金融时间序列分析用R语言画简单收益率和对数收益率的ACF图?!答:acf(int[,2], lag.max = 15,type = "correlation", plot = TRUE,main='int monthly acf(int.l[,2], lag.max = 15,type = "correlation", plot = TRUE,main='int monthly log return')Box.test(int[,2], lag = 5, type = "Ljung-Box")Box.test(int[,2], lag = 10, type...