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"String" (Comparison Method) COMPARISON METHOD "String" (Comparison Method) Compare two strings using any distance metric. Details

By default, the "String" comparison method considers two strings to be equivalent if they are identical.
The distance metric and the corresponding tolerance can be set using the DistanceFunction and Tolerance option. EditDistance is the default distance function.
The DistanceFunction is only used for nonzero Tolerance. Other compatible distance metrics include HammingDistance and DamerauLevenshteinDistance.
Additionally, options for the distance metrics, like IgnoreCase, are also supported in the second argument of the AssessmentFunction.
When multiple values in the answer key are within the tolerance range of an answer, the closest value is selected.

Examplesopen all close all Basic Examples (3)

Create an AssessmentFunction for a string question:

Use it to assess an answer:

Define assessment for a DNA sequence with tolerance:

Any sequence within an EditDistance of two is considered correct:

Set multiple answer keys with custom scores and infer the string method:

Get more details from the result:

Scope (2)

Perform category assessment involving strings:

Assess each element of a list separately:

Get the full result details:

Options (2)

Set a custom tolerance:

Compute equivalent comparisons directly:

Using different distance metrics might produce different results:

This is consistent with using the distance metrics directly:

Properties & Relations (1)

When an answer matches multiple values in the answer, the closest value is chosen:

Possible Issues (2)

Some metrics only work when comparing strings with equal length:

The "String" comparison method is based on distances, not patterns. Matching of string patterns is not supported:

Instead, specify StringMatchQ as a custom comparator:

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