# how to combine these in an array

7 vues (au cours des 30 derniers jours)
ALDO le 29 Avr 2020
Commenté : Adam Danz le 29 Avr 2020
Hi
I have 4 variables with type duration. for example they have sizes a=1x2 duration b=0x1 duration c=0x1duration, d=1x20 duration (not always these sizes). How can i put them in an array or matrix then sort them.
I tried A=sort([a;b;c;d])
but I get the error
Error using duration/horzcat (line 612)
Dimensions of arrays being concatenated are not consistent.
I would appriciate any suggestions
##### 0 commentairesAfficher -2 commentaires plus anciensMasquer -2 commentaires plus anciens

Connectez-vous pour commenter.

### Réponse acceptée

Guillaume le 29 Avr 2020
You're trying to vertically concatenate arrays with different number of columns (2, 1, 1, and 20), which indeed is not possible and makes no sense.
You wouldn't be able to horizontally concatenate them either since they also have a different number of rows (1, 0, 0, and 1).
If you really need to concatenate them into something you 'll have to reshape them to at least one common dimension which is likely a vector:
sort([a(:); b(:); c(:); d(:)])
whether or not it makes sense to reshape them into vectors, only you knows.
On the other hand, if you should have been able to vertically concatenate the vectors in the first place, then something has gone wrong in the code before that and you'll have to explain how these array came to be if you want more help.
##### 2 commentairesAfficher AucuneMasquer Aucune
ALDO le 29 Avr 2020
That worked perfectly! Thank you for your explanation
Adam Danz le 29 Avr 2020
Why can't they be horizontally concatenated?
a = rand(1,2);
b = rand(0,1);
c = rand(0,1);
d = rand(1,120);
z = [a,b,c,d]
result
>> size(z)
ans =
1 122
>> z
z =
Columns 1 through 10
0.50382 0.20128 0.53055 ....

Connectez-vous pour commenter.

### Catégories

En savoir plus sur Creating and Concatenating Matrices dans Help Center et File Exchange

### Community Treasure Hunt

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

Start Hunting!

Translated by