label | 易学教程

R X-axis Date Labels using plot()

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问题 Using the plot() function in R, I'm trying to produce a scatterplot of points of the form (SaleDate,SalePrice) = (saldt,sapPr) from a time-series, cross-section real estate sales dataset in dataframe format. My problem concerns labels for the X-axis. Just about any series of annual labels would be adequate, e.g. 1999,2000,...,2013 or 1999-01-01,...,2013-01-01. What I'm getting now, a single label, 2000, at what appears to be the proper location won't work. The following is my call to plot() :

How can I print to a label printer from a web page

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问题 I have an e-commerce web application and I'd some how like to make that print to a label printer for the back end stuff I have two questions 1) I can't print from a normal webpage straight to the printer (A zedbra LP2844 i think) it just throws out junk 2) I want to be able to print labels to the label printer, but all other printing, such as invoices would go to the default printer - a laser, so need someway of selecting the right printer It will all happen at a fixed location, so I can

METAPOST: using loop variables in labels

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问题 Dear stackoverflowers, recently, while playing around with the METAPOST enviroment, I encountered a problem. While drawing something using the loop 'for' macro I needed the value of the loop variable to be correctly displayed inside a label, however I could not figure out how to do that and Mr.Google was unable to help me. Below is an example of the code I used: for i=1 upto N: label(btex $here should be the value of i$, some_position); endfor; Any kind of help will be appreaciated :] 回答1: at

jQuery快速入门

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一、jQuery介绍 jQuery是一个轻量级的、兼容多浏览器的JavaScript库。 jQuery使用户能够更方便地处理HTML Document、Events、实现动画效果、方便地进行Ajax交互，能够极大地简化JavaScript编程。它的宗旨就是：“Write less, do more.“ 二、jQuery的优势一款轻量级的JS框架。jQuery核心js文件才几十kb，不会影响页面加载速度。丰富的DOM选择器,jQuery的选择器用起来很方便，比如要找到某个DOM对象的相邻元素，JS可能要写好几行代码，而jQuery一行代码就搞定了，再比如要将一个表格的隔行变色，jQuery也是一行代码搞定。链式表达式。jQuery的链式操作可以把多个操作写在一行代码里，更加简洁。事件、样式、动画支持。jQuery还简化了js操作css的代码，并且代码的可读性也比js要强。 Ajax操作支持。jQuery简化了AJAX操作，后端只需返回一个JSON格式的字符串就能完成与前端的通信。跨浏览器兼容。jQuery基本兼容了现在主流的浏览器，不用再为浏览器的兼容问题而伤透脑筋。插件扩展开发。jQuery有着丰富的第三方的插件，例如：树形菜单、日期控件、图片切换插件、弹出窗口等等基本前端页面上的组件都有对应插件，并且用jQuery插件做出来的效果很炫

How to redirecting “stdout” to a Label widget?

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问题 I am trying to redirect stdout to a Label widget. The goal is to "print" into the Label all the Python prints that are in my script. But when I click on BUTTON1 nothing happens... Here is my code: from Tkinter import * import sys import tkMessageBox class App: def __init__(self, master): self.frame = Frame(master, borderwidth=5, relief=RIDGE) self.frame.grid() class IORedirector(object): def __init__(self,TEXT_INFO): self.TEXT_INFO = TEXT_INFO class StdoutRedirector(IORedirector): def write

Select Label by Input type

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问题 Is there a way to exclude or select Label by input types, something similar to input field? label:not([type=checkbox]) label[type=checkbox] 回答1: If you give your checkboxes specific id's that all start with the same thing, you could do the following: HTML <input type="checkbox" id="chkTerms" /> <label for="chkTerms">Read terms & conditions</label> CSS label[for*="chk"], label[htmlfor*="chk"] { css here } Probably modern browsers only though. EDIT: I have just tried a fiddle: link and it works

How do I generate (and label) a random integer with python 3.2?

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问题 Okay, so I'm admittedly a newbie to programming, but I can't determine how to get python v3.2 to generate a random positive integer between parameters I've given it. Just so you can understand the context, I'm trying to create a guessing-game where the user inputs parameters (say 1 to 50), and the computer generates a random number between the given numbers. The user would then have to guess the value that the computer has chosen. I've searched long and hard, but all of the solutions I can

Underline Label in WPF, using styles

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问题 I have the following style: <Style x:Key="ActionLabelStyle" TargetType="{x:Type Label}"> <Setter Property="Margin" Value="10,3" /> <Setter Property="Padding" Value="0" /> <Setter Property="TextBlock.TextWrapping" Value="Wrap" /> <Setter Property="FontFamily" Value="Calibri" /> <Style.Triggers> <MultiTrigger> <MultiTrigger.Conditions> <Condition Property="IsMouseOver" Value="True" /> <Condition Property="IsEnabled" Value="True" /> </MultiTrigger.Conditions> <Setter Property="Background" Value=

Underline Label in WPF, using styles

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Is it good practice to use <label> for non-input/non-interactive elements?

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问题 When labeling a non-input element with no interactivity, such as a preview <img> , is it better (or correct) to use <span> instead of <label> ? e.g.: <span>Image preview:</span> <img id="preview"> or this: <label for="preview">Image preview:</label> <img id="preview"> 回答1: The <label> tag defines a label for an <input> element. So use <span> instead. The for attribute associates the label with a control element, as defined in the description of label in the HTML 4.01 spec. This implies, among