getIndex

Class: GFFAnnotation

Return index array of annotations from GFFAnnotation object

Syntax

Idx = getIndex(AnnotObj)
Idx = getIndex(AnnotObj,StartPos,EndPos)
Idx = getIndex(___,Name,Value)

Description

Idx = getIndex(AnnotObj) returns an index array Idx, an array of integers containing the index of each annotation in AnnotObj.

Idx = getIndex(AnnotObj,StartPos,EndPos) returns an index array Idx for a subset of elements that falls within each reference sequence range specified by StartPos and EndPos.

Idx = getIndex(___,Name,Value) returns an index array Idx, using any of the input arguments from the previous syntaxes and additional options specified by one or more Name,Value pair arguments.

Input Arguments

AnnotObj

Object of the GFFAnnotation class.

StartPos

Nonnegative integer specifying the start of a range in each reference sequence in AnnotObj. The integer StartPos must be less than or equal to EndPos.

EndPos

Nonnegative integer specifying the end of a range in each reference sequence in AnnotObj. The integer EndPos must be greater than or equal to StartPos.

Name-Value Pair Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is the argument name and Value is the corresponding value. Name must appear inside quotes. You can specify several name and value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

'Reference'

Character vector or cell array of character vectors specifying one or more reference sequences in AnnotObj. Only indices of annotations whose reference field matches one of the specified references are included in Idx.

'Feature'

Character vector or cell array of character vectors specifying one or more features in AnnotObj. Only indices of annotations whose feature field matches one of the specified features are included in Idx.

'Overlap'

Minimum number of base positions that an annotation must overlap in the range, to have its index included in Idx. This value can be any of the following:

  • Positive integer

  • 'full' — An annotation must be fully contained in the range to be included.

  • 'start' — An annotation’s start position must lie within the range to be included.

Default: 1

Output Arguments

Idx

Array of integers representing indices of elements in AnnotObj.

Examples

Example 30. Retrieve Indices of Annotations from a GFFAnnotation Object

Construct a GFFAnnotation object using a GFF-formatted file that is provided with Bioinformatics Toolbox™.

GFFAnnotObj = GFFAnnotation('tair8_1.gff');

Extract indices of annotations or features for positions 10,000 through 20,000 from the reference sequence.

Idx = getIndex(GFFAnnotObj,10000,20000)

Idx =

    61
    62
    63
    64
    65
    66
    67
    68
    69

See Also

| | | | | | |

Topics

External Websites

Bioinformatics Toolbox Documentation

Support