Similarity index

Term · Chemistry · MLC-T-CHM-013560

A quantitative measure of the resemblance between two objects or datasets, often used in chemometrics to compare chemical structures or spectral profiles. It assigns a numerical value indicating how alike two entities are based on their shared characteristics. A common example is the Tanimoto similarity index, which ranges from 0 (no similarity) to 1 (identical).

Table 1. Record
Identifier	MLC-T-CHM-013560
Field	Chemistry
Subject	Analytical Chemistry
Synonyms	similarity distance
References	PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 431 (https://doi.org/10.1515/pac-2015-0605)
See also	Euclidean distance; Mahalanobis distance; Tanimoto similarity index; Ward’s minimum variance method; City-block distance; Multivariate data

Record as JSON

{
  "id": "MLC-T-CHM-013560",
  "term": "Similarity index",
  "field": "Chemistry",
  "definition": "A quantitative measure of the resemblance between two objects or datasets, often used in chemometrics to compare chemical structures or spectral profiles. It assigns a numerical value indicating how alike two entities are based on their shared characteristics. A common example is the Tanimoto similarity index, which ranges from 0 (no similarity) to 1 (identical).",
  "synonyms": [
    "similarity distance"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "Euclidean distance",
    "Mahalanobis distance",
    "Tanimoto similarity index",
    "Ward’s minimum variance method",
    "city-block distance",
    "multivariate data"
  ],
  "references": [
    "PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 431 (https://doi.org/10.1515/pac-2015-0605)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/similarity-index/"
}

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