Python library for dealing with time associated data? -


i've got data (noaa-provided weather forecasts) i'm trying work with. there various data series (temperature, humidity, etc), each of contains series of data points, , indexes array of datetimes, on various time scales (some series hourly, others 3-hourly, daily). there sort of library dealing data this, , accessing in user-friendly way. ideal usage like:

db = timedata()  db.set_val('2010-12-01 12:00','temp',34)  db.set_val('2010-12-01 15:00','temp',37)  db.set_val('2010-12-01 12:00','wind',5)  db.set_val('2010-12-01 13:00','wind',6)  db.query('2010-12-01 13:00') # {'wind':6, 'temp':34}

basically query return recent value of each series. looked @ scikits.timeseries, isn't amenable use case, due amount of pre-computation involved (it expects data in 1 shot, no random-access setting).

if data sorted can use bisect module entry greatest time less or equal specified time.

something like:

i = bisect_right(times, time) # times[j] <= time j<i # times[j] > time j>=i if times[i-1] == time:       # exact match       value = values[i-1] else:       # interpolate       value = (values[i-1]+values[i])/2

Comments

Post a Comment

Popular posts from this blog

asp.net - repeatedly call AddImageUrl(url) to assemble pdf document -

i'm using abcpdf , i'm curious if can recursively call addimageurl() function assemble pdf document compile multiple urls? something like: int pagecount = 0; int theid = thedoc.addimageurl("http://stackoverflow.com/search?q=abcpdf+footer+page+x+out+of+", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetochain(theid); } pagecount = thedoc.pagecount; console.writeline("1 document page count:" + pagecount); //flatten document (int = 1; <= pagecount; i++) { thedoc.pagenumber = i; thedoc.flatten(); } //now try again theid = thedoc.addimageurl("http://stackoverflow.com/questions/1980890/pdf-report-generation", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetoc...
Read more

java - Android recognize cell phone with keyboard or not? -

in android app, want detect user's device if device has keyboard(like motorola milestone) , show corresponding user interface. guys know how that? ! regards justicepenny http://developer.android.com/reference/android/content/res/configuration.html public int keyboard the kind of keyboard attached device. 1 of: keyboard_nokeys, keyboard_qwerty, keyboard_12key. that's it!
Read more

iphone - How would you achieve a LED Scrolling effect? -

how achieve led scrolling effect example below? led sign - led ticker emulator iphone , ipad http://img.skitch.com/20101201-rsfh4p1bajb1wp94k466pdpiuj.preview.jpg sometimes remunerates comment in other posts :) have put code you, should implement font '8pin matrix' realistic feeling. uilabel *label; - (void)viewdidload { [super viewdidload]; label = [[uilabel alloc]initwithframe:cgrectmake(10, 50, 300, 20)]; label.font = [uifont fontwithname:@"courier-bold" size:16.0]; label.backgroundcolor = [uicolor blackcolor]; label.textcolor = [uicolor greencolor]; label.linebreakmode = uilinebreakmodecharacterwrap; // otherwise "…" label.text = @"this led text scrolled "; // blanks space between [self.view addsubview:label]; [nstimer scheduledtimerwithtimeinterval:0.12f target:self selector:@selector(scrolllabel) use...
Read more