dummy-data

问题 I'm generating feature vector for random forest classifier of scikit-learn . The feature vector represents the name of 9 protein amino acid residues. There are 20 possible residue names. So, I use 20 dummy variables to represent one residue name, for 9 residue, I have 180 dummy variables. For example, if the 9 residues in the sliding window are: ARNDCQEGH (every one letter represent a name of a protein residue),my feature vector will be: "True\tFalse\tFalse\tFalse\tFalse\tFalse\tFalse\tFalse

问题 What is the quickest way to fill a SQL table with dummy data? I have a wide table with about 40 fields of different kinds (int, bit, varchar, etc.) and need to do some performance testing. I'm using SQL Server 2008. Thank you! 回答1: SQL Data Generator by RedGate Data generation in one click Realistic data based on column and table name Data can be customized if desired Eliminates hours of tedious work Full support for SQL Server 2008 回答2: Recommend the free, GNU-licensed, random custom data

问题 I am looking for for a pythonic way to handle the following problem. The pandas.get_dummies() method is great to create dummies from a categorical column of a dataframe. For example, if the column has values in ['A', 'B'] , get_dummies() creates 2 dummy variables and assigns 0 or 1 accordingly. Now, I need to handle this situation. A single column, let's call it 'label', has values like ['A', 'B', 'C', 'D', 'A*C', 'C*D'] . get_dummies() creates 6 dummies, but I only want 4 of them, so that a

问题 I have a set of basketball lineup data with five columns, each sharing the same factor, like so: head(dat) V1 V2 V3 V4 V5 1 MILES,KEATON KINGSLEY,MOSES BELL,ANTHLON HANNAHS,DUSTY DURHAM,JABRIL 2 MILES,KEATON KINGSLEY,MOSES BELL,ANTHLON HANNAHS,DUSTY DURHAM,JABRIL 3 KINGSLEY,MOSES BELL,ANTHLON HANNAHS,DUSTY DURHAM,JABRIL THOMPSON,TREY 4 KINGSLEY,MOSES BELL,ANTHLON HANNAHS,DUSTY THOMPSON,TREY BEARD,ANTON 5 THOMPSON,TREY BEARD,ANTON KOUASSI,WILLY WHITT,JIMMY WATKINS,MANUALE 6 THOMPSON,TREY BEARD

问题 Can anyone inform whether there is any good framework in c# that will generate dummy objects and lists so that we don't need to generate the stub data manually? 回答1: You can try NBuilder. It's purpose is rapid generation of test objects. If you have Employee class: public class Employee { public string Name { get; set; } public DateTime Birthday { get; set; } } Generating list of 10 Employee object is simple like this: var employees = Builder<Employee>.CreateListOfSize(10).Build(); It will

问题 hey i am using ADS1292 for my own project, and myself is confused with SPI protocol. i found some code on the internet and i found it sends and receive at one time. for example, i want to send 0xFF to slave device. then it sends the data first and wait for a receive. And when receiving data, it sends a dummy byte and then receive. Anyone please explain why they do this? uint8_t sEE_ReadByte(void) { return (sEE_SendByte(sEE_DUMMY_BYTE)); } uint8_t sEE_SendByte(uint8_t byte) { /*!< Loop while

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . Sorry if this is off topic - but it is certainly programming related . I need to test my web application at scale (concurrent users and amount of data in system). For the latter, I need some way of generating dummy data for a variety of types (name, address, email and some other data types) Are there any open

问题 if i need a for loop in python for i in range(1,42): print "spam" but don't use the "i" for anything pylint complains about the unused variable. How should i handle this? I know you can do this: for dummy_index in range(1,42): print "spam" but doing this seems quite strange to me, is there a better way? I'm quite new at python so forgive me if I'm missing something obvious. 回答1: There is no "natural" way to loop n times without a counter variable in Python, and you should not resort to ugly

问题 For a course I am currently in I am trying to build a dummy transaction, customer & product dataset to showcase a machine learning usecase in a webshop environment as well as a financial dashboard; unfortunately, we have not been given dummy data. I figured this'd be a nice way to improve my R knowledge, but am experiencing severe difficulties in realizing it. The idea is that I specify some parameters/rules (arbitrary/fictitious, but applicable for a demonstration of a certain clustering

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: Quickest way to fill SQL Table with Dummy Data I'm looking for a tool that will generate insert statement for an existing database filled with dummy data. This is meant to allow testing of the system. I'm thinking about something that reads the type of each field and generates data accordingly. If the field name is "username" for example, it's best if it actually knows to take common user names. It should