Comments for Quantitative thoughts http://www.investuotojas.eu Tue, 17 Aug 2010 15:31:37 +0000 http://wordpress.org/?v=2.9.2 hourly 1 Comment on Strategy: what if SPY & VIX are up? by kafka http://www.investuotojas.eu/?p=323&cpage=1#comment-2688 kafka Tue, 17 Aug 2010 15:31:37 +0000 http://www.investuotojas.eu/?p=323#comment-2688 True, when you have a pair, but in this case I tried to map 3 variables: SPY(T0), SPY(T1) & VIX. True, when you have a pair, but in this case I tried to map 3 variables: SPY(T0), SPY(T1) & VIX.

]]> Comment on Strategy: what if SPY & VIX are up? by leulius http://www.investuotojas.eu/?p=323&cpage=1#comment-2683 leulius Tue, 17 Aug 2010 11:30:03 +0000 http://www.investuotojas.eu/?p=323#comment-2683 If you searching for linear relationships between pairs of variables, isn't it better to look at simple scatterplots? With some non-parametric curve fitting? If you searching for linear relationships between pairs of variables, isn’t it better to look at simple scatterplots? With some non-parametric curve fitting?

]]> Comment on Prezentacija by Vytautas http://www.investuotojas.eu/?p=381&cpage=1#comment-2549 Vytautas Wed, 11 Aug 2010 19:26:09 +0000 http://www.investuotojas.eu/?p=381#comment-2549 Labai ačiū! Kokybiškiausia investuotoju asociacijos organizuota prezentacija šiais metais. Labai ačiū! Kokybiškiausia investuotoju asociacijos organizuota prezentacija šiais metais.

]]> Comment on Prezentacijos nuotraukos by Pirštas http://www.investuotojas.eu/?p=384&cpage=1#comment-2458 Pirštas Sat, 07 Aug 2010 17:37:01 +0000 http://www.investuotojas.eu/?p=384#comment-2458 Heh! +1 oratoriui ;) Heh! +1 oratoriui ;)

]]> Comment on Prezentacija by Vaidas http://www.investuotojas.eu/?p=381&cpage=1#comment-2425 Vaidas Thu, 05 Aug 2010 20:37:56 +0000 http://www.investuotojas.eu/?p=381#comment-2425 Ačiū už prezentaciją. Buvo įdomu + naudinga. Ačiū už prezentaciją. Buvo įdomu + naudinga.

]]> Comment on Kai būsiu Vilniuje… by Quantitative thoughts » Prezentacija http://www.investuotojas.eu/?p=376&cpage=1#comment-2423 Quantitative thoughts » Prezentacija Thu, 05 Aug 2010 18:41:54 +0000 http://www.investuotojas.eu/?p=376#comment-2423 [...] Ačiū visiems dalyvavusiems pristatyme! [...] [...] Ačiū visiems dalyvavusiems pristatyme! [...]

]]> Comment on Kai būsiu Vilniuje… by Vytautas http://www.investuotojas.eu/?p=376&cpage=1#comment-2133 Vytautas Sun, 18 Jul 2010 18:13:16 +0000 http://www.investuotojas.eu/?p=376#comment-2133 Bus labai įdomu paklausyti šią paskaitą:) Laukiame Lietivoje! Bus labai įdomu paklausyti šią paskaitą:) Laukiame Lietivoje!

]]> Comment on Contact me by Quantitative thoughts » Kai būsiu Vilniuje… http://www.investuotojas.eu/?page_id=240&cpage=1#comment-2058 Quantitative thoughts » Kai būsiu Vilniuje… Wed, 14 Jul 2010 21:21:10 +0000 http://www.investuotojas.eu/?page_id=240#comment-2058 [...] pristatymą apie kiekybinius finansus (quantitative finance). Jei norite sudalyvauti, galite parašyti man arba kreiptis tiesiai į Investuotojų [...] [...] pristatymą apie kiekybinius finansus (quantitative finance). Jei norite sudalyvauti, galite parašyti man arba kreiptis tiesiai į Investuotojų [...]

]]> Comment on Gas price seasonality by Mike Caron http://www.investuotojas.eu/?p=311&cpage=1#comment-1781 Mike Caron Sat, 17 Apr 2010 01:11:24 +0000 http://www.investuotojas.eu/?p=311#comment-1781 I just found my problem. I had some blank data in the data set. By using tmp<-na.omit(tmp), I was able to omit that null data. I also had my string data being converted to a factor, so I had to type the string data so I ended up with gas<-as.xts(as.double(as.character(tmp[,9])),order.by=as.POSIXct(tmp[,12])) . That now allows me to plot. I just found my problem. I had some blank data in the data set. By using tmp<-na.omit(tmp), I was able to omit that null data. I also had my string data being converted to a factor, so I had to type the string data so I ended up with gas<-as.xts(as.double(as.character(tmp[,9])),order.by=as.POSIXct(tmp[,12])) . That now allows me to plot.

]]> Comment on Gas price seasonality by kafka http://www.investuotojas.eu/?p=311&cpage=1#comment-1777 kafka Fri, 16 Apr 2010 08:11:55 +0000 http://www.investuotojas.eu/?p=311#comment-1777 Did you manage to fix your problem? In case, if you didn't - check what do you have in tmp object after each step. That way you will spot the problem. Error in periodicity(x) : can not calculate periodicity of 1 observation - this means, that object has only one value and an array is expected. Did you manage to fix your problem?
In case, if you didn’t – check what do you have in tmp object after each step. That way you will spot the problem.

Error in periodicity(x) : can not calculate periodicity of 1 observation – this means, that object has only one value and an array is expected.

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