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  • Creating a Colormap Legend in Matplotlib

    - by Vince
    Hi fellow Stackers! I am using imshow() in matplotlib like so: import numpy as np import matplotlib.pyplot as plt mat = '''SOME MATRIX''' plt.imshow(mat, origin="lower", cmap='gray', interpolation='nearest') plt.show() How do I add a legend showing the numeric value for the different shades of gray. Sadly, my googling has not uncovered an answer :( Thank you in advance for the help. Vince

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  • What is the difference between a segmentation fault and a stack overflow?

    - by AruniRC
    For example when we call say, a recursive function, the successive calls are stored in the stack. However, due to an error if it goes on infinitely the error is 'Segmentation fault' (as seen on GCC). Shouldn't it have been 'stack-overflow'? What then is the basic difference between the two? Btw, an explanation would be more helpful than wikipedia links (gone through that, but no answer to specific query).

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  • Ext JS UX - RowPanelExpander

    - by alexn
    I have this plugin. It works great with gridPanel. But there are some problems with editorGridPanel. After editing of some row plugin stops work. Maybe someone can fix this problem? I looked at code, but cant find answer....

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  • Asp.net Security: IIdentity.IsAuthenticated default implementation.

    - by Pickels
    Hello Stackoverflowers, I am writing my own custom Identity class which implements IIdentity. I don't need to change the default method IsAuthenticated but so now I was wondering how does the default IIdentity determines if it should return true or false? I thought to find the answer in the FormsAuthenticationTicket I am using but not sure if that is correct. Thanks in advance, Pickels

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  • Does oneway declaration in Android .aidl guarantee that method will be called in a separate thread?

    - by Dan Menes
    I am designing a framework for a client/server application for Android phones. I am fairly new to both Java and Android (but not new to programming in general, or threaded programming in particular). Sometimes my server and client will be in the same process, and sometimes they will be in different processes, depending on the exact use case. The client and server interfaces look something like the following: IServer.aidl: package com.my.application; interface IServer { /** * Register client callback object */ void registerCallback( in IClient callbackObject ); /** * Do something and report back */ void doSomething( in String what ); . . . } IClient.aidl: package com.my.application; oneway interface IClient { /** * Receive an answer */ void reportBack( in String answer ); . . . } Now here is where it gets interesting. I can foresee use cases where the client calls IServer.doSomething(), which in turn calls IClient.reportBack(), and on the basis of what is reported back, IClient.reportBack() needs to issue another call to IClient.doSomething(). The issue here is that IServer.doSomething() will not, in general, be reentrant. That's OK, as long as IClient.reportBack() is always invoked in a new thread. In that case, I can make sure that the implementation of IServer.doSomething() is always synchronized appropriately so that the call from the new thread blocks until the first call returns. If everything works the way I think it does, then by declaring the IClient interface as oneway, I guarantee this to be the case. At least, I can't think of any way that the call from IServer.doSomething() to IClient.reportBack() can return immediately (what oneway is supposed to ensure), yet IClient.reportBack still be able to reinvoke IServer.doSomething recursively in the same thread. Either a new thread in IServer must be started, or else the old IServer thread can be re-used for the inner call to IServer.doSomething(), but only after the outer call to IServer.doSomething() has returned. So my question is, does everything work the way I think it does? The Android documentation hardly mentions oneway interfaces.

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  • How to create a UserProfile form in Django with first_name, last_name modifications ?

    - by Natim
    If think my question is pretty obvious and almost every developer working with UserProfile should be able to answer it. However, I could not find any help on the django documentation or in the Django Book. When you want to do a UserProfile form in with Django Forms, you'd like to modify the profile fields as well as some User field. But there is no forms.UserProfileForm (yet?) ! How do you do that ?

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  • API to determine cell carrier?

    - by Chris Lively
    Is there a free API or some other way to determine what carrier a cell phone number is registered with? I'd like my application to broadcast text messages without them picking their carrier from a list. UPDATE: Interestingly, a coworker found the answer: http://developer.whitepages.com/ UPDATE2: Well the whitepages license agreement is so restrictive that you can't build an app for it. Any other ideas?

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  • WCF Web Services and native ASP.NET Health Monitoring

    - by elsharpo
    hi guys, I need a final answer to the following question! :-) I was wondering if you can enable Health Monitoring for WCF Web services. I'm hosting a number of services in IIS and configured it to send the team email notification when any exceptions are thrown. I feel that Health Monitoring does not work with WCF Services and that I have to configure WCF Tracing http://msdn.microsoft.com/en-us/library/ms733025.aspx Thank you

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  • How to pass parameters to stored procedure ?

