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  • Reordering matrix elements to reflect column and row clustering in naiive python

    - by bgbg
    Hello, I'm looking for a way to perform clustering separately on matrix rows and than on its columns, reorder the data in the matrix to reflect the clustering and putting it all together. The clustering problem is easily solvable, so is the dendrogram creation (for example in this blog or in "Programming collective intelligence"). However, how to reorder the data remains unclear for me. Eventually, I'm looking for a way of creating graphs similar to the one below using naive Python (with any "standard" library such as numpy, matplotlib etc, but without using R or other external tools).

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  • Most commonly occurring string in mysql column.

    - by MILESMIBALERR
    I am making a website where users can vote on which category a page is. They can vote that the page is category, for example: a, b, c, or d. Please don't ask what I am using this for, it is not important, I just want to know how to do it. I need to find the most commonly occurring category in the mysql row out of all the votes. Each time a user submits their vote, it submits the "category" that they voted for, and the "page_id". I have this so far: select page_id, category from categories group by page_id You cannot simply use a "COUNT(*) where category = 'a'" then repeat it for each category because there is many more categories in the actual project.

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  • WPF Datagrid set the column values only when the row is left

    - by Noam
    Hello I have a simple class. When I use it in winforms binding, whenever I change a value of a cell and leave the cell, the property immediately get changed. Using WPF Datagrid, whenever i change a value of a cell, the property gets set only after I leave the row. That is problematic for me. What am I doing wrong? Here is my code: public class MyClass : IEditableObject, INotifyPropertyChanged { string _name, _lastName; public string Name { get { return _name; } set { _name = value; _lastName = value + " xxx"; OnPropertyChanged("LastName"); MessageBox.Show("Test"); } } private void OnPropertyChanged(string p) { var x = new PropertyChangedEventArgs(p); if (PropertyChanged != null) PropertyChanged(this, x); } public string LastName { get { return _lastName; } set { _lastName = value; } } public void BeginEdit() { } public void CancelEdit() { } public void EndEdit() { } public event PropertyChangedEventHandler PropertyChanged; } public class myBindingList : BindingList<MyClass> { public myBindingList() { AllowNew = true; Add(new MyClass { Name = "noam" }); Add(new MyClass { Name = "yael" }); } }

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  • How to wordWrap the text in a column using ObjectListView

    - by Tiago
    For example I have a big sentence: "I like to eat pie and have fun around the house all day long!" And I want it to appear like this: "I like to eat pie and have fun around the house all day long!" In this post: http://stackoverflow.com/questions/1673963/multi-line-list-items-on-winforms-listview-control Grammarian said that you only need to have WordWrap on but I cannot find that option. Thanks for the help in advanced

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  • add data to column series in wpf C#

    - by Archana R
    Hello, I want to create a ColumnSeries Bar Chart in WPF using C#. I shall extract the data from the database and want to bind it to the bar chart. The data extracted will contain two values. First is parameter name(string) and the other is its value(double). Which type of collection shall i use? and how to do the binding? Thanks in advance.

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  • regex search a mysql text column

    - by Ian
    Okay, I thought my head hurt with regular regex, but I can't seem to find what I'm looking for with regexp in mysql. I'm trying to look for situations in news articles where a Textile-formatted url has not ended with a slash so: "Catherine Zeta-Jones":/cr/catherinezeta-jones/ visited stack overflow is ok but "Catherine Zeta-Jones":/cr/catherinezeta-jones visited stack overflow is not. [just used Catherine as an example because I'm assuming an alpha search wouldn't catch the hyphen] One of these days I'll have to do that goat sacrifice so I can gain the proper knowledge of regex. Thanks everyone!

