为什么Amazon预测给了我参数上的错误？

Question

我试图用我在TARGET_TIME_SERIES中的销售额、RELATED_TIME_SERIES的价格和ITEM_METADATA的产品类型来进行预测--这是我在特性中设置的参数：

    {
        "AttributeName": "demand",
        "FeaturizationPipeline": [
            {
                "FeaturizationMethodName": "filling",
                "FeaturizationMethodParameters": {
                    "aggregation": "sum",
                    "backfill": "zero",
                    "frontfill": "none",
                    "middlefill": "zero"
                }
            }
        ]
    },
    {
        "AttributeName": "promotional_price",
        "FeaturizationPipeline": [
            {
                "FeaturizationMethodName": "filling",
                "FeaturizationMethodParameters": {
                    "aggregation": "first",
                    "backfill": "median",
                    "frontfill": "none",
                    "futurefill": "max",
                    "middlefill": "median"
                }
            }
        ]
    },
    {
        "AttributeName": "original_price",
        "FeaturizationPipeline": [
            {
                "FeaturizationMethodName": "filling",
                "FeaturizationMethodParameters": {
                    "aggregation": "first",
                    "backfill": "median",
                    "frontfill": "none",
                    "futurefill": "max",
                    "middlefill": "median"
                }
            }
        ]
    }
]

但它给了我一个错误：

We were unable to train your predictor.
Invalid featurization parameters : {original_price=[frontfill=none, aggregation=first], promotional_price=[frontfill=none, aggregation=first]}.

我不明白。此参数来自文档。

Answer 1

只要发现如果我移除参数“聚合”和“未来填充”，它就能工作。