    - by Kumara
    I used SQL Server 2005 for my small web application. I Want pass parameters to SP . But there is one condition. number of parameter that can be change time to time. Think ,this time i pass neme and Address , next time i pass name,sirname,address , this parameter range may be 1-30 , Please send any answer if you have,Thanks

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  • What is BLAS DGEMV error code -6 mean?

    - by Halpo
    I have a program that runs through R but uses the BLAS routines. It runs through correctly about 8 times but then throws an error BLAS/LAPACK routine 'DGEMV ' gave error code -6 What does this error code mean. I cant find the answer online but I'm sure there is someone here that knows it.

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  • Amazon SimpleDB Identity Seed equivalent

    - by Zaff
    Is there an equivalent to an identity Seed in SimpleDB? If the answer is no, how do you handle creating something like a customer number or order number that will prevent the creation duplicate numbers? My experience is mainly from SQL Server in which I would either create a primary key with an identity seed or use transactions in a stored procedure to increment the number. Thanks for your help!

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  • Trying to send email in Java using gmail always results in username and password not accepted.

    - by Thaeos
    When I call the send method (after setting studentAddress), I get this: javax.mail.AuthenticationFailedException: 535-5.7.1 Username and Password not accepted. Learn more at 535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257 y15sm906936wfd.10 I'm pretty sure the code is correct, and 100% positive that the username and password details I'm entering are correct. So is this something wrong with gmail or what? This is my code: import java.util.*; import javax.mail.*; import javax.mail.internet.*; public class SendEmail { private String host = "smtp.gmail.com"; private String emailLogin = "[email protected]"; private String pass = "xxx"; private String studentAddress; private String to; private Properties props = System.getProperties(); public SendEmail() { props.put("mail.smtps.auth", "true"); props.put("mail.smtps.starttls.enable", "true"); props.put("mail.smtp.host", host); props.put("mail.smtp.user", emailLogin); props.put("mail.smtp.password", pass); props.put("mail.smtp.port", "587"); to = "[email protected]"; } public void setStudentAddress(String newAddress) { studentAddress = newAddress; } public void send() { Session session = Session.getDefaultInstance(props, null); MimeMessage message = new MimeMessage(session); try { message.setFrom(new InternetAddress(emailLogin)); InternetAddress[] studentAddressList = {new InternetAddress(studentAddress)}; message.setReplyTo(studentAddressList); message.setRecipient(Message.RecipientType.TO, new InternetAddress(to)); message.setSubject("Test Email"); message.setText("This is a test email!"); Transport transport = session.getTransport("smtps"); transport.connect(host, emailLogin, pass); transport.sendMessage(message, message.getAllRecipients()); transport.close(); } catch (MessagingException me) { System.out.println("There has been an email error!"); me.printStackTrace(); } } } Any ideas...

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  • What is the correct pronunciation of Cocoa?

    - by Nathan S.
    The question says it all: is it coke-ah, co-co, co-co-ah or something else entirely? I've read articles claiming different pronunciations, although there seems to be some consensus towards co-co (e.g. http://www.cocoacrumbs.com/blog/?p=5) Any definitive references that will answer the question for sure?

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  • active_scaffold routing error