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  • Ruby on Rails has_one Model Not Supplying ID Column

    - by Metric Scantlings
    I have a legacy rails (version 1.2.3) app which runs without issue on a number of servers (not to mention my local environment). Deployed to its newest server, though, and I now get ActiveRecord::StatementInvalid: Mysql::Error: #23000Column 'video_id' cannot be null errors. Below are the models/relationships, simplified: class Video < ActiveRecord::Base has_one(:user, :dependent => :destroy) end class User < ActiveRecord::Base belongs_to(:video) end And below is a rails console transcript of the relationships failing: >> video = Video.create(:title => 'New Video') => #<Video:0xb6d5e31c>... >> video.id => 5 >> video.user = User.create(:name => 'Tester') ActiveRecord::StatementInvalid: Mysql::Error: #23000Column 'video_id' cannot be null: INSERT INTO users (`name`, `video_id`) VALUES('Tester', NULL) from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection_adapters/abstract_adapter.rb:128:in `log' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection_adapters/mysql_adapter.rb:243:in `execute' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection_adapters/mysql_adapter.rb:253:in `insert' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/base.rb:1811:in `create_without_callbacks' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/callbacks.rb:254:in `create_without_timestamps' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/timestamp.rb:39:in `create' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/base.rb:1789:in `create_or_update_without_callbacks' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/callbacks.rb:242:in `create_or_update' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/base.rb:1545:in `save_without_validation' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/validations.rb:752:in `save_without_transactions' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/transactions.rb:129:in `save' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/connection_adapters/abstract/database_statements.rb:59:in `transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/transactions.rb:95:in `transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/transactions.rb:121:in `transaction' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/transactions.rb:129:in `save' from /usr/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/base.rb:451:in `create' from (irb):3 from :0 Has anyone else come across ActiveRecord not sending an ID when it clearly knows it?

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  • T-SQL Right Joins to ALL Entries inc Selected Column

    - by Pace
    Hi Experts, I have the following Query which produces the output below; SELECT TBLUSERS.USERID, TBLUSERS.ADusername, TBLACCESSLEVELS.ACCESSLEVELID, TBLACCESSLEVELS.AccessLevelName FROM TBLACCESSLEVELS INNER JOIN TBLACCESSRIGHTS ON TBLACCESSLEVELS.ACCESSLEVELID = TBLACCESSRIGHTS.ACCESSLEVELID INNER JOIN TBLUSERS ON TBLACCESSRIGHTS.USERID = TBLUSERS.USERID The output is this; 29 administrator 1 AllUsers 29 administrator 2 JobQueue 29 administrator 3 Telephone Directory Admin 29 administrator 4 Jobqueueadmin 29 administrator 5 UserAdmin 29 administrator 6 Product System 27 alan 1 AllUsers 97 andy 1 AllUsers 26 barry 1 AllUsers 26 barry 2 JobQueue 26 barry 3 Telephone Directory Admin 26 barry 4 Jobqueueadmin 26 barry 5 UserAdmin 26 barry 6 Product System 26 barry 7 Newseditor 26 barry 8 GreetingBoard What I would like to do is modify the query so I get all Access Levels regardless of weather there is an entry for that user. What I would also like to do is some sort of exist case so that I get output like the following; 29 administrator 1 AllUsers True 29 administrator 2 JobQueue True 29 administrator 3 Telephone Directory Admin True 29 administrator 4 Jobqueueadmin True 29 administrator 5 UserAdmin True 29 administrator 6 Product System True 29 administrator 7 Newseditor False 29 administrator 8 GreetingBoard False 27 alan 1 AllUsers True 27 alan 2 JobQueue False 27 alan 3 Telephone Directory Admin False 27 alan 4 Jobqueueadmin False 27 alan 5 UserAdmin False 27 alan 6 Product System False 27 alan 7 Newseditor False 27 alan 8 GreetingBoard False 97 andy 1 AllUsers True 97 andy 2 JobQueue False 97 andy 3 Telephone Directory Admin False 97 andy 4 Jobqueueadmin False 97 andy 5 UserAdmin False 97 andy 6 Product System False 97 andy 7 Newseditor False 97 andy 8 GreetingBoard False 26 Barry 1 AllUsers True 26 Barry 2 JobQueue True 26 Barry 3 Telephone Directory Admin True 26 Barry 4 Jobqueueadmin True 26 Barry 5 UserAdmin True 26 Barry 6 Product System True 26 Barry 7 Newseditor True 26 Barry 8 GreetingBoard True ......................................... So the rules are ALWAYS show ALL Entries for ACCESSLEVELS and where EXISTS in ACCESSRIGHTS produce a true / false to show this. I hope this makes sense and hopefully you dont need the table definitions as everything I need to work with is in the original Query. I just need a way of manipulating it slightly and getting the join in the right place. Thank you. Pace

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  • Google Spreadsheet multiple column filter using OR

    - by thefroatgt
    I have a Google Spreadsheet with 3 columns which are either blank or have a value. I want to get the count of the number of rows that has A and either B or C populated. If I were writing a SQL query it would be select count(*) from Table where A is not null and (B is not null or C is not null) But I can't for the life of me figure out how to get this in a Google Spreadsheet

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  • Incorrect rendering in dojox charting stacked column?

    - by FokeyJoe
    Hiya, I seem to be having a problem with my dojo stackedcolumn whereby the scale of some of the bars is correct for some x-axis points, but not others. Here's my code (observe the northern ireland hydro should be 70, but only shows as around 30): dojo.addOnLoad(function() { var chart1 = new dojox.charting.Chart2D("sitesbycountry"); chart1.addPlot("default", {type: "StackedColumns", gap: 10}); chart1.addPlot("horzgrid", {type: "Grid", hMajorLines: true, vMajorLines: false}); chart1.addAxis("x", {labels: [{value: 1, text: 'Northern Ireland'}, {value: 2, text: 'Wales'}, {value: 3, text: 'Scotland'}, {value: 4, text: 'England'}], minorTicks: false, microTicks: false}); chart1.addAxis("y", {vertical: true, minorTicks: false, microTicks: false}); chart1.addSeries("Hydro", [70, 53, 198, 102], {fill: "#ddddff"}); chart1.addSeries("Wind and Wave", [67, 51, 150, 245], {fill: "#FEFFBF"}); chart1.addSeries("Landfill", [1, 23, 40, 0], {fill: "#CFFFD1"}); chart1.addSeries("Other Biofuels and Wastes", [4, 3, 11, 66], {fill: "#DFD2C3"}); chart1.render(); }); Is this a behaviour of the chart that I'm not aware of? TIA FokeyJoe

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  • Querying a Cassandra column family for rows that have not been updated in X days

    - by knorv
    I'm moving an existing MySQL based application over to Cassandra. So far finding the equivalent Cassandra data model has been quite easy, but I've stumbled on the following problem for which I'd appreciate some input: Consider a MySQL table holding millions of entities: CREATE TABLE entities ( id INT AUTO_INCREMENT NOT NULL, entity_information VARCHAR(...), entity_last_updated DATETIME, PRIMARY KEY (id), KEY (entity_last_updated) ); The table is regularly queried for entities that need to be updated: SELECT id FROM entities WHERE entity_last_updated IS NULL OR entity_last_updated < DATE_ADD(NOW(), INTERVAL -7*24 HOUR) ORDER BY entity_last_updated ASC; The entities returned by this queries are then updated using the following query: UPDATE entities SET entity_information = ?, entity_last_updated = NOW() WHERE id = ?; What would be the corresponding Cassandra data model that would allow me to store the given information and effectively query the entities table for entities that need to be updated (that is: entities that have not been updated in the last seven days)?

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  • Using sql column names in hibernate createSQlquery result

    - by Ricardo
    Hi all, i have a couple of sql views with composite primary keys that i want to query, and since Hibernate makes it a pain to work with composite keyes, im using createSQLQuery. The problem is that this method can only return a List, and i need to refer to the colums by their index. Any chance i could do like jdbc and refer to the columns by their sql name insted of their index? thanks

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  • Replace column value with description

