udacity data mining

you can also use regular expression matching, Which is omitted here. Next is the region, which is located in the "coordinate" attribute. It is not convenient to use regular expression matching. Therefore, we use the series partitioning method, that is, to split this attribute by characters and extract items with fixed positions. Through observation, you can use symbols to separate them, which is exactly the same as 4th items. Similarly, you can extract the name of a residential area. The only

Spatial Data Mining refers to the process of extracting hidden knowledge and spatial relationships from spatial databases and discovering useful Theories, Methods, and technologies of features and patterns. The process of spatial data mining and knowledge discovery can be roughly divided into the following steps:Data p

]} = \frac{|x_{if}-x_{jf}|} {\max_{h} x_{hf}-\min_{h} X_{HF} $, where h passes all non-missing objects of property F. F is nominal or two yuan: if \ (x_{if} = x{jf}\), then \ (d_{ij}^{[f]}=0\), otherwise take 1. F is ordinal: computes the rank \ (r_{if}\) and \ (z_{if} = \frac{r_{if}-1}{m_f-1}\)and then processes it as a numeric attribute. Cosine similarityTo compare documents, each document is represented by a so-called word frequency vector, usually very long and sparse, and the t

Data Warehouse and data mining--a sharp weapon to participate in the competition of digital telecommunication enterprises The solution of Guangdong Telecom Data Warehouse based on Sybase Guangdong Institute of Telecommunication Science and technology 1 overview With the opening of the telecom market, the competition

With the advent of the cloud era and the introduction of SAAS concepts, more and more enterprises are choosing to provide SaaS application services through Internet platforms such as SaaS application providers and carriers, the data volume of SAAS applications is growing at the TB level. Different SaaS application systems provide different data structures, including text, graphics, and even small databases;

Web-Oriented Data Mining There is a massive amount of data information on the Web, and how to make complex applications of this data has become a hot research topic in today's database technology. Data mining is to discover hidden

) barplot (table (data))2.3Data $, the, -, the, the, -) Median2sum=0 for(Iinch 1: Length (data)) {Sum=sum+Data[i]if(sum1]>median) Break} #出循环后i+1 is the subscript of the median interval, i.e. 20~ - -+ (sum (data)/2+sum)/data[i+1])* -2.4Age at, at, -, -, the, A, -, the, -, th

What is http://www.quora.com/What-is-data-science data science?Http://www.quora.com/How-do-I-become-a-data-scientist how can I become a data scientist?Http://www.quora.com/Data-Science/How-does-data-science-differ-from-traditional

R R (http://www.r-project.org) is used for statistical analysis and graphical computer language and analysis tools, in order to ensure performance, its core computing module is written in C, C ++ and FORTRAN. It also provides a scripting language (R) for ease of use. The r language is similar to the s language developed by Bell Labs. R supports a series of analysis technologies, including statistical testing, predictive modeling, and data visualizatio