statistics

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Statistical method for grading a set of exponential data

I have a PHP application that allows the user to specify a list of countries and a list of products. It tells them which retailer is the closest match. It does this using a formula similar to this:[详细]

2023-04-07 04:08 分类：问答
What's the best way of implementing a 'popular content' display?

How do I show a list of \'most popular (articles|posts|whatever) for a period such as the past day? (Essentially replicate the functionality of the Radioactivity Drupal mod开发者_开发知识库ule.)Here\'[详细]

2023-04-07 03:06 分类：问答
k-means: Same clusters for every execution

Is it possible to get same kmeans clusters for every execution for a particular data set. Just like for a ran开发者_运维问答dom value we can use a fixed seed. Is it possible to stop randomness for clu[详细]

2023-04-06 23:12 分类：问答
Determining the values of beta in a logistic regression equation

I read about logistic regression on Wikipedia and it talks of t开发者_运维百科he equation where z, the output depends on the values of beta1, beta2, beta3, and so on which are termed as regression coe[详细]

2023-04-06 22:36 分类：问答
The setting 'auto create statistics' causes wildcard TEXT field searches to hang

I have an interesting issue happening in Microsoft SQL when searching a TEXT field.I have a table with two fields, Id (int) and Memo (text), populated with hundreds of thousands of rows of data.Now, i[详细]

2023-04-06 19:10 分类：问答
SQL why is SELECT COUNT(*) , MIN(col), MAX(col) faster then SELECT MIN(col), MAX(col)

We\'re seeing a huge difference between these queries. The slow query SELECT MIN(col) AS Firstdate, MAX(col) AS Lastdate[详细]

2023-04-06 15:06 分类：问答
Multilinear Regression using OLS in Python not working with my own data [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Python Multiple Linear Regression using OLS code with specific data?[详细]

2023-04-05 22:02 分类：问答
Precision, why do Matlab and Python numpy give so different outputs?

I know about basic data types and that float types (float,double) can not hold some numbers exactly. In porting some code from Matlab to Python (Numpy) I however found some significant differences in[详细]

2023-04-05 21:26 分类：问答
Android Market Developer Console Statistics

I would like to get some stats开发者_JAVA技巧 programmatically about my app; for example: total downloads, active installs...[详细]

2023-04-05 17:10 分类：问答
Creating a separate table for statistical counter in mysql?

I have a table for posts as ID,开发者_如何学Python Title, Content, etc. I just added a column as counter. It is a simple counter of visits, as every time it will be updated as $i+1. In this method, I[详细]

2023-04-05 13:57 分类：问答