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FeatureNames
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FeatureNames

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is an option for machine learning functions such as Classify or Predict that specifies names to use for elements of input data given.

Details

  • Possible settings for FeatureNames include:
  • Automaticassign names automatically
    {"n1","n2",…}name the i^(th) feature "ni"
  • Feature names must be strings.
  • When FeatureNamesAutomatic, features are named "f1", "f2", etc.
  • In the case of a dataset with named features, FeatureNames{"n1","n2",…} can be used to define the ordering of the features.

Examples

Basic Examples  (3)Summary of the most common use cases

Train a classifier and give a name to each feature:

In[1]:=1
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https://wolfram.com/xid/0d6fm1ix0j-48k90i
Out[1]=1

Use the association format to predict a new example:

In[2]:=2
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https://wolfram.com/xid/0d6fm1ix0j-f3cwzr
Out[2]=2

The list format can still be used:

In[3]:=3
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https://wolfram.com/xid/0d6fm1ix0j-6665m0
Out[3]=3

Train a predictor on a training set with named features, and use FeatureNames to set their order:

In[1]:=1
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https://wolfram.com/xid/0d6fm1ix0j-ida89d
Out[1]=1

Features are ordered as specified:

In[2]:=2
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https://wolfram.com/xid/0d6fm1ix0j-mo755h
Out[2]=2

Classify a new example from a list:

In[3]:=3
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https://wolfram.com/xid/0d6fm1ix0j-3pb471
Out[3]=3

Train a classifier without specifying feature names:

In[1]:=1
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https://wolfram.com/xid/0d6fm1ix0j-ood9u1
Out[1]=1

Use Information and FeatureNames to obtain the names that have been automatically given to features:

In[2]:=2
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https://wolfram.com/xid/0d6fm1ix0j-uqpqjo
Out[2]=2

Use these names to classify a new example described by an association:

In[3]:=3
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https://wolfram.com/xid/0d6fm1ix0j-glwpi3
Out[3]=3
Wolfram Research (2015), FeatureNames, Wolfram Language function, https://reference.wolfram.com/language/ref/FeatureNames.html.
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Wolfram Research (2015), FeatureNames, Wolfram Language function, https://reference.wolfram.com/language/ref/FeatureNames.html.

Text

Wolfram Research (2015), FeatureNames, Wolfram Language function, https://reference.wolfram.com/language/ref/FeatureNames.html.

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Wolfram Research (2015), FeatureNames, Wolfram Language function, https://reference.wolfram.com/language/ref/FeatureNames.html.

CMS

Wolfram Language. 2015. "FeatureNames." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/FeatureNames.html.

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Wolfram Language. 2015. "FeatureNames." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/FeatureNames.html.

APA

Wolfram Language. (2015). FeatureNames. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/FeatureNames.html

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Wolfram Language. (2015). FeatureNames. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/FeatureNames.html

BibTeX

@misc{reference.wolfram_2025_featurenames, author="Wolfram Research", title="{FeatureNames}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/FeatureNames.html}", note=[Accessed: 09-July-2025 ]}

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@misc{reference.wolfram_2025_featurenames, author="Wolfram Research", title="{FeatureNames}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/FeatureNames.html}", note=[Accessed: 09-July-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_featurenames, organization={Wolfram Research}, title={FeatureNames}, year={2015}, url={https://reference.wolfram.com/language/ref/FeatureNames.html}, note=[Accessed: 09-July-2025 ]}

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@online{reference.wolfram_2025_featurenames, organization={Wolfram Research}, title={FeatureNames}, year={2015}, url={https://reference.wolfram.com/language/ref/FeatureNames.html}, note=[Accessed: 09-July-2025 ]}