mergesigroi

Merge signal regions of interest

Since R2020b

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Syntax

roilimsout = mergesigroi(roilims,s)

Description

roilimsout = mergesigroi(roilims,s) merges the signal regions of interest specified in roilims if they are separated by s samples or less.

example

Examples

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Open Live Script

Consider a two-column matrix of integers that can represent regions of interest of a signal. Merge any regions that are separated by four samples or less. 

rois = [1 10; 17 26; 28 43; 47 57; 64 66];

xrois = mergesigroi(rois,4)
xrois = 3×2

     1    10
    17    57
    64    66

Specify the maximum separation as zero to merge contiguous or repeated regions. 

nrois = [rois; 57 65; 1 10];

xrois = mergesigroi(rois,0)
xrois = 5×2

     1    10
    17    26
    28    43
    47    57
    64    66
Open Live Script

Consider a two-column matrix of integers that can represent regions of interest of a signal. Merge any regions that are separated by four samples or less. The function merges overlapping regions in all cases.

rois = [1 10; 17 26; 24 32; 36 40];

xrois = mergesigroi(rois,4)
xrois = 2×2

     1    10
    17    40

Specify the maximum separation as zero to merge contiguous or repeated regions. 

nrois = [rois; 41 45; 1 10];

xrois = mergesigroi(rois,0)
xrois = 3×2

     1    10
    17    32
    36    40

Input Arguments

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Region-of-interest limits, specified as a two-column matrix of positive integers. The ith row of roilims contains nondecreasing indices corresponding to the beginning and end samples of the ith region of interest of a signal.

Example: [5 8; 12 20; 18 25] specifies a two-column region-of-interest matrix with three regions.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Maximum separation between regions of interest to merge, specified as a nonnegative integer.

If you specify s as 0, mergesigroi merges contiguous, overlapping, or repeated regions specified in roilims.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Output Arguments

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Modified region-of-interest limits, returned as a two-column matrix of positive integers. Output limits are returned in sorted order using the sortrows function.

Extended Capabilities

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C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2020b

See Also

Objects

Functions