Continue with the previous Reading Notes, talk nonsense, and go straight to the topic.
This article focuses on the infile statement.
11: infile statement
DSDIt is required that a dataset can contain delimiters, but must be enclosed in quotation marks. The number between two consecutive delimiters is treated as missing values,The default Delimiter is comma.
Firstobs =Read from this record row
Obs =Number of records to be read
Length = virableAssign the Data
mining algorithms, data modeling, and so on, as long as it is more than m of data, R is very difficult to do, But Python is basically competent.
Add:
Python has a dedicated data analysis package Pandas for SQL-like functions. However, Pandas loads all data into the memory.
seconds, it takes several hours for R to run, and 8 GB of memory is fully occupied ).
In general, Python is a balanced language, which can be used in all aspects, while R is prominent in statistics. However, data analysis is not just about statistics, data collection, data processing, data sampling,
, clustering analysis, in addition to decision trees (commonly used classification methods are cart2) Calculation of predictive analysis methods such as regression, time series, neural networks, etc.3) Sequence rule analysis methods, such as association rules, sequence rules, etc.4, the main data mining softwareCurrently on the market more commonly used data
), classification algorithm (C4.5, KNN, Logistic Regression, SVM, etc.), clustering algorithm (Kmeans, spectral Clustering). The target can first thoroughly understand the usage and advantages and disadvantages of the data mining 10 algorithms.
Compared to SAS, SPSS, R language is more suitable for researchers the R Project for statistical Computing, because R
Python data analysis, R language and Data Mining | learning materials sharing 05, python Data Mining
Python Data Analysis
Why python for data analysis?
In terms of
advantage over old products. The following are some current data mining products:
IBM: 'Intelligent miner' 'smart miner'
Tandem: 'relational data miner' relational data miner'
Angosssoftware: 'knowledgeseeder' knowledge searcher'
Thinking Machines Corporation: 'darwintm'
Neovista software: 'asic'
Isl demo-systems, Inc
, the monthly variables accounted for the sum of the variables. With these cleaning and transformation work, we generate a dataset for modeling. (iv) Establishment of models. We choose the SAS EM Package as the modeling tool and choose the decision tree algorithm in the mining algorithm. The decision tree algorithm can handle hundreds of fields, has exploratory function and is highly automated. Considering
validating the data mined8) Interpretation and use of dataData mining analysis method is to use the data to establish some models to imitate the real world, using these models to describe the patterns and relationships in the data, commonly used data
patterns using intelligent methods6. Pattern Evaluation: Identify the truly interesting patterns that provide knowledge based on a certain degree of interest measurement7. Knowledge Representation: Use of visualization and knowledge representation techniques to provide users with knowledge of miningProcess diagram of data miningExcellent Data Mining software too
sample data for mining modeling. in order to facilitate the reader's understanding of the case, this book provides the actual raw sample data files and data exploration, data preprocessing, model building and evaluation of the various stages of MATLAB code program, readers
method, generally divided into two stages of training and classification.2. Text clustering, is a typical unsupervised machine learning method, the choice of clustering method depends on the data type. 3. Information extraction.4. Summary.5. Compress.Among them, text classification and clustering are the two most important and major mining functions.Mining Tools: 1.IBM DB2 Intelligent Miner. 2.
components in WEKA.
Knime
Knime (Konstanz informationminer, http://www.knime.org) is a well-developed data mining tool based on Eclipse development environment. No installation is required and it is easy to use (idmer: Haha, everyone's favorite green version ). Like Yale, knime is developed in Java and can be extended using the mining algorithm in WEKA. What's
where the hot research is.The field of data mining mainly includes the following aspects: Basic theory Research (rule and pattern Mining, classification, clustering, topic learning, temporal spatial data mining, machine learning methods, supervision, unsupervised, semi-supe
and return of goods)
19. Target marketing)
I. Example: "customer" and "housing"
Ii. Input: Geographic Information System, Financial System
Iii. Target: response to a request
Iv. Operation: target a customer segment that can respond quickly in the future competition
20. CRM
A) Example: existing customers
B) input: purchase history, goods/service usage records, and statistical data
C) Objective: Adjust the brand, cancel, and discover shortcomings
D) op
features for specific applications Tao rather than producing a sampling set that can be applied to a variety of applications4 ways to dig SAS datasas/en enables data marts and Tao with data warehousing and business intelligence reporting tools. It has data sampling tools, data
incorporate background knowledge into data mining. How to relate the results of the excavation to the real-world decisions it affects-what the digger can do is turn the results back to the user. Discover topics of interest to users. 5. Data Mining in a network Setting (net mining
will not agree, because no matter the original database (IBM, Sybase, NCR, Oracle, Microsoft, etc ), the statistical analysis software (SAS, statistica, SPSS, etc), and even the reporting tools (Bo, Brio, Cognos, etc) are desperately extending their own value chains.
Therefore, simply call Data Management (DM) to make sure that all data is in the world.As for
hundreds of models per year, data and model Management is very complex, data mining is expected to benefit very much, users have a good theoretical foundation and application level, you should choose powerful, flexible and efficient mining tools; otherwise, you should consider those features relatively simple, suite-s
to the enterprise. Some people say that data mining is only "disappointing", it looks marvellous, but nothing useful. This is a misunderstanding, admittedly, in some data mining projects, or because of a lack of clear business goals, or because of inadequate data quality, o
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