design patterns - Using PatternSequence with Cases in Mathematica to find peaks -

-

निर्देशांक के जोड़ जोड़े 

  डेटा = {{1, 0}, {2, 0}, {3, 1}, {4, 2}, {5, 1}, {6, 2}, {7, 3}, {8, 4}, {9, 3}, {10, 2} }   
 मैं चोटियों और घाटियों को निकालना चाहता हूं, इस प्रकार:  
  {{4, 2}, {5, 1}, {8, 4}}   
 मेरा वर्तमान समाधान यह अनावश्यकता है:  
  मामले [विभाजन [डेटा, 3, 1], {{ta_, a_}, { Tb_, b_}, {टीसी_, सी_}} /; या [एक & lt; बी & gt; सी, ए & gt; बी एंड एलटी; सी]: & gt; {टीबी, बी}]   
 जो आप देख सकते हैं  विभाजन  का उपयोग कर डेटा सेट के आकार को तीन गुणा करके शुरू होता है। मुझे लगता है कि यह जानकारी निकालने के लिए  मामले  और  patternequence  का उपयोग करना संभव है, लेकिन यह प्रयास काम नहीं करता है:  
  मामले [डेटा, ({___, पैंट स्यूवेन्स [{_, a_}, {t_, b_}, {_, c_}], ___} / या [एक और लि <बी & gt; सी, ए & gt; बी & lt; c]): & gt ; {टी, बी}]   
 यह पैदावार  {} ।  
 मुझे लगता है कि पैटर्न के साथ कुछ भी गलत नहीं है क्योंकि यह काम करता है  प्रतिस्थापन सभी  के साथ:  
  डेटा / ({___, पैंट स्यूवेन्स [{_, a_}, {t_, b_}, {_, c_}], ___} / या [एक और लि <बी & gt; सी, ए & gt; बी & lt; c]): & gt ; {टी, बी}   
 यह सही पहला शिखर देता है,  {4, 2} । यहां पर क्या हो रहा है?   
 
 
 आपका असफल प्रयास क्यों नहीं करता है इसका एक कारण यह है कि  मामले  डिफ़ॉल्ट रूप से आपके अभिव्यक्ति के स्तर 1 पर मिलानों के लिए दिखता है चूंकि आप स्तर 0 पर मिलान चाहते हैं, इसलिए आपको  
  मामलों [डेटा, {___, {_, a_}, {t_, b_}, {_, c_} जैसे कुछ करने की आवश्यकता होगी, ___} /; या [एक & lt; बी & gt; सी, ए & gt; बी एंड एलटी; सी]: & gt; {टी, बी}, {0}]   
 हालांकि, यह केवल एक समाधान के रूप में  {4,2}  देता है, इसलिए यह अभी भी नहीं है जो आप देख रहे हैं के लिये। विभाजन के बिना सभी मैचों को खोजने के लिए आप ऐसा कुछ कर सकते हैं  
  बदलें [डेटा, ({___, {_, a_}, {t_, b_}, {_, c_}, ___} / ; या [a & lt; b & gt; c, a & gt; बी & lt; c]): & gt; {टी, बी}]   
 जो देता है  
  {{4, 2}, {5, 1}, {8, 4}}

Comments

Post a Comment

Popular posts from this blog

php - Creating canonical URLs with custom route-classes -

-
I am trying to implement the canonical url and to combine with custom route classes. URL-SACAME is something like this: / category-x / article / 123 / category-y / article / 123 I am creating a custom route - the expansion of the class Zend_Controller_Router_Route_Regex and checks that the article is 123 and the correct category-name is included in the URL. If the article is in 123 square-X and the user is reaching square-y, then I want to redirect to the correct URL. But there is no clear possibility to do this directly to the roads. What is the best practice approach here? I often do this in my action controller like something ... // Get / Category-Y / Article / 123 $ $ article- & gt; URL is generated, and it contains / category-x / article / 123 if (this-> --request-> getRequestUri ()! = $ Article-> URL) {return $ this- & gt; ; _helper-> Redirector-> GoToUrl ($ paragraph-> url); } In this example, $ article-> The url will need ...
Read more

mysql - Formatting problem with PHP DateTime Difference when used as part of an equation -

-
I am trying to write a simple invoicing system. I want to use the Datetime Diff to calculate the cost of each invoice. I have so far: / * In this example $ dayLength and $ ratePerSec is not really the case, but now we use the hypotethical values ​​of 8.0 and 0.0054 Will * / $ date1 = new date time ("Time 1 Form Database", [DateTimeJonof Chase]); $ Date2 = new date time ("Time 2 Form Database", [Datetime Joneof Choice]); $ Diff = $ date2- & gt; Diff ($ date1); $ LenInSec = $ diff- & gt; Format ("% y") * 365 * $ dayLength * 3600 + $ diff- & gt; Format ("% d") * $ dayLength * 3600 + $ diff- & gt; Format ("% H") * 3600 + $ diff- & gt; Format ("% i") * 60 + $ diff- & gt; Format ("% s"); $ Cost = $ lenInSec * $ rate per second; When I try to output cost using $ lenInSec generated from the Deltaime Diff, I actually get weird results. Occasionally, in 1 and 3 out of 1 to 3 times, I get the...
Read more

Mysql Local server hardware -

-
In anticipation of a live scenario, I am creating my entire site, which has a 500 MHz processor with 256 MB A very large 100 MHz RAM I have loaded my database with 200k + rows of garbage data, trying to test my queries. I have seen - obviously because of this, a large display hit all my FAQ using the index, although some 15+ to join (using all indexes) using MySQL To enable 16MB cache, which brings down the query times to nothing but what results? With a dynamic website, I can not see how the cache can help completely when I allow unique queries such as a search feature. I am also using the eaccelerator for PHP. When I use the COUNT (*) total with multiple code JOIN and WHERE , then 10 + There are other queries. Other queries that only get the same line or two do at the same level when I had only a few lines I also noticed that almost 99% of the CPU in CPU CPU stress during a query Comes. Basically I do not know whether the software is on the fault or too much of the h...
Read more