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

Matlab: Transfer variable from GUI to Base Workspace and new Variables (Static Workspace, Script, Creating new Variables) -

-
I am developing a GUI for the current script, which expects some straight values ​​in the base workspace. The GUI will move users' values ​​to the base-workspace and then the script will start and close itself immediately. It sounds very easy and has values ​​that run with Essenin and Evelyn, but I work for days with the problem that if the script takes the values ​​of my post, then I get a message: Try to add var_name View MATLAB programming for static workspace details, see restrictions on assigning at variables. What's the problem? The GUI is closed and the script will use the base-workspace without restriction. How can this be done? The script is untouchable (not mine) and this base expects variables in the workspace, so the GUI is moving the value in the workspace and nothing else. A stable workspace is not required Workspaces will be free of any restrictions. To summarize: I want to delete "Static" in the "static workspace" Specifies the...
Read more