Find columns which have all constant values

Version 1.0.0 (1.18 KB) by Chenghao
This function works for NaN, Missing, numeric, string, boolean, etc
23 Downloads
Updated 21 Nov 2018

View License

Generate test data:

clear;

n = 10;
c1 = repmat(3,[n,1]); % n times of value 3
c2 = rand(n,1); % n values
c3 = repmat(NaN, [n,1]);
c4 = c3;
c4(4) = 2;
c5 = repmat(missing,[n,1]);
c6 = cellstr(repmat('test',n,1));
c7 = c6;
c7{7} = 'hello';
c8 = repmat(false,[n,1]);
c9 = c8;
c9(9) = true;

T = table(c1,c2,c3,c4,c5,c6,c7,c8,c9);

cellData = table2cell(T);
constantColumnIndex = constantColumnExtraction(cellData);
constantColumnNames = T.Properties.VariableNames(constantColumnIndex);

Cite As

Chenghao (2024). Find columns which have all constant values (https://www.mathworks.com/matlabcentral/fileexchange/69489-find-columns-which-have-all-constant-values), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2018b
Compatible with any release
Platform Compatibility
Windows macOS Linux
Categories
Find more on Characters and Strings in Help Center and MATLAB Answers
Tags Add Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
Version Published Release Notes
1.0.0