timeline

Constrained d3.js Force display

由 不羁的心 提交于 2019-12-19 02:28:12
问题 I'd like to do something a little bit out of the ordinary with force layouts (for visualizing graphs). Constellations and all are fun to look at, but for timeseries data, it's not that helpful. I'd like to be able to constrain the layout by some axis, for example, by laying out the nodes according to the time they appear in a dataset, while still retaining the "bouncyness" of the visualization. Is this possible using d3? 回答1: To elaborate on my comment, yes, this is perfectly possible. The

现代IM系统中的消息系统架构 - 架构篇

由 怎甘沉沦 提交于 2019-12-18 14:13:31
前言 IM全称是『Instant Messaging』，中文名是即时通讯。在这个高度信息化的移动互联网时代，生活中IM类产品已经成为必备品，比较有名的如钉钉、微信、QQ等以IM为核心功能的产品。当然目前微信已经成长为一个生态型产品，但其核心功能还是IM。还有一些非以IM系统为核心的应用，最典型的如一些在线游戏、社交应用，IM也是其重要的功能模块。可以说，IM系统已经是任何一个带有社交属性的应用需要具备的基础功能，网络上对于这类系统的设计与实现的讨论也越来越多。 IM系统在互联网初期即存在，其基础技术架构在这十几年的发展中更新迭代多次，从早期的CS、P2P架构，到现在后台已经演变为一个复杂的分布式系统，涉及移动端、网络通信、协议、安全、存储和搜索等技术的方方面面。IM系统中最核心的部分是消息系统，消息系统中最核心的功能是消息的同步、存储和检索： 消息的同步：将消息完整的、快速的从发送方传递到接收方，就是消息的同步。消息同步系统最重要的衡量指标就是消息传递的实时性、完整性以及能支撑的消息规模。从功能上来说，一般至少要支持在线和离线推送，高级的IM系统还支持『多端同步』。 消息的存储：消息存储即消息的持久化保存，传统消息系统通常只能支持消息在接收端的本地存储，数据基本不具备可靠性。现代消息系统能支持消息在服务端的在线存储，功能上对应的就是『消息漫游』

Alternative to SIMILE Timeline for timeline visualization? [closed]

由 狂风中的少年 提交于 2019-12-18 09:54:24
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . So I have been having lots of fun playing with SIMILE Timeline, but unfortunately, it appears to be all but abandoned (most recently closed ticket May 2009) and riddled with memory leaks, especially when you are dynamically loading and unloading events (which is especially true in my case). I am a novice in

How to make the ball bounce off the walls in JavaFX?

由 ぃ、小莉子 提交于 2019-12-17 19:52:14
问题 I am new to Javafx and I am creating a simple program. What I'm trying to achieve is get the ball to bounce off the walls, but I haven't figured out how to do that yet. Also, feel free to leave other suggestions about my code. Here's the source code: public class GamePractice extends Application { public static Circle circle; public static Pane canvas; private long counter = 0; @Override public void start(Stage primaryStage) { canvas = new Pane(); Scene scene = new Scene(canvas, 800, 600);

Matplotlib timelines

由 三世轮回 提交于 2019-12-17 18:56:35
问题 I'm looking to take a python DataFrame with a bunch of timelines in it and plot these in a single figure. The DataFrame indices are Timestamps and there's a specific column, we'll call "sequence", that contains strings like "A" and "B". So the DataFrame looks something like this: +--------------------------+---+ | 2014-07-01 00:01:00.0000 | A | +--------------------------+---+ | 2014-07-01 00:02:00.0000 | B | +--------------------------+---+ | 2014-07-01 00:04:00.0000 | A | +-----------------

How to view file history in Git?

由 走远了吗. 提交于 2019-12-17 17:23:56
问题 With Subversion I could use TortoiseSVN to view the history/log of a file. How can I do this with Git? Just looking for history record for a particular file, and then the ability to compare the different versions. 回答1: Use git log to view the commit history. Each commit has an associated revision specifier that is a hash key (e.g. 14b8d0982044b0c49f7a855e396206ee65c0e787 and b410ad4619d296f9d37f0db3d0ff5b9066838b39 ). To view the difference between two different commits, use git diff with the

How to view file history in Git?

由 假如想象 提交于 2019-12-17 17:22:17
问题 With Subversion I could use TortoiseSVN to view the history/log of a file. How can I do this with Git? Just looking for history record for a particular file, and then the ability to compare the different versions. 回答1: Use git log to view the commit history. Each commit has an associated revision specifier that is a hash key (e.g. 14b8d0982044b0c49f7a855e396206ee65c0e787 and b410ad4619d296f9d37f0db3d0ff5b9066838b39 ). To view the difference between two different commits, use git diff with the

PySide2/PyQt5练习：用QPainter绘制环形进度条

由 怎甘沉沦 提交于 2019-12-17 09:14:48
好久没写Python了，拿Qt来练习下Python。代码很简单，就是绘制一个环形的滚动条，带动画和渐变效果。动画使用的QTimeLine，渐变使用的QConicalGradient径向渐变。每次修改角度值时，就启动timeline，实现动画效果。 写的过程中遇到了两个问题，一是Qt径向渐变默认是逆时针的，解决办法是使用QPainter的setViewport把视口翻转一下；二是PyQt5无法把QRect隐式转换为QRectF，在PySide2中就可以，没办法，最后就用的QRectF，代码通用一点。 效果如下： 代码如下： import sys # 懒得一个一个的写 from PySide2.QtCore import * from PySide2.QtWidgets import * from PySide2.QtGui import * # 如果是pyqt5用下面的import #from PyQt5.QtCore import * #from PyQt5.QtWidgets import * #from PyQt5.QtGui import * class CircularProgress(QWidget): def __init__(self): super().__init__() # 记录角度 self.angle=90 # 这个是用于绘制的，angle才是真实的角度

How do I create a timeline chart in Excel?

由 杀马特。学长 韩版系。学妹 提交于 2019-12-13 12:09:38
问题 How do I create a timeline chat which visualizes peoples activities throughout a day in one graph? On the x-axis I plan to place the time. And the y-Axis would be the different persons. First, I thought of a simple stacked bar chart. However, the problem is that Excel would combine all the same activities to one item and don't visualize it on the timeline... I also can't do it by hand as I have several 1000 entries to visualize... I found this post on Stackoverflow, but there there is only

How to implement an android delivery tracker using android studio [closed]

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-13 11:28:49
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I want a similar progress bar tracker like shown in the pic below for an android delivery app. See this 回答1: Try Timeline-View In XML <com.github.vipulasri.timelineview.TimelineView android:id="@+id/time_marker" android:layout_width="wrap_content" android:layout_height="match_parent
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