individual users, online interactive charting interface Highcharts Cloud, commercial use requires purchase authorization.Agreement: non-commercial use is free and commercial use is paid.7. FlotFlot is one of the oldest chart libraries, and revolves around usage simplicity and focusing on interactive features. It is a specific jquery library, which means that you need to use it to familiarize yourself with the underlying jquery. But on the other hand, this means you have full control over presen
How can I modify the classic Cartesian product code? Cartesian product code: lt ;? PHPfunctionDescartes () { nbsp; $ t = func_get_args (); nbsp; if (func_num_args () = classic Cartesian product code, how can I modify it?
Cartesian product code:
Function Descartes (){
$ T = func_get_args ();
If (func_num_args () = 1) return call_user_func_array (_ FUNCTION __, $ t [0]);
$ A = array_shift ($ t );
If (! Is_array ($ a) $ a = array ($ );
$ A = array_chunk ($ a, 1 );
Do {
$ R = array ();
$ B = ar
principle:Several check codes are added to the data, and each bits of the data is assigned to several parity groups.Set: The number of check bits is R, can represent 2^r information, one means "no error", 2^r-1 to indicate the error occurred in which one.k= 2^r–1-r information can be used to correct a data bit.2^r≥k+r+1To detect and correct a single error, while discovering two errors, the R,k should meet the following relationships: 2^r-1≥k+r (see table 3.8)How the check bit and data bits are a
, the composition of the code is: the data bits inserted between the K check digit, by expanding the distance to the time to check and error correction. For example: for 8-bit data, 4 check bits are required for verification. For example, make data bits: D7, D6, D5, D4, D3, D2, D1, D0, and check bit: P4, P3, P2, P1. Then encode the location:H12 H11 H10 H9 H8 H7 H6 H5 H4 H3 H2 H1D7 D6 D5 D4 P4 D3 D2 D1 P3 D0
verified. The verification relationships of each horizontal bar are as follows:
D1 + D2 + D3 +... + Dn-1 = P1
Dx = P1-D1-D2-D3-...-Dn-1 (D sequence exclusive Dx)
That is: Dx = P1 + D1 + D2 + D3 +... + Dn-1 (D sequence excludes Dx)
Multiple redundancy Models]
The preceding single redundancy only supports the absence of one storage member. In practice, higher red
Winmail the installation and use of the mail server messaging system.Before installing, first configure the server fixed IP address, subnet mask, and DNS Server (gateway I do not need here temporarily).Configure IP address information First, so that the two virtual machines can be interconnected. The following is the configuration above server servers.650) this.width=650; "title=" Picture 1.png "style=" Float:none; "alt=" wkiom1ukuwfb2inxaamlyt3774a089.jpg "src=" http:/ S3.51cto.com/wyfs02/m02/
Source: http://www.sitepoint.com/15-best-javascript-charting-libraries/We can't imagine what a dashboard would look like without a chart. Charts can be visually and effectively displayed on the data. Not only that, the clever application of the chart can also improve the overall visual effect of the website.This article will cover some of the most useful JavaScript libraries for making charts. These libraries can help you complete the beautiful, customizable diagrams and tables in your future pr
Architecture-learning of interruption shielding
When learning the architecture of the system, there are two points that I have never understood. One is floating point processing, the other is shielding interruption, and the floating point processing is not understood so far. The shielding interruption is somewhat enlightened.
Shielding code: the shielding code between 1 and 0 is different from that between 0 and 0.
Interrupted instance:
1. All interruptions arrive at the same time:
1. Examples
Failure phenomena:Data Guard archive Gap, the tragedy is that the lost archive on the Main library was deleted by Rman Backup, the lost archive about 20, the database size of about 2T, if the Rebuild DG will be very time-consuming, so decided to use incremental backup to recover the DG, the main steps are as follows:1. Backup Repository spfile filesql> create pfile= '/home/ora/pfilerdg.ora ' from SPFile;2. View current standby SCNSql> Select To_char (CURRENT_SCN) from V$database;To_char (CURRENT
We know that the general routine of D3 is D3.selectall (' Path.mypath '). Data (Yourdataset). Enter (). Append (' path '). attr (' class ', ' MyPath '). attr ( ' d ', thepathstring)The acquisition of Thepathstring is usually generated based on the binding yourdataset. The specific generation methods are:1. Through the program itself section to piece together the D property of path, for example in D3V4 becau
triggers an event when the mouse is hovering over the event. By default, the time is accompanied by a URL hyperlink. You can click to link to the details page.6. Full Calendar
FullCalendar is a jQuery plug-in that provides a complete, drag-and-drop calendar, just like a calendar. It uses AJAX to obtain the dynamic I of monthly events, and it is easy to configure the Calendar in your favorite format (Extended feature provided by Google Calendar ). You can customize the appearance and behavior a
Create your own Data Map
In the next three sections, we will introduce three methods for creating color-filled data maps. These three methods have their own technical characteristics and performance, and can be applied to different analysis scenarios.
Typical practices of filename coloring
The most common form of Data Map is the fill-color thermal map (heatmap ). As there is no authoritative translation name in China, this book translates
hundred thousand. Of course I'm not talking about any futuristic technology .)
Think of it as InternetHeatmap.
We only care about what our opponents are handling or what our friends and colleagues are interested in.
Once we have a heat map that shows the content I'm interested in, we can find the content that I'm most interested in andThe hottest.
Things that I care about (such as new trends, new sites, and new contacts) will get hotter and will get colder as time passes.Similarly, those pages
quantity
B
12.Use gplot package
Install. packages ("gplots") Library (gplots) boxplot. N (metals [,-1], border = "white", Col = "black", boxwex = 0.3, medlwd = 1, whiskcol = "black ", staplecol = "black", outcol = "red", cex = 0.3, outpch = 19, main = "Summary of metal concentrations by site") # boxplot. N function box plot is similar to boxplot function box plot
13.Split data
Cuts
For split data, see:
Http://blog.csdn.net/zhuanzhu123/article/details/9343639
14. F
libraries, Ajax, JSON, Dom, and object-oriented JavaScript are the gold mines that really deserve your bookmarks.Click to access: http://microjs.com/ Diva. js
Diva is a tool library used to browse documents online. It is designed to provide page-by-page reading for multi-page documents in digital libraries. This is a very useful tool for online library or online bookstore website customer experience. Here is an example.Click to visit: http://ddmal.music.mcgill.ca/diva/ Bookmarklet Generator
As
page that links to details.6. Full Calendar
Fullcalendar is a jquery plug-in that provides a full size, drag-and-drop calendar, just like the one above. It uses AJAX to get the dynamic I of the monthly events, and it's easy to configure the calendar (the extended functionality provided by Google Calendar) in a format that you like. The user can customize its appearance, customize the behavior after triggering events (e.g., click, drag and drop events, etc.).7. Cal-
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