MlContext不了解我的体温类型
我是ML.NET的初学者，我的数据有点问题。当我将它们放入mlContext.Fit(.)中时，收到的错误如下：
Column 'Temperature' has values of I4which is not the same as earlier observed type of R4.这是我的密码：
try
{
var mlContext = new MLContext();
var reader = mlContext.Data.CreateTextReader<TrainData>(separatorChar: ',', hasHeader: false);
var trainData = _context.Datas.Last();
IDataView trainingdataView = reader.Read(Path.Combine(hostingEnvironment.WebRootPath, "data010220192341.txt"));
var pipeline = mlContext.Transforms.Conversion.MapValueToKey("Delay")
.Append(mlContext.Transforms.Categorical.OneHotEncoding("StationDepart"))
.Append(mlContext.Transforms.Categorical.OneHotEncoding("StationArrival"))
.Append(mlContext.Transforms.Categorical.OneHotEncoding("Day"))
.Append(mlContext.Transforms.Categorical.OneHotEncoding("Train"))
.Append(mlContext.Transforms.Categorical.OneHotEncoding("WeatherText"))
.Append(mlContext.Transforms.Categorical.OneHotEncoding("HasPrecipitation"))
.Append(mlContext.Transforms.Categorical.OneHotEncoding("PrecipitationType"))
.Append(mlContext.Transforms.Concatenate("Features", "StationDepart", "StationArrival", "Day", "Train", "WeatherText", "Temperature", "Humidity", "HasPrecipitation", "PrecipitationType", "Time"))
.Append(mlContext.MulticlassClassification.Trainers.StochasticDualCoordinateAscent(labelColumn: "Delay", featureColumn: "Features"))
.Append(mlContext.Transforms.Conversion.MapKeyToValue("PredictedTime"));
var model = pipeline.Fit(trainingdataView);
var prediction = model.CreatePredictionEngine<TrainData, TrainPrediction>(mlContext).Predict(
new TrainData()
{
StationDepart = "Charleroi-Sud",
StationArrival = "Mons",
Day = "Friday",
Train = "BE.NMBS.IC3825",
WeatherText = "Partly cloudy",
Temperature = -1,
Humidity=0,
HasPrecipitation = false,
PrecipitationType=null,
Time=0444
});
return prediction.PredictedTime.ToString();
}
catch (Exception e)
{
return e.Message;
}所以当我得到一个文本文件上的数据之后，我对string列进行编码，并且在我尝试训练模型之后，但是现在我收到了错误。我的数据是：
星期四，南部，星期一，星期四，BE.NMBS.IC3831，部分晴天，-2,0，假,1044,0 Charleroi-南部，星期一，星期四，BE.NMBS.IC932，多云，-2,0，假,1112,0 Charleroi-Sud，Mons，星期四，BE.NMBS.IC3832，大部分多云，-1,0，假,1144,0 Charleroi-Sud，Mons，周四，BE.NMBS.IC933，cloudy，-1,0，假,1212,0 Charleroi-Sud，Mons，星期四，BE.NMBS.IC3842，多数多云，-1,0，假,2144,0 Charleroi-Sud，星期一，星期四，BE.NMBS.IC943，多数多云，-1,0，假,2212,0 Charleroi-Sud，星期一，星期四，BE.NMBS.IC3843，多数多云，-1,0,000，假，假,2247,0 Charleroi-Sud，星期一，星期五，BE.NMBS.IC3825，部分多云，-1,0，0 Charleroi-Sud，星期一，星期五，BE.NMBS.IC3826，大部分多云，-1,0，假，0544,0 Charleroi-Sud，星期一，星期五，BE.NMBS.IC927，多云，-1,0，假，062，0
所以，正如你所看到的，数据和温度之间的所有'，‘之间是一个整数。在TrainData内部，就像这样：
public class TrainData
{
[LoadColumn(0)]
public string StationDepart { get; set; }
[LoadColumn(1)]
public string StationArrival { get; set; }
[LoadColumn(2)]
public string Day { get; set; }
[LoadColumn(3)]
public string Train { get; set; }
[LoadColumn(4)]
public string WeatherText { get; set; }
[LoadColumn(5)]
public int Temperature { get; set; }
[LoadColumn(6)]
public int Humidity { get; set; }
[LoadColumn(7)]
public bool HasPrecipitation { get; set; }
[LoadColumn(8)]
public string PrecipitationType { get; set; }
[LoadColumn(9)]
public int Time { get; set; }
[LoadColumn(10)]
public int Delay { get; set; }
}回答 1
Stack Overflow用户
发布于 2019-02-04 13:59:50
问题是时间、延迟和温度必须在浮点上而不是在int中。
public class TrainData
{
[LoadColumn(0)]
public string StationDepart { get; set; }
[LoadColumn(1)]
public string StationArrival { get; set; }
[LoadColumn(2)]
public string Day { get; set; }
[LoadColumn(3)]
public string Train { get; set; }
[LoadColumn(4)]
public string WeatherText { get; set; }
[LoadColumn(5)]
public float Temperature { get; set; }
[LoadColumn(6)]
public float Humidity { get; set; }
[LoadColumn(7)]
public bool HasPrecipitation { get; set; }
[LoadColumn(8)]
public string PrecipitationType { get; set; }
[LoadColumn(9)]
public float Time { get; set; }
[LoadColumn(10)]
public float Delay { get; set; }
}https://stackoverflow.com/questions/54488258
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