untangling text data mining marti hearst

... định tên của worksheet mà bạn chọn vào Nhấp vào nút ( ) để chọn từ danh sách các worksheet sẵn Data range: Bạn có thể nhập dữ liệu bắt đầu với các hàng không trống đầu tiên hoặc với một phạm ... thực hiện, hoặc bạn có thể đặt tên lại cho lệnh này “phan cum” hay tùy ý bạn Use partitioned data: Sử dụng dữ liệu phân vùng Nếu trước đó dữ liệu của bạn đã thực hiện lệnh Partition Number

Ngày tải lên: 17/02/2013, 16:08

... small dataset, need all observations to estimate parameters of interest • Data mining – loads of data, can afford “holdout sample” • Variation: n-fold cross validation – Randomly divide data ... Trang 1Data Mining TutorialD A Dickey Trang 2April 2012Trang 3Data Mining - What is it?Trang 4• A “divisive” method (splits) • Start ... clusters for “macaroni” data. Trang 61 Grades vs IQ and Study TimeData tests; input IQ Study_Time Grade; IQ_S = IQ*Study_Time ; Proc reg data=tests; model Grade = IQ; Proc reg data=tests; model

Ngày tải lên: 04/03/2013, 14:32

... of the data representation in state space Translating the information discovered there into insights about the data, and the objects the data represents, forms an important part of the data survey ... normalization methods have anything in common with putting data into the multitable structures called “normal form” in a database, data warehouse, or other data repository.) During the process of manipulation, ... prepared for surveying and mining Trang 14Chapter 7: Normalizing and Redistributing VariablesOverview From this point on in preparing the data, all of the variables in a data set have a numerical

Ngày tải lên: 08/11/2013, 02:15

... to the information content of the data set Yet it still leaves some information exposed for the mining tools to use when values outside those within the sample data set are encountered Trang 37.2 ... For instance, one such tool for a particular data set could, when fine-tuned and adjusted, do just as well with unprepared data as with prepared data The difference was that it took over three ... of the data survey However, it is during the data preparation process that they are first “discovered.” 7.2.4 Modified Distributions When the distributions are adjusted, what changes? The data

Ngày tải lên: 08/11/2013, 02:15

... statistical data learning and mining techniques tothe multimedia domain are also provided in this chapter.Data mining is defined as discovering hidden information in a data set.Like data mining in ... searching the data The model in data mining can be either predictive or descriptive in nature Apredictive model makes a prediction about values of data using known resultsfound from different data sources ... literature to perform specific multimedia data mining tasks as exemplifiedin the subsequent chapters of the book Specifically, in the multimedia datamining context, the classification and regression

Ngày tải lên: 10/12/2013, 09:15

... Introduction to Data Mining 11.1 Introduction 11.2 Knowledge Discovery and Data Mining 51.3 Data Compression 101.4 Information Retrieval 121.5 Text Mining 141.6 Web Mining 151.7 Image Mining 161.8 ... huge datasets being more feasible in the compresseddomain, we also devote a reasonable portion of the text to data mining in thecompressed domain Topics like text mining, image mining, and Web miningare ... Algorithms in Data Mining 702.5.1 Regression 712.5.2 Association rules 712.6 Role of Rough Sets in Data Mining 722.7 Role of Wavelets in Data Mining 732.8 Role of Hybridizations in Data Mining 742.9

Ngày tải lên: 13/12/2013, 01:15

... Describing Series Data Series data differs from the forms of data so far discussed mainly in the way in which the data enfolds the information The main difference is that the ordering of the data carries ... main reason that series data has to be prepared differently from nonseries data There is a large difference between preparing data for modeling and actually modeling the data This book focuses ... a series data set so that it can be accurately and completely characterized 2 Find methods for manipulating the unique features of series data to expose the information content to mining tools

Ngày tải lên: 15/12/2013, 13:15

... drawback is that the contribution of each data point is equal to that of all the other data points in the weighting period It may be that the more distant past data values are less relevant than more ... some specific number of contiguous data points It corresponds to the lag distance mentioned before The only difference between a window and a lag is that the data in a window is manipulated in ... in some way, say, changed in order A lag implies that the data is not manipulated As the window moves through the series, the oldest data point is discarded, and a new one is Trang 10added When

Ngày tải lên: 15/12/2013, 13:15

... needed function in the training data set, the function improves its fit with the test data too When the function learned in the training data begins to fit the test data less well, training is halted ... typically refer to these as data reduction methods.) Principal components analysis is a technique used for concentrating variability in a data set Each of the dimensions in a data set possesses a variability ... Using MDS to collapse a large data set can be highly computationally intensive In Chapter 6, MDS was used in the numeration of alpha labels When using MDS to reduce data set dimensionality, instead

Ngày tải lên: 15/12/2013, 13:15

... far as data preparation for data mining is concerned, the journey ends here. However, the data is still unmined. The ultimate purpose of preparing data is to gain understanding of what the data ... introduced. Such data has a perspective. When mining perspectival data sets, it is very important to use nonperspectival test and evaluation sets. With the best of intentions, the mining data has been ... do with data mining? The whole purpose of the data survey is to help the miner draw a high-level map of the territory. With this map, a data miner discovers the general shape of the data, as

Ngày tải lên: 15/12/2013, 13:15

... miner has sufficient data Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark 11.4.1 Confidence and Sufficient Data A data set may be inadequate for mining purposes simply ... properly part of the data survey The survey only looks at and measures the data set presented While it provides information about the data set, it does not manipulate the data in any way, exactly ... area in one data set pointing to a more densely populated area in the other data set The survey makes a comprehensive map of state space density—both of the input data set and the output data set

