alteryx r 工具多图输出（使用唯一循环）

Question

在 alteryx 中，我试图在 R 工具中获得多个图形输出。我的循环运行了两次，但我没有得到任何输出。我如何让这个工具输出多个图表。如果我在循环之外调用 p，这个工具会给我一个图表，但我只会得到在工具中运行的最后一个图表。

    library(ggplot2)

    cd <- read.Alteryx("#1", mode="data.frame")


    AlteryxGraph(1, width=1008, height=298)

        #Batch graph output for each unique "group by" configuration.
        for (i in unique(cd$USN))
        {

                #Set graph data for each group:
                plot.data = subset(cd,cd$USN==i)

                #Plot settings:
                p <- ggplot(data=plot.data, aes(x=factor(Dates), y=Counts, fill=Group)) +
                    geom_bar(stat="identity", width = .8, position=position_dodge(), colour="black") + xlab("Kroger Weeks") + ylab("Units") +
                    scale_fill_manual(values=c("#88B4F7", "#FF9333")) + theme(legend.position="bottom", legend.title = element_blank()) + 
                        geom_text(aes(label=Counts), vjust=1.6, color="white", position = position_dodge(0.8), size=3.5) + ggtitle(plot.data$USN) +
                     theme(plot.title = element_text(family = "Trebuchet MS", color="#666666", face="bold", size=16, hjust=0.5)) 

                p + scale_x_discrete("Kroger Weeks", labels=c("11" = "Early", "12" = "P3W4", "13" = "P4W1", "14" = "P4W2", "15" = "P4W3", 
           "16" = "P4W4", "17" = "P5W1", "18" = "P5W2", "19" = "P5W3", "20" = "P5W4",
            "21" = "P6W1", "22" = "P6W2", "23" = "P6W3", "24" = "P6W4", "25" = "P7W1",
            "26" = "P7W2", "27" = "P7W3", "28" = "P7W4", "29" = "P8W1", "30" = "P8W2", "31" = "P8W3", "32" = "P8W4"))

        AlteryxMessage("How Many Times", msg.consts$INFO, priority.consts$LOW)
        p
        }

#p I ONLY GET AN OUTPUT IF I THIS HERE (and only my last graph)


invisible(dev.off())

Answer 1

我有 Alteryx，但用得不多。但是，我认为该问题与在 R 中的循环中显示 ggplot 对象有关。每当您将 p 放入循环中时，它都不太可能出现...... 我建议先尝试print(p) 而不是p。如果它解决了问题。然后，完成。

如果你想存储 ggplot 对象，稍后再查看，然后尝试（我没有更改内部任何内容，只是将循环替换为lapply）：

    myList <- lapply(unique(cd$USN), function(x) {
        #Set graph data for each group:
        plot.data = subset(cd, cd$USN==x)

        #Plot settings:
        p <- ggplot(data=plot.data, aes(x=factor(Dates), y=Counts, fill=Group)) +
            geom_bar(stat="identity", width = .8, position=position_dodge(), colour="black") + xlab("Kroger Weeks") + ylab("Units") +
            scale_fill_manual(values=c("#88B4F7", "#FF9333")) + theme(legend.position="bottom", legend.title = element_blank()) + 
            geom_text(aes(label=Counts), vjust=1.6, color="white", position = position_dodge(0.8), size=3.5) + ggtitle(plot.data$USN) +
            theme(plot.title = element_text(family = "Trebuchet MS", color="#666666", face="bold", size=16, hjust=0.5)) 

        p + scale_x_discrete("Kroger Weeks", labels=c("11" = "Early", "12" = "P3W4", "13" = "P4W1", "14" = "P4W2", "15" = "P4W3", 
                                                      "16" = "P4W4", "17" = "P5W1", "18" = "P5W2", "19" = "P5W3", "20" = "P5W4",
                                                      "21" = "P6W1", "22" = "P6W2", "23" = "P6W3", "24" = "P6W4", "25" = "P7W1",
                                                      "26" = "P7W2", "27" = "P7W3", "28" = "P7W4", "29" = "P8W1", "30" = "P8W2", "31" = "P8W3", "32" = "P8W4"))

        return(p)
    }

您可以通过myList[[1]]、myList[[2]] 等方式访问您的地块。 希望对您有所帮助。