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Deprecated**KNIME Base Nodes** version **4.3.2.v202103021015** by **KNIME AG, Zurich, Switzerland**

This node computes certain statistics between the a numeric
column's values (r
_{i}
) and predicted (p
_{i}
) values. It computes
R²
=1-SS
_{res}
/SS
_{tot}
=1-Σ(p
_{i}
-r
_{i}
)²/Σ(r
_{i}
-1/n*Σr
_{i}
)² (can be negative!),
mean absolute error
(1/n*Σ|p
_{i}
-r
_{i}
|),
mean squared error
(1/n*Σ(p
_{i}
-r
_{i}
)²),
root mean squared error
(sqrt(1/n*Σ(p
_{i}
-r
_{i}
)²)), and
mean signed difference
(1/n*Σ(p
_{i}
-r
_{i}
)). The computed values can be inspected in the node's view
and/or further processed using the output table.

- Reference column
- Column with the correct, observed, training data values.
- Predicted column
- Column with the modeled, predicted data values.
- Change column name
- Change the default output column name.
- Output column name
- The name of the column in the output.
- Output scores as flow variables
- Activate to receive all scores as flow variables.
- Prefix of flow variables
- The scores can be exported as flow variables with a hard coded name. This option allows you to define a prefix for these variable identifiers so that name conflicts are resolved.

- The computed statistical measures:
- R² - coefficient of determination , 1-SS_res/SS_tot
- Mean squared error - 1/n*Σ((p_i-r_i)²)
- Mean absolute error - 1/n*Σ|p_i-r_i|
- Root mean squared error - Sqrt(1/n*Σ((p_i-r_i)²))
- Mean signed difference - 1/n*Σ(p_i - r_i)

- Statistics
- A table with the statistical measures

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To use this node in KNIME, install KNIME Base nodes from the following update site:

KNIME 4.3

A zipped version of the software site can be downloaded here.

You don't know what to do with this link? Read our NodePit Product and Node Installation Guide that explains you in detail how to install nodes to your KNIME Analytics Platform.

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