Ngày tải lên: 15/12/2013, 13:15

... relationships from this data that are then to be applied to other similar data Whatever can be discovered in this data is sufficient, since it works in this data set, and there is no other data set to apply ... can determine if a suitable model can be built from the data on hand The CREDIT Data Set The CREDIT data set represents a real-world data set, somewhat cleaned (it was assembled from several ... for the CREDIT data set predicting BUYER This curve indicated that the data set is likely to be very difficult to learn If this data set were the whole population, as with the CARS data set, there

Ngày tải lên: 15/12/2013, 13:15

... structure. Looking at data of this sort in text form is called text mining. Much work is being done to prepare and mine such data, and there are already embryonic text mining tools available. ... Preparation of text in general is well beyond the near future, but mining of one particular type of text, and preparation of that type of text for mining, is close. This is the type of text that can ... and an 85.8283% accuracy in the test data for the prepared data set (bottom). 12.4 Practical Use of Data Preparation and Prepared Data How does a miner use data preparation in practice? There

Ngày tải lên: 15/12/2013, 13:15

... outline of the text Research objectives Methodology and Instruments Factorial Findings Managerial Implications Conclusion Discussion 18/01/2006 Ulrich Ofele Trang 31, Authors of the text ... at the University of Glasgow, Glasgow, UK 18/01/2006 Ulrich Ofele Trang 41 Outline of the text LI Aim of the paper: m development and validation of a scale for the measurement of

Ngày tải lên: 22/12/2013, 02:17

... between OLAP and Data Mining Mining Aggregated Data OLAP Pattern Discovery Needs OLAP Mining versus Relational Mining Building OLAP Mining Models Using Wizards and Editors Using the Data Mining Wizard ... Services Execute DDL Task Data Mining Transformations Data Mining Model Training Destination Data Mining Query Transformation Example Data Flows Using Non-Predictive Data Mining Queries in an Integration ... Microsoft Data Mining General Data Mining 581 581 582 583 584 584 585 586 586 586 Appendix A: Data Sets MovieClick Data Set Voting Records Data Set Wine Sales Foodmart College Plans Data Set 589

Ngày tải lên: 22/01/2014, 22:20

... requirements, and how to create data mining models by using the Analysis Manager Trang 8# Introducing Data Mining ! Defining Data Mining ! Data Mining Applications ! Data Mining Models ! Introductory ... Introducing Data Mining ! Training a Data Mining Model ! Building a Data Mining Model with OLAP Data This module provides you with an introduction to Microsoft® SQL Server™ 2000 Analysis Services Data Mining ... various data mining techniques that are available ! Training a Data Mining Model Describe the process required to create a data mining model Define training data and cases ! Building a Data Mining

Ngày tải lên: 24/01/2014, 19:20

... 10/04/2008 1:59am Page 5 Business Problems for Data Mining 5 Anomaly detection — How do you know whether your data is ‘‘good’’ or not? Data mining can analyze your data and pick out those items that don’t ... online transaction processing (OLTP) databases and more than 70 data warehouses. The first step is to pull the relevant data into a database or a data mart where the data analysis is applied. For example, ... purchase demographic data to build models that meet your business requirements. Data Cleaning and Transformation Data cleaning and transformation are the most resource-consuming steps in a data mining project.

Ngày tải lên: 27/01/2014, 09:20

... quan trong trong qui trình KDD Knowledge 1 2 3 4 5 Data cleaning Data warehouse Task relevant data Data mining Pattern Evaluation selection Data integration Định nghĩa Kho Dữ Liệu (tt) • Theo ... Dữ liệu tổng hợp 65/12/2009 Biến thời gian 9 • Data • Time • 01/97 • 02/97 • 03/97 • Data for January • Data for February • Data for March • Data • Warehouse 5/12/2009 Ổn Định • Là lưu trữ ... ra quyết định có tính lãnh đạo của tổ chức, với các dữ liệu có mức độ phức tạp và quan trọng Data mining: khám phá, tìm kiếm dữ liệu cho các kiến thức mới không dự biết trước Một số thuật toán...

Ngày tải lên: 18/01/2013, 16:15

... trộn dữ liệu (merge data) từ nhiều nguồn khác nhau vào một kho dữ liệu  Biến đổi dữ liệu (data transformation): chuẩn hoá dữ liệu (data normalization)  Thu giảm dữ liệu (data reduction): thu ... liệu  Làm sạch dữ liệu (data cleaning/cleansing): loại bỏ nhiễu (remove noise), hiệu chỉnh những phần dữ liệu không nhất quán (correct data inconsistencies)  Tích hợp dữ liệu (data integration): ... tiền xử lý dữ liệu  Quá trình xử lý dữ liệu thô/gốc (raw/original data) nhằm cải thiện chất lượng dữ liệu (quality of the data) và do đó, cải thiện chất lượng của kết quả khai phá.  Dữ liệu...

Ngày tải lên: 23/01/2013, 22:17

... computes wi from data to minimize squared error to ‘fit’ the data  Not flexible enough 8 © 2006 KDnuggets Related Fields Statistics Machine Learning Databases Visualization Data Mining and Knowledge ... training data is not a good indicator of performance on future data  The new data will probably not be exactly the same as the training data!  Overfitting – fitting the training data too ... useless © 2006 KDnuggets Data Mining Tutorial Gregory Piatetsky-Shapiro KDnuggets 16 © 2006 KDnuggets Clustering Find “natural” grouping of instances given un-labeled data © 2006 KDnuggets Evaluation 27 ©...

Ngày tải lên: 04/03/2013, 14:32