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  • how do I remove rows/columns from this matrix using python

    - by banditKing
    My matrix looks like this. ['Hotel', ' "excellent"', ' "very good"', ' "average"', ' "poor"', ' "terrible"', ' "cheapest"', ' "rank"', ' "total reviews"'] ['westin', ' 390', ' 291', ' 70', ' 43', ' 19', ' 215', ' 27', ' 813'] ['ramada', ' 136', ' 67', ' 53', ' 30', ' 24', ' 149', ' 49', ' 310 '] ['sutton place', '489', ' 293', ' 106', ' 39', ' 20', ' 299', ' 24', ' 947'] ['loden', ' 681', ' 134', ' 17', ' 5', ' 0', ' 199', ' 4', ' 837'] ['hampton inn downtown', ' 241', ' 166', ' 26', ' 5', ' 1', ' 159', ' 21', ' 439'] ['shangri la', ' 332', ' 45', ' 20', ' 8', ' 2', ' 325', ' 8', ' 407'] ['residence inn marriott', ' 22', ' 15', ' 5', ' 0', ' 0', ' 179', ' 35', ' 42'] ['pan pacific', ' 475', ' 262', ' 86', ' 29', ' 16', ' 249', ' 15', ' 868'] ['sheraton wall center', ' 277', ' 346', ' 150', ' 80', ' 26', ' 249', ' 45', ' 879'] ['westin bayshore', ' 390', ' 291', ' 70', ' 43', ' 19', ' 199', ' 813'] I want to remove the top row and the 0th column from this and create a new matrix. How do I do this? Normally in java or so Id use the following code: for (int y; y< matrix[x].length; y++) for(int x; x < matrix[Y].length; x++) { if(x == 0 || y == 0) { continue } else { new_matrix[x][y] = matrix[x][y]; } } Is there a way such as this in python to iterate and selectively copy elements? Thanks EDIT Im also trying to convert each matrix element from a string to a float as I iterate over the matrix. This my updated modified code based on the answer below. A = [] f = open("csv_test.csv",'rt') try: reader = csv.reader(f) for row in reader: A.append(row) finally: f.close() new_list = [row[1:] for row in A[1:]] l = np.array(new_list) l.astype(np.float32) print l However Im getting an error --> l.astype(np.float32) print l ValueError: setting an array element with a sequence.

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  • Best way to order by columns in relationships?

    - by Timmy
    im using sqlalchemy, and i have a few polymorphic tables, and i want to sort by a column in one of the relationship. i have tables a,b,c,d, with relationship a to b, b to c, c to d. a to b is one-to-many b to c and c to d are one-to-one, but polymorphic. given an item in table a, i will have a list of items b, c, d (all one to one). how do i use sqlalchemy to sort them by a column in table d?

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  • GROUP BY on multiple columns

    - by Tams
    I have a table that looks like the following - Id Reference DateAttribute1 DateAttribute2 1 MMM005 2011-09-11 2012-09-10 2 MMM005 2012-06-13 2012-09-10 3 MMM006 2012-08-22 2012-09-10 4 MMM006 2012-08-22 2012-09-11 I have handle to the id values. I would like to query such that I get the following result Id Reference DateAttribute1 DateAttribute2 2 MMM005 2012-06-13 2012-09-10 4 MMM006 2012-08-22 2012-09-11 I would like my result to be grouped by reference and then 'DateAttribute1' and then 'DateAttribute2' as such - DateAttribute1 has a priority over DateAttribute2 as you can see above in the result. How should I write my query to fetch the results in the above manner? Any solution?

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  • Help constructing query - Compare columns and replace numbers

    - by Tommy
    I have a feeling that this query is pretty easy to construct, I just can't figure it out. I want to replace all numbers in table X column C, with numbers in table Z column A, where numbers from table X column C matches numbers in table Z column B. I hope that makes sense. Perhaps a little background information will make it clearer. I've converted from one CMS to another, and the module I used to convert mapped the ids to the new database. Table X column A is the new id's. Table X column B is the old id's. Table Z is the table for an image gallery that I migrated, and column C contains the id's of the images owners. Can anyone crack this nut?

