specification document provided by the project; 2) The principle of full coverage: th

The technology of rogue software is varied. Any function may become a rogue technology, just like a weapon. If it is used, justice can be done. If it is used properly, it can be used as an accomplice to evil. First, I started with some rogue Analysis in win32: 1. As a rogue software, the first thing I want to do is to run it in real time. For example, in the regi