[jira] [Comment Edited] (GEOMETRY-160) Implement getIndicesOfOccurenceOfElement(Vector x, double element)

["Dimitrios Efthymiou (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GEOMETRY-160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17743375#comment-17743375 ] 

Dimitrios Efthymiou edited comment on GEOMETRY-160 at 7/15/23 11:33 AM:
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[~erans] no, I wouldn't crreate getIndicesOfOccurenceOfElementSmallerThanOrEqualToThreeTimesTheLastElement(List<Double> list). Use-cases are:

*Data Analysis:* It can be useful in data analysis where you may need to know where certain values occur in a dataset. For example, identifying the locations of missing values (NaN), outliers, or specific numerical or categorical values within a dataset.
*Signal Processing:* In signal processing, such a method could be used to identify the indices of peaks or certain threshold crossings in a waveform.
*Text Analysis:* In text processing, this could be applied to identify the positions of certain words or characters in a text represented as a vector of characters or words.
*Search Algorithms:* This function can be employed as a subroutine in many algorithms, for example, to determine the starting points of pattern matching or searching for certain criteria.
*Graphs and Networks:* In graph theory, where nodes or edges might have certain attributes, you can use this function to find the locations of these nodes/edges.
*Game Development:* In game logic, this method could be used to find positions of certain game elements in an array representing a game board or game state.
*Image Processing:* In image processing, it could be used to find indices of specific pixel values or colors.
*Sparse Matrix Representation:* In representing sparse matrices, where most of the elements are zero, this function can be used to identify the locations of non-zero elements.
*Genomic Data Processing:* In bioinformatics, this function can be used to find the occurrences of certain nucleotides or codons in large genomic sequences.
*Economic Data Analysis:* For financial and economic data analysis, it can be used to find the indices where certain economic indicators reach a specific value or threshold.
{*}Machine Learning{*}: During pre-processing of data, this function could be used to locate certain instances in your data before performing operations like deletion, imputation, or transformation.


was (Author: JIRAUSER301169):
[~erans] no, I wouldn't crreate getIndicesOfOccurenceOfElementSmallerThanOrEqualToThreeTimesTheLastElement(List<Double> list). Use-cases are:
 # *Data Analysis:* It can be useful in data analysis where you may need to know where certain values occur in a dataset. For example, identifying the locations of missing values (NaN), outliers, or specific numerical or categorical values within a dataset.

 # *Signal Processing:* In signal processing, such a method could be used to identify the indices of peaks or certain threshold crossings in a waveform.

 # *Text Analysis:* In text processing, this could be applied to identify the positions of certain words or characters in a text represented as a vector of characters or words.

 # *Search Algorithms:* This function can be employed as a subroutine in many algorithms, for example, to determine the starting points of pattern matching or searching for certain criteria.

 # *Graphs and Networks:* In graph theory, where nodes or edges might have certain attributes, you can use this function to find the locations of these nodes/edges.

 # *Game Development:* In game logic, this method could be used to find positions of certain game elements in an array representing a game board or game state.

 # *Image Processing:* In image processing, it could be used to find indices of specific pixel values or colors.

 # *Sparse Matrix Representation:* In representing sparse matrices, where most of the elements are zero, this function can be used to identify the locations of non-zero elements.

 # *Genomic Data Processing:* In bioinformatics, this function can be used to find the occurrences of certain nucleotides or codons in large genomic sequences.

 # *Economic Data Analysis:* For financial and economic data analysis, it can be used to find the indices where certain economic indicators reach a specific value or threshold.

 # {*}Machine Learning{*}: During pre-processing of data, this function could be used to locate certain instances in your data before performing operations like deletion, imputation, or transformation.

> Implement getIndicesOfOccurenceOfElement(Vector x, double element)
> ------------------------------------------------------------------
>
>                 Key: GEOMETRY-160
>                 URL: https://issues.apache.org/jira/browse/GEOMETRY-160
>             Project: Commons Geometry
>          Issue Type: New Feature
>          Components: euclidean1D, euclidean2D, euclidean3D
>            Reporter: Dimitrios Efthymiou
>            Priority: Minor
>              Labels: features
>   Original Estimate: 5h
>  Remaining Estimate: 5h
>
> If we have a vector u = (2, 1, 3, 1, 7) and a number, say, 1 then it returns a list of the indices 1 and 3



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