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r - Plotting with ggplot2: "Error: Discrete value supplied to continuous scale" on categorical y-axis

The plotting code below gives Error: Discrete value supplied to continuous scale What's wrong with this code? ... looked before adding scale: See Question&Answers more detail:os...

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.net - How do I parse and convert DateTime’s to the RFC 822 date-time format?

How do I convert a DateTime structure to its equivalent RFC 822 date-time formatted string representation and ... the RSS Syndication Format. See Question&Answers more detail:os...

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python - Use Distance Matrix in scipy.cluster.hierarchy.linkage()?

I have a distance matrix n*n M where M_ij is the distance between object_i and object_j. So as expected, it ... how this issue is dealt with. See Question&Answers more detail:os...

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eclipse - Ivy fails to resolve a dependency, unable to find cause

While using ivy:retrieve, it fails to resolve the dependency that should be downloaded. The output looks like this: ... > </javadoc> </target> See Question&Answers more detail:os...

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c# - How to make ObservableCollection thread-safe?

System.InvalidOperationException: Collection was modified; enumeration operation may not execute. I am adding/removing from an ... me on this? See Question&Answers more detail:os...

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mongodb - Problems to run examples in Meteor

I'm testing Meteor examples and this is what I see when I run meteor in todos examples: Unexpected mongo ... port 28017 Someone helps? Thanks! See Question&Answers more detail:os...

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internet explorer 9 - css3 text-shadow in IE9

Is there an easy way to have css3 text-shadow's working in IE9? At least a single text shadow would be ... element and implements it for IE9. See Question&Answers more detail:os...

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Programmatically showing a View from an Eclipse Plug-in

I have a plug-in to an Eclipse RCP application that has a view. After an event occurs in the RCP ... have not found out how anywhere. See Question&Answers more detail:os...

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r - Create a Data Frame of Unequal Lengths

While data frame columns must have the same number rows, is there any way to create a data frame of unequal lengths. I'm ... ",5), rep("",5))) See Question&Answers more detail:os...

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reflection - Java seek a method with specific annotation and its annotation element

Suppose I have this annotation class @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.METHOD) public @interface MethodXY ... it? Thanks See Question&Answers more detail:os...

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c# - Moq: unit testing a method relying on HttpContext

Consider a method in a .NET assembly: public static string GetSecurityContextUserName() { //extract the username ... this code/architecture? See Question&Answers more detail:os...

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android - Disable or prevent multitouch in Activity

I have several Views on an Activity which a user wants to touch quickly in succession and I capture these touches ... but neither seem to work. See Question&Answers more detail:os...

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c++ - Should a move constructor take a const or non-const rvalue reference?

In several places I've seen the recommended signatures of copy and move constructors given as: struct T { T ... returning things that are const? See Question&Answers more detail:os...

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sql - Query that ignore the spaces

What's the best way to run a query so that spaces in the fields are ignored? For example, the following queries ... I think this doesn't matter. See Question&Answers more detail:os...

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In Java, for a string x, what is the runtime cost of s.length()? Is it O(1) or O(n)?

I've been told that code such as: for (int i = 0; i < x.length(); i++) { // blah } is ... walk the whole string just to determine its length? See Question&Answers more detail:os...

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encoding - What charset does Microsoft Excel use when saving files?

I have a Java app which reads CSV files which have been created in Excel (e.g. 2007). Does anyone know ... using either of these charset types. See Question&Answers more detail:os...

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Detecting changes in a Javascript array using the Proxy object

It is relatively trivial to watch for changes in an array in Javascript. One method I use is like this: ... , anyone interested in elaborating? See Question&Answers more detail:os...

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algorithm - Polygon enclosing a set of points

I have a set S of points (2D : defined by x and y) and I want to find P, the smallest (meaning : ... is astonishing...) Thanks for your help See Question&Answers more detail:os...

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c# - Get chrome's console log

I want to build an automation testing, so I have to know the errors that appear in the console of chrome. there ... and then go to "console". See Question&Answers more detail:os...

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windows - While loop in batch

Here is what I want, inside the BACKUPDIR, I want to execute cscript /nologo c:deletefile.vbs %BACKUPDIR% ... /a countfiles-=%countfiles% ) See Question&Answers more detail:os...

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data binding - WPF Databind Before Saving

In my WPF application, I have a number of databound TextBoxes. The UpdateSourceTrigger for these bindings is LostFocus. The ... get; set; } } } See Question&Answers more detail:os...

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javascript - FB.logout() called without an access token

I'm trying to log out of a website i've created with Facebook integrated. Logging in works fine, but when I ... token, it'd be appreciated. See Question&Answers more detail:os...

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ios - How to send data back by popViewControllerAnimated for Swift?

I need to send some data back from secondView to First View by popView. How can i send back the data by popViewControllerAnimated? Thanks! See Question&Answers more detail:os...

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Communication between BroadcastReceiver and Activity - android

I have a broadcast receiver in my app which is fired every time the user gets an incoming call. Now, when ... (phoneCall, filter); } } See Question&Answers more detail:os...

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ASP.NET MVC - Custom validation message for value types

When I use UpdateModel or TryUpdateModel, the MVC framework is smart enough to know if you are trying to pass in a ... e.g. BirthDay = "Hello". See Question&Answers more detail:os...

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How to display an image from a path in asp.net MVC 4 and Razor view?

I have the following model: public class Player { public String ImagePath { get { return "~/Content/img/sql_error ... on how razor syntax works. See Question&Answers more detail:os...

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c# - With Rx, how do I ignore all-except-the-latest value when my Subscribe method is running

Using Reactive Extensions, I want to ignore messages coming from my event stream that occur while my Subscribe method ... to go about doing it? See Question&Answers more detail:os...

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jquery - JavaScript: Know when an image is fully loaded

If I have a beacon: <img src="http://example.com/beacon" /> I want a method to be called once the beacon ... Is it possible? Is it in jQuery? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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