Effacer les filtres
Effacer les filtres

Finding a specific row in a matrix based on user inputs?

6 vues (au cours des 30 derniers jours)
Nicholas DeGarmo
Nicholas DeGarmo le 26 Fév 2020
Commenté : KALYAN ACHARJYA le 27 Fév 2020
I have a matrix with 365 rows and 7 columns, the first column is the month (1-12) and the second column is a day of that month. The user inputs what month they want to look at in a numeric value (1-12) and then the day they want (1-31), but then I need to take that input data and only find the array with those two specific values, I have no clue how to copy just that row based on those two inputs.
Images to explain:

Réponses (2)

KALYAN ACHARJYA
KALYAN ACHARJYA le 27 Fév 2020
Modifié(e) : KALYAN ACHARJYA le 27 Fév 2020
#Do the necessary changes, as required
%let say mat_data is the main matrix
mat_data=[1 1 3 4 56
1 2 3 4 50
1 3 4 5 90
2 3 5 6 70];
month=input('Enter the Month Any value 1-12: ');
day=input('Enter the Day Any value 1-31: ');
disp('The details is ');
mat_data(mat_data(:,1)==month & mat_data(:,2)==day,:)
  2 commentaires
KSSV
KSSV le 27 Fév 2020
Why to use find when we have logical indexing at best?
KALYAN ACHARJYA
KALYAN ACHARJYA le 27 Fév 2020
Yes, thanks for pointing it out

Connectez-vous pour commenter.


KSSV
KSSV le 27 Fév 2020
Modifié(e) : KSSV le 27 Fév 2020
Let A be your matrix of size 365*7.
themonths = A(:,1) ;
thedays = A(:,2) ;
% Let us say I want 7th month and 7th day indices
m = 7 ; d = 7 ;
idx = themonths == m && thedays == d ;
iwant = A(idx,:) ;

Catégories

En savoir plus sur Matrix Indexing dans Help Center et File Exchange

Produits


Version

R2019b

Community Treasure Hunt

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

Start Hunting!

Translated by