r - rbind + setkey in data.table slower than xts::rbind which automatically indexes? -

-

data.table xts से लगभग 6x धीमी होने का कारण क्या है < कोड> अद्यतन करते समय (= आरबीआईडी) नई पंक्तियाँ? 

  लाइब्रेरी (quantmod); पुस्तकालय (XTS); पुस्तकालय (डेटा योग्य) XTS = getSymbols ("AAPL", से = "2000-01-01", env = NULL) # संबंधित `data.table`: डीटी & lt; - as.data.table (as.data) (डीटी, सी ("दिनांक", नाम (एक्सटीएस)) # नोट: प्रत्येक परीक्षण चलाने से पहले उपर्युक्त पुन: चलाएं। System.time (1:10 में मैं) एक्सटीएस = आरबीआईडीआईएनएस (एक्सटीएस, एक्सटीएस)) # रीइंडएक्सिंग स्वचालित # यूजर सिस्टम बीत चुका है # 0.15 0.03 0.47 सिस्टम.टाइम (के लिए (i 1:10 में) डीटी = सेटकी (आरबीआईडी) (डीटी, डीटी), दिनांक)) # मैन्युअल रूप से कुंजी # यूज़र सिस्टम रीसेट करने की जरूरत है # 0.64 0.02 2.30 सिस्टम.टाइम (के लिए 1:10 में) डीटी = सेटकी (आरबीआईडलिस्ट (सूची (डीटी, डीटी)), दिनांक )) # डीटीओ # यूजर सिस्टम बीत चुका है # 0.60 0.02 2.20   
  डेटा योग्य  (xts के विपरीत) मेरे कंप्यूटर पर आई & gt; 15 के लिए मेमोरी आवंटन भी निकालेगा ।  
 सामान्य प्रोग्रामिंग उपयोग का मामला तब होता है जब आप अस्थायी सिमुलेशन चला रहे हों और परिणाम तालिका में मध्यवर्ती माप एकत्र करना चाहते हैं, जिसे आप बाद में संक्षेप में करना चाहते हैं।   
 
 
 कोशिश करें  
  rbindlist (प्रतिनिधि (सूची (डीटी), 10))   < P>  rbindlist  को आपके रनटाइम को काफी बढ़ावा देना चाहिए।

Comments

Post a Comment

Popular posts from this blog

java - ImportError: No module named py4j.java_gateway -

-
I'm trying to call the Python using the Java program py4j . I've been installing the plug-in Eclipse and test name Piidvi project. I'm trying to execute the following part of the code found on py4j webpage: Import from py4j.java_gateway to JavaGateway, java_import gateway = JavaGateway () jvm = gateway.jvm java_import (jvm, '' Org.eclipse Kkorkrisorsej. * ") Vrkspes_rut = Jvankresourkesplginkgetvrkspas (). GetRoot (Gateway .help (workspace_root, '* Projects *') project_names = [project.getName () (for projects workpace_root.getProjects))] print (Projekt_nam) But I There is an error in import. I have checked that the P4JJ is present in the Jar Eclipse plugin directory. Can anyone help please? I had to install the py4j application
Read more

python - Receiving "KeyError" after decoding json result from url -

-
I am new to Python I am trying to parse JSON result from a URL. Basically, I was using the following: response = urllib.request.urlopen (url) json_obj = json.load (response) It should be a stroke "str 'not' bytes' in the lines of a given" JSON object, so after searching on the StackoverView Flo, I decode the response in this way: F = urllib.request.urlopen (Url) charset = f.info (). Get_param ('charset', 'utf8') data = f.read () decoded = json.loads (data.decode (charset)) If I print "decode" I is as follows: { 'link': { 'summary data': 'https: // localhost / piwebapi / streams / p0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTExNQU42NDIwXFNJTlVTT0lE / summary' 'value': 'https: // localhost / Piwebapi / streams / P0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTExNQU42NDIwXFNJTlVTT0lE / price ',' InterpolatedData ':' https: // localhost / Piwebapi / streams / P0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTE...
Read more

.net - Creating a new Queue Manager and Queue in Websphere MQ (using C#) -

-
"itemprop =" text "> I am writing applications that use WebSphere MQ to send messages. My unittests (for flow), I want to verify that I have put the correct message on the response queue. I am trying to figure out how to do this. My main obstacle is that I think it might be scary to clear the queue before running in my queue because the same queue can be used by other applications, I thought a decent solution would be a new line The manager will remove the queue for my solidarity and after using it. So my question is: Is it possible to use C # by using queue manager and queue? After the For future reference and future people, who want to make queues. I thought how to make and remove IBM MQ QE (not quenhers) with PCM messaging. It is not very simple, but it can be done. We have implemented it in a library and it is being used to create and delete commands before and after integration tests. The most important part of the code in this library is shown in the...
Read more