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  • How to sort MySQL query by two columns

    - by user334269
    The following is my DB data, how can I sorting it by sid and prev_sid with php/mysql!? sid prev_sid type 000 197 app_home 197 198 page_teach 198 218 page_teach 199 211 page_step 211 207 link 218 559 page_step 559 199 page_step Result: sid prev_sid type 000 197 app_home 197 198 page_teach 198 218 page_teach 218 559 page_step 559 199 page_step 199 211 page_step 211 207 link 000 197 198 218 559 199 199 211 207

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  • restrict duplicate rows in specific columns in mysql

    - by JPro
    I have a query like this : select testset, count(distinct results.TestCase) as runs, Sum(case when Verdict = "PASS" then 1 else 0 end) as pass, Sum(case when Verdict <> "PASS" then 1 else 0 end) as fails, Sum(case when latest_issue <> "NULL" then 1 else 0 end) as issues, Sum(case when latest_issue <> "NULL" and issue_type = "TC" then 1 else 0 end) as TC_issues from results join testcases on results.TestCase = testcases.TestCase where platform = "T1_PLATFORM" AND testcases.CaseType = "M2" and testcases.dummy <> "flag_1" group by testset order by results.TestCase The result set I get is : testset runs pass fails issues TC_issues T1 66 125 73 38 33 T2 18 19 16 16 15 T3 57 58 55 55 29 T4 52 43 12 0 0 T5 193 223 265 130 22 T6 23 12 11 0 0 My problem is, this is a result table which has testcases running multiple times. So, I am able to restrict the runs using the distinct TestCases but when I want the pass and fails, since I am using case I am unable to eliminate the duplicates. Is there any way to achieve what I want? any help please? thanks.

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  • Removing spaces from columns of a CSV file in bash

    - by vikas ramnani
    I have a CSV file in which every column contains unnecessary spaces(or tabs) after the actual value. I want to create a new CSV file removing all the spaces using bash. For example One line in input CSV file value1 ;value2 ;value3 ;value4 same line in output csv file should be value1;value2;value3;value4 I tried using awk to trim each column but it didnt work. Can anyone please help me on this ? Thanks in advance :)

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  • select distinct over specific columns

    - by Midhat
    A query in a system I maintain returns QID AID DATA 1 2 x 1 2 y 5 6 t As per a new requirement, I do not want the (QID, AID)=(1,2) pair to be repeated. We also dont care what value is selected from "data" column. either x or y will do. What I have done is to enclose the original query like this SELECT * FROM (<original query text>) Results group by QID,AID Is there a better way to go about this? The original query uses multiple joins and unions and what not, So I would prefer not to touch it unless its absolutely necesary

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  • Accessing Arbitrary Columns from an R Data Frame using with()

    - by johnmyleswhite
    Suppose that I have a data frame with a column whose name is stored in a variable. Accessing this column using the variable is easy using bracket notation: df <- data.frame(A = rep(1, 10), B = rep(2, 10)) column.name <- 'B' df[,column.name] But it is not obvious how to access an arbitrary column using a call to with(). The naive approach with(df, column.name) effectively evaluates column.name in the caller's environment. How can I delay evaluation sufficiently that with() will provide the same results that brackets give?

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  • Align two columns with CSS

    - by user1853172
    I have markup like <div> <label for="a" class="float-left">column 1 row 1</label> <input type="text" value="column 2 row 1" id="a" class="float-left"/> <div class="float-clear"></div> <div> <label for="b" class="float-left">longer column 1 row 2</label> <input class="float-left" type="text" value="column 2 row 2" id="b" /> <div class="float-clear"></div> <div> <label class="float-left" for="c">column 1 row 2</label> <input class="float-left" type="checkbox" id="c" /> How can I make column two rows to be aligned on the left, currently they are positioned depending on the length of the the text in the label? I don't want a full CSS grid just for this one place where I need alignment.

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  • Using SQLAlchemy, how can I return a count with multiple columns

    - by Andy
    I am attempting to run a query like this: SELECT comment_type_id, name, count(comment_type_id) FROM comments, commenttypes WHERE comment_type_id=commenttypes.id GROUP BY comment_type_id Without the join between comments and commenttypes for the name column, I can do this using: session.query(Comment.comment_type_id,func.count(Comment.comment_type_id)).group_by(Comment.comment_type_id).all() However, if I try to do something like this, I get incorrect results: session.query(Comment.comment_type_id, Comment.comment_type, func.count(Comment.comment_type_id)).group_by(Comment.comment_type_id).all() I have two problems with the results: (1, False, 82920) (2, False, 588) (3, False, 4278) (4, False, 104370) Problems: The False is not correct The counts are wrong My expected results are: (1, 'Comment Type 1', 13820) (2, 'Comment Type 2', 98) (3, 'Comment Type 2', 713) (4, 'Comment Type 2', 17395) How can I adjust my command to pull the correct name value and the correct count?

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  • SQL - Getting Most Recent Date From Multiple Columns

    - by ScottSEA
    Assume a rowset containing the following EntryID Name DateModified DateDeleted ----------------------------------------------- 1 Name1 1/2/2003 NULL 2 Name1 1/3/2005 1/5/2008 3 Name1 1/3/2006 NULL 4 Name1 NULL NULL 5 Name1 3/5/2008 NULL I need to return the largest (i.e. most recent) non-null date from DateModified and DateDeleted, in this case 3/5/2008.

