Run length encoding error
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Dmitrij Linivenko
le 15 Sep 2020
Commenté : Ameer Hamza
le 16 Sep 2020
Hi,
I'm trying to do RLE encoding using data sheet with temeperature values, but it gives me an error : "Index in position 1 is invalid. Array indices must be positive integers or logical values" for line 15. Can't find the solution for this.
clear all
clc
data = importdata('Temperature.mat');
j = 1;
elems = zeros(length(data),1); % store repeated elements
for i = 1:length(data)
if isempty(find(elems == data(i)))
elems(j) = data(i);
j = j + 1;
end
end
elems
t = tabulate(data); % get frequency table
for n = 1:length(elems);
lens(n) = t(elems(n),1); % get how many each element in elems vector occurs
end
lens
0 commentaires
Réponse acceptée
Ameer Hamza
le 15 Sep 2020
I didn't understand the logic of your code, but here is an alternate solution.
clear all
clc
data = importdata('Temperature.mat');
grps = cumsum([0; diff(data)~=0])+1;
parts = splitapply(@(x) {x}, data, grps);
rle = cellfun(@(x) [x(1) numel(x)], parts, 'uni', 0);
rle = vertcat(rle{:});
First column is values and second column is counts.
2 commentaires
Ameer Hamza
le 16 Sep 2020
I am glad to be of help! You can run each line one by one to get some idea which each step is doing. Documentation will also be helpful.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Logical dans Help Center et File Exchange
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!