Check if the number has any digits after the decimal points matlab
109 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Ron Aditya
le 14 Sep 2014
Commenté : Star Strider
le 15 Sep 2014
I have a vector which is a mixture of floating point and whole numbers. I am trying to identify the whole numbers and divide them by 100. Assuming the vector is 'v'
v = [9.3, 6.8, 7, 4.1, 3]
I want to identify 7 and 3. How do I go about this, most of the algorithms I came across on mathworks do not work for a vector or they only return the number of digits after the decimal and if its a whole number i get error.
0 commentaires
Réponse acceptée
Star Strider
le 14 Sep 2014
Modifié(e) : Star Strider
le 14 Sep 2014
This works:
v = [9.3, 6.8, 7, 4.1, 3];
v100 = v(mod(v,1)==0)*100
produces:
v100 =
700 300
It takes advantage of mod(v,1) yielding the part of any element of v to the right of the decimal. If that is zero (it creates a logical subscript vector where those values are true=1), it multiplies that element by 100 and assigns it to v100.
1 commentaire
Roger Stafford
le 14 Sep 2014
You can also use any one of these three: round(v)==v, ceil(v==v, or floor(v)==v in the above code.
Plus de réponses (1)
Ron Aditya
le 15 Sep 2014
1 commentaire
Star Strider
le 15 Sep 2014
My pleasure!
I was under the impression your vector is a numeric array. I didn’t realise it was a string array or cell array of strings. Both Roger’s and my approaches use ‘logical indexing’.
Voir également
Catégories
En savoir plus sur Statistics and Machine Learning Toolbox 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!