我想使用rugarch软件包分析GARCH对2015年至2018年比特币每日收益的影响。我使用zoo包从csv文件导入了数据,数据的标题(BTC_Return)如下所示:
2015-01-02 2015-01-03 2015-01-04 2015-01-05 2015-01-06 2015-01-07
0.001015636 -0.093303963 -0.081262425 0.037516428 0.026674925 0.031626936
当我尝试在GARCH(1,1)模型中拟合数据时,在“加权ARCH LM测试”部分下发生了此错误:“ if(frequency> 1 && abs(frequency-round(frequency)) 有人可以帮助我解决此问题吗?谢谢!> library(zoo)
> BTC_Return <- read.zoo('BTC_Data.csv', header = TRUE, sep = ",", index.column = 1, format = "%Y/%m/%d")
> class(BTC_Return)
> BTC_Return_garch11_spec <- ugarchspec(variance.model = list(garchOrder = c(1,1)), mean.model = list(armaOrder = c(0,0)))
> BTC_Return_garch11_fit <- ugarchfit(spec = BTC_Return_garch11_spec, data = BTC_Return)
> BTC_Return_garch11_fit
*---------------------------------*
* GARCH Model Fit *
*---------------------------------*
Conditional Variance Dynamics
-----------------------------------
GARCH Model : sGARCH(1,1)
Mean Model : ARFIMA(0,0,0)
Distribution : norm
Optimal Parameters
------------------------------------
Estimate Std. Error t value Pr(>|t|)
mu 0.001887 0.000717 2.6322 0.008484
omega 0.000024 0.000007 3.3136 0.000921
alpha1 0.142601 0.019727 7.2289 0.000000
beta1 0.856399 0.018160 47.1585 0.000000
Robust Standard Errors:
Estimate Std. Error t value Pr(>|t|)
mu 0.001887 0.000766 2.4628 0.013786
omega 0.000024 0.000017 1.3863 0.165640
alpha1 0.142601 0.041243 3.4576 0.000545
beta1 0.856399 0.041346 20.7129 0.000000
LogLikelihood : 2685.051
Information Criteria
------------------------------------
Akaike -3.9254
Bayes -3.9101
Shibata -3.9254
Hannan-Quinn -3.9197
Weighted Ljung-Box Test on Standardized Residuals
------------------------------------
statistic p-value
Lag[1] 5.321 0.02107
Lag[2*(p+q)+(p+q)-1][2] 5.997 0.02203
Lag[4*(p+q)+(p+q)-1][5] 7.863 0.03187
d.o.f=0
H0 : No serial correlation
Weighted Ljung-Box Test on Standardized Squared Residuals
------------------------------------
statistic p-value
Lag[1] 5.192 0.02269
Lag[2*(p+q)+(p+q)-1][5] 7.363 0.04230
Lag[4*(p+q)+(p+q)-1][9] 8.637 0.09635
d.o.f=2
Weighted ARCH LM Tests
------------------------------------
Error in if (frequency > 1 && abs(frequency - round(frequency)) < ts.eps) frequency <- round(frequency) :
missing value where TRUE/FALSE needed
答案 0 :(得分:0)
不幸的是,我的帖子对您没有帮助,但可能是那些搜索相关问题的人,就像我一样。
我有一个类似的问题,估计 gjr-garch 模型导致整个估计的 missing value where TRUE/FALSE needed
错误。在寻找解决方案时,我看到了您的帖子。
我的问题是由缺失值(用 omit.na()
解决)和使用小标题代替数字值(用 as.numeric(unlist())
解决)引起的。