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  • ASP.NET Grid with CSS in Rows and Columns

    - by user1089173
    I have the following code List<Department> depts = new List<Department>(); Department.Add(new Department() { DNo = 1, DName = "Accounting", DFloor="6" }); Department.Add(new Department() { DNo = 2, DName = "FInance", DFloor="3" }); I want to bind this data to a GridView, so that it outputs the following. Observe the classes on each th and tr. How can I achieve this in ASP.NET? <thead> <tr> <th class="DNo">DNo</th> <th class="DName">DName</th> <th class= "DFloor">DFloor</th> </tr> </thead> <tr> <td class="DNo">1</td> <td class="DName">Accounting</td> <td class="DFloor">6</td> </tr> <tr> <td class="DNo">2</td> <td class="DName">FInance</td> <td class="DFloor">3</td> </tr>

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  • how to render custom columns with a GenericTreeModel

    - by Giorgio Gelardi
    I have to display some data in a treeview. The "real" data model is huge and I cannot copy all the stuff in a TreeStore, so I guess I should use a GenericTreeModel to act like a virtual treeview. Btw the first column is the classic icon+text style and I think I should declare a column with a CellRendererPixbuf (faq sample), but I'm not sure what the model methods on_get_n_columns() and on_get_value() should return. It's both a Pixbuf and a string value for the same column. Any help will be appreciated.

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  • Is there a %in% operator accros multiple columns

    - by RobinLovelace
    Imagine you have two data frames df1 <- data.frame(V1 = c(1, 2, 3), v2 = c("a", "b", "c")) df2 <- data.frame(V1 = c(1, 2, 2), v2 = c("b", "b", "c")) Here's what they look like, side by side: > cbind(df1, df2) V1 v2 V1 v2 1 1 a 1 b 2 2 b 2 b 3 3 c 2 c You want to know which observations are duplicates, across all variables. This can be done by pasting the cols together and then using %in%: df1Vec <- apply(df1, 1, paste, collapse= "") df2Vec <- apply(df2, 1, paste, collapse= "") df2Vec %in% df1Vec [1] FALSE TRUE FALSE The second observation is thus the only one in df2 and also in df1. Is there no faster way of generating this output - something like %IN%, which is %in% across multiple variables, or should we just be content with the apply(paste) solution?

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  • join two tables but want one matching columns instead of showing it separately sql server 2008

    - by amby
    Hi i want to display join result of two tables but don't want to show matching column separately. I want it one instead of two. so please tell me what query should i use for this. I m using sql server 2008 and my query is like: select * from Customer_Order, optRelation where Customer_Order.orderNumber = optRelation.orderNumber AND optRelation.orderNumber = 21. please reply soon

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  • Make 2 links same height in columns?

    - by brother
    I have a setup where i have a unordered list on a page with x <li><a href="#">Link text</a></li>. They are via CSS set to 50% width each, so that i have 2 items on each line. My problem is that 2 links on one line, can vary in height as they have different link text. My question is; how can i, via jQuery, set the same height for each (the a is styles with a border bottom, so it would look best if they alined) on the same line? But not all in the sections should have the same height, only on a "pr line" basis. Hope it makes sence :)

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  • Mysql ADDDATE() or DATE_ADD() with table columns?

    - by John
    How do I do something like the following SELECT ADDDATE(t_invoice.last_bill_date, INTERVAL t_invoice.interval t_invoice.interval_unit) FROM t_invoice ...where the column t_invoice.last_bill_date is a date, t_invoice.interval is an integer and t_invoice.interval_unit is a string. Basically, I want to determine a person's next bill date based on his desired billing frequency. Is there a better way to achieve this?

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  • MySQL some columns Distinct

    - by Adam
    I have the following query that works well. SELECT DISTINCT city,region1,region2 from static_geo_world where country='AU' AND (city LIKE '%geel%' OR region1 LIKE '%geel%' OR region2 LIKE '%geel%' OR region3 LIKE '%geel%' OR zip LIKE 'geel%') ORDER BY city; I need to also extract a column named 'id' but this messes up the DISTINCT as each ID is different. How can I get the same UNIQUE set of records as above but also get the 'id' for each record? Note: sometimes I can return a few thousand records so a query for each record isn't possible. Any ideas would be very welcome...

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  • JDBC delete statement with multiple columns

    - by user1643033
    It says I ended this statement wrong when if I input it into sql plus with just the addition of ; it works perfectly. What am I doing wrong? Statement statement = connection.createStatement(); statement.executeUpdate("delete from aplbuk MODEL = '"+ textField_4.getText() + "'AND year = '" + textField_1.getText() + "' AND Litres = '" + textField_2.getText() + "' AND ENGINE_TYPE = '" + textField_3.getText() + "'"); statement.close();

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