R

Question

我正在尝试根据Google分析数据为渠道归因建立马尔可夫模型。为此，我使用的是get_mcf，但我一直收到以下错误消息：

Error in vapply(x, collapse_mcf, character(1)) : values must be length 1,
 but FUN(X[[1]]) result is length 0

    mcf_data_2 <- get_mcf(profileId = profile_id, 
                        start.date = start_date, end.date = end_date, 
                        metrics = "mcf:totalConversions, mcf:totalConversionValue", 
                        dimensions = "mcf:conversionDate, 
                        mcf:basicChannelGroupingPath", 
                        sort = NULL,
                        filters = NULL, 
                        samplingLevel = NULL, 
                        start.index = NULL, max.results = NULL, fetch.by = NULL)