[PUBDEV-8257] 'cross_validation_metrics_summary' on MOJO Models Use Wrong Type for Columns

[mn-mikke]

Flow UI before the change:

Flow UI after the change:

Serialized cross_validation_metrics_summary after the change:

      "cross_validation_metrics_summary": {
        "name": "Cross-Validation Metrics Summary",
        "description": "",
        "columns": [
          {
            "name": "",
            "type": "string",
            "format": "%s",
            "description": ""
          },
          {
            "name": "mean",
            "type": "float",
            "format": "%f",
            "description": "mean"
          },
          {
            "name": "sd",
            "type": "float",
            "format": "%f",
            "description": "sd"
          },
          {
            "name": "cv_1_valid",
            "type": "float",
            "format": "%f",
            "description": "cv_1_valid"
          },
          {
            "name": "cv_2_valid",
            "type": "float",
            "format": "%f",
            "description": "cv_2_valid"
          },
          {
            "name": "cv_3_valid",
            "type": "float",
            "format": "%f",
            "description": "cv_3_valid"
          }
        ],
        "rowcount": 8,
        "data": [
          [
            "mae",
            "mean_residual_deviance",
            "mse",
            "null_deviance",
            "r2",
            "residual_deviance",
            "rmse",
            "rmsle"
          ],
          [
            5.249874,
            42.981117,
            42.981117,
            4241.9937,
            -0.034168337,
            4329.0825,
            6.5461693,
            0.10129108
          ],
          [
            0.100146376,
            5.8517942,
            5.8517942,
            235.73878,
            0.03448591,
            293.41086,
            0.43952286,
            0.01012987
          ],
          [
            5.134717,
            38.70422,
            38.70422,
            4206.2153,
            0.0030673447,
            4180.0557,
            6.2212715,
            0.09408198
          ],
          [
            5.316587,
            49.649975,
            49.649975,
            4493.5767,
            -0.065009356,
            4667.0977,
            7.0462737,
            0.11287285
          ],
          [
            5.2983184,
            40.589157,
            40.589157,
            4026.1895,
            -0.040563,
            4140.094,
            6.370962,
            0.09691842
          ]
        ]
      }

[michalkurka]

@mn-mikke please change the target branch to master - after our discussion I also changed the target release in the jira

[mn-mikke]

@mn-mikke please change the target branch to master

Done.

[michalkurka]

@mn-mikke looks good, is there an easy way to use 6 decimals of precision instead of just 4?

[mn-mikke]

@michalkurka It seems that all float and double values in tables are hard-coded to have 4 decimal places after the floating point: https://github.com/h2oai/h2o-flow/blob/master/src/ext/modules/routines.coffee#L80

[michalkurka]

Thank you @mn-mikke