Question

当我调用periodReturns函数时，我从Xts包中收到以下错误。我已经从github升级了Quantmod和Xts包但仍然存在错误。任何人都可以建议如何解决这个问题？

谢谢，

getSymbols('AAPL', src = 'yahoo', from = '2016-01-01', auto.assign = T)

> periodReturn(AAPL,by=years,from='2003-01-01')
Error in lag.xts(x1, K.) : 
INTEGER() can only be applied to a 'integer', not a 'double'

> sessionInfo()
R version 3.4.0 (2017-04-21)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 8.1 x64 (build 9600)

Matrix products: default

locale:
[1] LC_COLLATE=English_Australia.1252  LC_CTYPE=English_Australia.1252    LC_MONETARY=English_Australia.1252
[4] LC_NUMERIC=C                       LC_TIME=English_Australia.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] PerformanceAnalytics_1.5.1 quantmod_0.4-9             TTR_0.23-1                 xts_0.10-0                
[5] zoo_1.8-0                 

loaded via a namespace (and not attached):
 [1] Rcpp_0.12.10              lattice_0.20-35           codetools_0.2-15          IKTrading_1.0            
 [5] foreach_1.4.4             grid_3.4.0                curl_2.6                  boot_1.3-19              
 [9] blotter_0.11.3            iterators_1.0.8           FinancialInstrument_1.2.0 compiler_3.4.0           
[13] quantstrat_0.10.0

Answer 1

我无法重现您的错误。虽然您正在下载数据<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="400dp"> <ScrollView android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical">  </LinearLayout> </ScrollView> </LinearLayout>并计算返回from = '2016-01-01'，但您的代码仍然适用于我。也许你可以尝试修复它并看到它？

from='2003-01-01'

Xts计算返回时出错

1 个答案: