我正在尝试使用Holt Winters和预测函数来预测过去10年的股指周成交量,但我仍然收到错误。你能帮帮我吗?volumen<-read.csv(file.choose(), header = TRUE, sep = ";")HoltWinters(volumen)Error in decompose(ts(x[1L:wind], start = start(x), frequency = f), seasonal) :
the time series has no pe
我得到了错误undefined method 'deliver' for nil:NilClassit "should send an email if user has weekly: true, weekly_article_count: 10) User.send_weekly_emailscope :weekly_email,