    - by shoden
    How to replace cell value with their description. This is my grid <telerik:RadGrid ID="RadGrid1" runat="server" DataSourceID="SqlDataSource1" GridLines="None"> <HeaderContextMenu EnableAutoScroll="True"> </HeaderContextMenu> <MasterTableView AutoGenerateColumns="False" DataKeyNames="OrderID" DataSourceID="SqlDataSource1"> <RowIndicatorColumn> <HeaderStyle Width="20px"></HeaderStyle> </RowIndicatorColumn> <ExpandCollapseColumn> <HeaderStyle Width="20px"></HeaderStyle> </ExpandCollapseColumn> <Columns> <telerik:GridBoundColumn DataField="OrderID" DataType="System.Int32" HeaderText="OrderID" ReadOnly="True" SortExpression="OrderID" UniqueName="OrderID"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="CustomerID" HeaderText="CustomerID" SortExpression="CustomerID" UniqueName="CustomerID"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="OrderDate" DataType="System.DateTime" HeaderText="OrderDate" SortExpression="OrderDate" UniqueName="OrderDate"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="RequiredDate" DataType="System.DateTime" HeaderText="RequiredDate" SortExpression="RequiredDate" UniqueName="RequiredDate"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="ShipName" HeaderText="ShipName" SortExpression="ShipName" UniqueName="ShipName"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="ShipAddress" HeaderText="ShipAddress" SortExpression="ShipAddress" UniqueName="ShipAddress"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="ShipCity" HeaderText="ShipCity" SortExpression="ShipCity" UniqueName="ShipCity"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="ShipRegion" HeaderText="ShipRegion" SortExpression="ShipRegion" UniqueName="ShipRegion"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="ShipPostalCode" HeaderText="ShipPostalCode" SortExpression="ShipPostalCode" UniqueName="ShipPostalCode"> </telerik:GridBoundColumn> <telerik:GridBoundColumn DataField="ShipCountry" HeaderText="ShipCountry" SortExpression="ShipCountry" UniqueName="ShipCountry"> </telerik:GridBoundColumn> </Columns> </MasterTableView> </telerik:RadGrid> This grid will load Orders table. How to replace CustomerID with CompanyName which is come from Customers table during run time?

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  • Detecting duplicate values in a column of a Datatable while traversing through It

    - by Ashish Gupta
    I have a Datatable with Id(guid) and Name(string) columns. I traverse through the data table and run a validation criteria on the Name (say, It should contain only letters and numbers) and then adding the corresponding Id to a List If name passes the validation. Something like below:- List<Guid> validIds=new List<Guid>(); foreach(DataRow row in DataTable1.Rows) { if(IsValid(row["Name"]) { validIds.Add((Guid)row["Id"]); } } In addition to this validation I should also check If the name is not repeating in the whole datatable (even for the case-sensitiveness), If It is repeating, I should not add the corresponding Id in the List. Things I am thinking/have thought about:- 1) I can have another List, check for the "Name" in the same, If It exists, will add the corresponding Guild 2) I cannot use HashSet as that would treat "Test" and "test" as different strings and not duplicates. 3) Take the DataTable to another one where I have the disctict names (this I havent tried and the code might be incorrect, please correct me whereever possible) DataTable dataTableWithDistinctName = new DataTable(); dataTableWithDistinctName.CaseSensitive=true CopiedDataTable=DataTable1.DefaultView.ToTable(true,"Name"); I would loop through the original datatable and check the existence of the "Name" in the CopiedDataTable, If It exists, I wont add the Id to the List. Are there any better and optimum way to achieve the same? I need to always think of performance. Although there are many related questions in SO, I didnt find a problem similar to this. If you could point me to a question similar to this, It would be helpful. Thanks

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  • Nullable Date column merge problem

    - by Vladimir
    I am using JPA with openjpa implementation beneath, on a Geronimo application server. I am also using MySQL database. I have a problem with updating object with nullable Date property. When I'm trying to merge entity with Date property set to null, no sql update script is generated (or when other fields are modified, sql update script is generated, but date field is ommited from it). If date field is set to some other not null value, update script is properly generated. Did anyone have problem like that?

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  • Passing sql results to views hard-codes views to database column names

    - by Galen
    I just realized that i may not be following best practices in regards to the MVC pattern. My issue is that my views "know" information about my database Here's my situation in psuedo code... My controller invokes a method from my model and passes it directly to the view view.records = tableGateway.getRecords() view.display() in my view each records as record print record.name print record.address ... In my view i have record.name and record.address, info that's hard-coded to my database. Is this bad? What other ways around it are there other than iterating over everything in the controller and basically rewriting the records collection. And that just seems silly. Thanks

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  • how to sum the amount of cells with the same number in a column - Microsoft Excel 2010

    - by jerlebrink
    My english isn't that good, I hope you understand what I wan't to accomplish I have a column (A) with different zip codes ( total of 3583 rows). I need a formula/function to go through each cell and the come up with sum of how many instances (column B) there are of the same zip code (column C).There are probably more than hundred different zip codes so I can't do it manually. Thanks in advance.

