categorization

Best way to categorize products in rails 4 app

由 爷，独闯天下 提交于 2019-12-13 08:29:09
问题 So, I'm trying to create a product categorization 'system' in my rails 4 app. Here's what I have so far: class Category < ActiveRecord::Base has_many :products, through: :categorizations has_many :categorizations end class Product < ActiveRecord::Base include ActionView::Helpers has_many :categories, through: :categorizations has_many :categorizations end class Categorization < ActiveRecord::Base belongs_to :category belongs_to :product end Also, what gem should I use? (awesome_nested_set,

Need to set categorized corpus reader in NLTK and Python, corpus texts in one file, one text per line

由 扶醉桌前 提交于 2019-12-10 10:05:21
问题 I am getting familiar with NLTK and text categorization by Jacob Perkins's book "Python Text Processing with NLTK 2.0 Cookbook". My corpus documents/texts each consists of a paragraph of text, so each of them is in a separate line of file, not in a separate file. The number of such these paragraphs/lines are about 2 millions. Therefore there are about 2 million on machine learning instances. Each line in my file (a paragraph of text - a combination of domain title, description, keywords),

Is integration testing an umbrella term and if so, what types of tests does it include?

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-08 17:38:23
问题 I find the concept of 'integration testing' confusing. There seems to be quite a few explanations and scopes: Functional/acceptance testing (e.g. testing the user interface with for example, Selenium) Testing the integration of different classes/modules of software together (simply testing two or more classes together, without them doing anything special like db calls and stuff) Testing the system configuration function/feature-independently (database integration works, dependencies are

Designing a SQL table with hierarchy/sub-categories

由 懵懂的女人 提交于 2019-12-07 06:47:58
问题 I have a table that looks something like this: ID | Keyword | Category | Sub-Category | Sub-Sub-Category | Sub-Sub-Sub-Category Do i need to split it up in two tables (a keyword table and a categories table with parent id) if one keyword can only belong to one category,sub-category...etc. meaning there are no repetition. is there still a need to split it up? 回答1: You only need one table to represent a 1-1 mapping. To represent 1-many or many-many mappings, you should use multiple tables. If a

Designing a SQL table with hierarchy/sub-categories

由 左心房为你撑大大i 提交于 2019-12-05 08:54:26
I have a table that looks something like this: ID | Keyword | Category | Sub-Category | Sub-Sub-Category | Sub-Sub-Sub-Category Do i need to split it up in two tables (a keyword table and a categories table with parent id) if one keyword can only belong to one category,sub-category...etc. meaning there are no repetition. is there still a need to split it up? Mark Elliot You only need one table to represent a 1-1 mapping. To represent 1-many or many-many mappings, you should use multiple tables. If a keyword can only correspond to one category/sub-category/sub-sub-category, your current layout

Domain name classification API

由 孤人 提交于 2019-12-03 08:14:52
I need to categorize domains into different categories that offer the best use of a domain name. Like categorizing 'gamez.com' as a gaming portal. Is there any service that offers classification of domain name like Sedo is doing? All the systems that I am aware of manage a list, somewhat by hand. Using a web-filtering proxies (e.g. WebSense) for inspiration, you could scan for keywords contained in the domain name, or in web content/meta tags at the specified location. However, there are always items that seem to match more than one category, or no category, and these need deeper analysis.

plotting in different shapes using pch= argument

由 淺唱寂寞╮ 提交于 2019-12-03 05:13:40
问题 If I am using R to plot. How can I assign a particular shape to data points belonging to one category (using the pch argument to plot() ) based on a column in my data frame that has the categorical data? Will using as.factor() to group data and then using pch help ? 回答1: You mean something like this...? plot(Sepal.Length ~ Petal.Length, xlab = "Petal Length (cm)", ylab = "Sepal Length (cm)", pch = c(16, 17, 18)[as.numeric(Species)], # different 'pch' types main = "Anderson Iris Dataset", col

plotting in different shapes using pch= argument

由 萝らか妹 提交于 2019-12-02 18:29:59
If I am using R to plot. How can I assign a particular shape to data points belonging to one category (using the pch argument to plot() ) based on a column in my data frame that has the categorical data? Will using as.factor() to group data and then using pch help ? You mean something like this...? plot(Sepal.Length ~ Petal.Length, xlab = "Petal Length (cm)", ylab = "Sepal Length (cm)", pch = c(16, 17, 18)[as.numeric(Species)], # different 'pch' types main = "Anderson Iris Dataset", col = c("red", "green","blue")[as.numeric(Species)], data = iris) Which produces: 来源： https://stackoverflow.com

Categories of tags

由 风流意气都作罢 提交于 2019-11-30 15:45:10
I'm starting a pro bono project that is the web interface to the world's largest collection of lute music and it's a challenging collection from several points of view. The pieces are largely from 1400 to 1600, but they range from the mid-1200's to present day. Needless to say, there is tremendous variability in how the pieces are categorized and who they are attributed to. It is obvious that any sort of rigid, DB-enforced hierarchy isn't going to work with this collection, so my thoughts turn to tags. But not all tags are the same. I'll have tags that represent a person/role (composer,

Categories of tags

由 房东的猫 提交于 2019-11-29 22:55:22
问题 I'm starting a pro bono project that is the web interface to the world's largest collection of lute music and it's a challenging collection from several points of view. The pieces are largely from 1400 to 1600, but they range from the mid-1200's to present day. Needless to say, there is tremendous variability in how the pieces are categorized and who they are attributed to. It is obvious that any sort of rigid, DB-enforced hierarchy isn't going to work with this collection, so my thoughts
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