    - by Elizabeth Buckwalter
    If you haven't seen my question yesterday, this is my second rails app. The first went nice and smooth, but this one keeps giving me one random error after another. I installed active_scaffold for this app as well as the last app (the first error, instead of using script/install plugin git://active_scaffold repository, I did script/install plugin http://active_scaffold repository.) I didn't want to spell out basic CRUD on minor models. After the install problems, (before I found the http solution from a windows user when I'm on Linux) I thought I'd try out Hobo. Well, Hobo updated actionmailer, actionpack, activerecord, activeresource, and installed rack. Rails isn't even using the updated versions. But as you can see at the bottom of the trace it's using rack. I have a feeling it has something to do with my futzing around with installing Hobo which I uninstalled. Thanks in advanced. [Edit] I had asked the question over at the ActiveScaffold Group the answer (if you don't want to follow the link) was that this line needed to be added to routes: map.resources :modelName, :active_scaffold => true It doesn't entirely answer my question, since the documentation said nothing about changing routes. But, it works. [/Edit] ActionController::RoutingError in Departments#index Showing vendor/plugins/active_scaffold/frontends/default/views/_list_header.html.erb where line #8 raised: No route matches {:_method=:get, :action="show_search", :controller="departments"} Extracted source (around line #8): 5: <% next if controller.respond_to? link.security_method and !controller.send(link.security_method) -%> 6: <% next if link.action == 'new' && params[:nested].nil? && active_scaffold_config.list.always_show_create %> 7: <% next if link.action == 'show_search' && active_scaffold_config.list.always_show_search %> 8: <%= render_action_link(link, new_params) -%> 9: <% end -%> 10: 11: <%= loading_indicator_tag(:action => :table) %> Trace of template inclusion: vendor/plugins/active_scaffold/frontends/default/views/list.html.erb Full Trace It was taking forever to format it. I'm still not fully conversant in SO's formatting (sometimes the server is down. reboots are reinstalls. it's a play server)

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  • Nonblocking texture upload on iPhone and other OpenGL ES platforms

    - by spurserh
    Hello, I am doing some work which involves drawing video frames in real time in OpenGL ES. Right now I am using glTexImage2D to transfer the data, in the absence of Pixel Buffer Objects and the like. A below answer suggests that glTexImage2D is always blocking, even if texture object referenced does is not used for any drawing. Is there a way to do a nonblocking texture upload with OpenGL ES (any version)? Thank you very much, Sean

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  • Which are good programming forums where i can post a GUI programming articles?

    - by Lothar
    I have written larger article about GUI programming explaining why i want to design a new GUI library. Which Website (Programming Forum) would you recommand for posting and discussing. Something like SlashDot. Unfortunately they focus on IT news and not programming and i'm not aware of anything which comes even "slightly close to the volumne of SlashDot readers. The answer with an URL pointing to the highest traffic programming forum will get accepted.

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  • Jquery Tools Overlay call on javascript function

    - by user342944
    Hi Guys, I have a jquery overlay window in my html alongwith a button to activate here is the code. <!-- Validation Overlay Box --> <div class="modal" id="yesno" style="top: 100px; left: 320px; position: relative; display: none; z-index: 0; margin-top: 100px;"> <h2> &nbsp;&nbsp;Authentication Failed</h2> <p style="font-family:Arial; font-size:small; text-align:center"> Ether your username or password has been entered incorrectly. Please make sure that your username or password entered correctly... </p> <!-- yes/no buttons --> <p align="center"> <button class="close"> OK </button> </p> </div> Here is the Jquery tools Script <SCRIPT> $(document).ready(function() { var triggers = $(".modalInput").overlay({ // some mask tweaks suitable for modal dialogs mask: { color: '#a2a2a2', loadSpeed: 200, opacity: 0.9 }, closeOnClick: false }); var buttons = $("#yesno button").click(function(e) { // get user input var yes = buttons.index(this) === 0; // do something with the answer triggers.eq(0).html("You clicked " + (yes ? "yes" : "no")); }); $("#prompt form").submit(function(e) { // close the overlay triggers.eq(1).overlay().close(); // get user input var input = $("input", this).val(); // do something with the answer triggers.eq(1).html(input); // do not submit the form return e.preventDefault(); }); }); And here how its called upon clicking on a button or a hyperlink "<BUTTON class="modalInput" rel="#yesno">You clicked no</BUTTON>" All i want is I dont want to show the overlay on clicking on button or through a link. Is it possible to call it through a javascript function like "showOverlay()" ??

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  • Is there some way to access Sql server from z/OS mainframe and have the result in IBM 3270 terminal

    - by systempuntoout
    I tagged this question "impossible" because after a lot of googling, i have not find any trace\reference to a possible answer. I'm asking if there is some way\dirtytrick (possibly cheap) to access Microsoft Sql Server from z/OS mainframe (COBOL programs) and have the result in 3270 terminal emulation; i know that 3270 is a pretty old system, but in bank CED, is still very popular.

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  • What the difference between a namespace and a module in F#?

    - by Dave Berk
    I've just started learning F# (with little prior experience with .NET) so forgive me for what is probably a very simple question: What the difference between a namespace and a module in F#? Thanks Dave Edit: Thanks for the answer Brian. That's what I wanted to know. Just a clarification: can you also open a namespace as well (similar to C# using statement)?

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