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  • Column locking in innodb?

    - by ming yeow
    I know this sounds weird, but apparently one of my columns is locked. select * from table where type_id = 1 and updated_at < '2010-03-14' limit 1; select * from table where type_id = 3 and updated_at < '2010-03-14' limit 10; the first one would not finish running even in a few hours, while the second one completes smoothly. the only difference is the type_id between the 2 queries. a bit of background, the first statement screwed up before which i had to kill manually. Thanks in advance for your help - i have an urgent data job to finish, and this problem is driving me crazy

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  • Join column with different collation issue

    - by George2
    Hello everyone, I am using SQL Server 2005. I have two tables, and they are using different collations. It is not allowed to concatenate columns from tables with different collations, for example the following SQL is not allowed, select table1column1 + table2column2 from ... My question is, why concatenation of two columns from different collations is not allowed from database engine design perspective? I do not know why collation will impact results, the result is just concatenating strings -- should be simple enough and not dependent on collation... thanks in advance, George

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  • vestal_versions : problem with column named changes

    - by arkannia
    Hi, I am working with vestal version for 2 months. Everything was fine until this afternoon. I didn't done anything special(or i don't remembered...) but the code works fine on others computers... The problem is that i'm not able to save my model anymore: rails give me this error : ActiveRecord::DangerousAttributeError: changes is defined by ActiveRecord changes field is by default an activerecord method. With the console, the message is the next : ActiveRecord::DangerousAttributeError: changes is defined by ActiveRecord Here are my local gem files: abstract (1.0.0) actionmailer (3.0.0.beta3) actionpack (3.0.0.beta3) activemodel (3.0.0.beta3) activerecord (3.0.0.beta3) activeresource (3.0.0.beta3) activesupport (3.0.0.beta3) arel (0.3.3) builder (2.1.2) bundler (0.9.25, 0.9.24) crack (0.1.7) erubis (2.6.5) god (0.9.0) haml (3.0.1, 2.2.23) i18n (0.3.7) mail (2.2.0) memcache-client (1.8.3) memcached (0.17.7) mime-types (1.16) polyglot (0.3.1) rack (1.1.0) rack-mount (0.6.3) rack-test (0.5.3) rails (3.0.0.beta3) railties (3.0.0.beta3) rake (0.8.7) savon (0.7.8, 0.7.6) text-format (1.0.0) text-hyphen (1.0.0) thor (0.13.6, 0.13.4) treetop (1.4.5) tzinfo (0.3.20) And here my Gemfile source 'http://gemcutter.org' gem "rails", "3.0.0.beta3" gem "will_paginate", "3.0.pre" #gem 'nokogiri' #gem 'curb' #gem 'handsoap' gem 'savon' gem 'mysql' gem 'haml', '2.2.23' #gem 'haml', '3.0.1' gem 'hpricot' gem 'i18n', '> 0.3.5' gem 'i18n_routing' gem 'i18n_auto_scoping' gem 'handler301', :git => 'http://github.com/kwi/handler301.git' gem 'seo_meta_builder' gem 'vestal_versions' #gem 'paperclip', :git => 'git://github.com/thoughtbot/paperclip.git', :branch => 'rails3' ## Bundle edge rails: gem "rails", :git => "git://github.com/rails/rails.git" ## Bundle the gems you use: # gem "bj" # gem "hpricot", "0.6" # gem "sqlite3-ruby", :require => "sqlite3" # gem "aws-s3", :require => "aws/s3" ## Bundle gems used only in certain environments: # gem "rspec", :group => :test # group :test do # gem "webrat" # end If you have any suggestions to solve this issue, i'll be glad to hear them ! Thanks

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