Effacer les filtres
Effacer les filtres

How can I delete rows in which a specific value is present?

3 vues (au cours des 30 derniers jours)
Vishnu Roy
Vishnu Roy le 28 Oct 2021
I have a dataset of 12 columns and 70,000 rows. I want to delete the rows in which any of the columns has a value 999.25 as it represents null in my data set. What would be the simplest way of doing this as a beginner?

Réponse acceptée

Yongjian Feng
Yongjian Feng le 28 Oct 2021
How about this?
dataset = ones(100, 12); % use your own data instead here
sz = size(dataset);
rowCount = sz(1);
for i=1:rowCount
if any(dataset(i, :) == 999.25)
dataset(i, :) = []; % delete row
end
end

Plus de réponses (1)

Star Strider
Star Strider le 28 Oct 2021
Try something like this —
D = randi(9, 10, 12);
D(randi(numel(D),1,3)) = 999.25
D = 10×12
6.0000 5.0000 5.0000 7.0000 8.0000 1.0000 1.0000 8.0000 4.0000 5.0000 8.0000 5.0000 9.0000 9.0000 7.0000 2.0000 1.0000 5.0000 9.0000 2.0000 9.0000 1.0000 1.0000 2.0000 1.0000 6.0000 6.0000 3.0000 4.0000 5.0000 8.0000 8.0000 2.0000 8.0000 4.0000 999.2500 2.0000 4.0000 3.0000 5.0000 3.0000 3.0000 7.0000 2.0000 9.0000 4.0000 6.0000 999.2500 3.0000 8.0000 2.0000 5.0000 4.0000 4.0000 2.0000 6.0000 3.0000 8.0000 4.0000 4.0000 9.0000 5.0000 7.0000 9.0000 5.0000 5.0000 5.0000 9.0000 9.0000 6.0000 4.0000 8.0000 5.0000 5.0000 3.0000 5.0000 5.0000 3.0000 6.0000 5.0000 4.0000 3.0000 6.0000 6.0000 3.0000 1.0000 999.2500 2.0000 7.0000 2.0000 1.0000 8.0000 5.0000 6.0000 5.0000 7.0000 1.0000 7.0000 6.0000 4.0000 8.0000 3.0000 9.0000 3.0000 2.0000 5.0000 2.0000 5.0000 2.0000 7.0000 6.0000 4.0000 3.0000 3.0000 1.0000 2.0000 3.0000 7.0000 8.0000 3.0000
D = D(~any(D==999.25,2),:)
D = 7×12
6 5 5 7 8 1 1 8 4 5 8 5 9 9 7 2 1 5 9 2 9 1 1 2 3 8 2 5 4 4 2 6 3 8 4 4 9 5 7 9 5 5 5 9 9 6 4 8 5 5 3 5 5 3 6 5 4 3 6 6 1 7 6 4 8 3 9 3 2 5 2 5 2 7 6 4 3 3 1 2 3 7 8 3
This searches for any ‘999.25’ value by row, and then keeps only the rows without that particular value.
.

Produits


Version

R2021b

Community Treasure Hunt

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

Start Hunting!

Translated by