how to convert the temperature from matrix 4d?
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi, I have a matrix 4d, Size(T)=100 20 15 12, the dimensions are lat lon depth time. I need to convert the temperature Kelvin to Celsius but just in the first two dimensions. Please, how I do it? I have used "convtemp,but without success.
1 commentaire
James Tursa
le 21 Oct 2016
Modifié(e) : James Tursa
le 21 Oct 2016
I don't understand what you mean by "just in the first two dimensions". You only want one plane of your array converted from Kelvin to Celsius? I.e., you deliberately want to end up with an array that has a mixture of Kelvin and Celsius temperatures in it? If the 4D array has temperatures in it, why don't you want all of it converted?
Réponses (2)
TallBrian
le 21 Oct 2016
Hi Camila,
Your data is 4-D which means that every data point corresponds to a point in dimensions. So, when you say, I need to convert just the first two dimensions, maybe you mean I need to convert the data for all points in the first two dimensions, but only for a single value in the 3rd and 4th dimensions, which would be a plane.
In any case, you can use the following code:
kelvin2celcius = @(x) x-273.15;
data = rand(100,20,15,12);
data_new = data;
data_new(:,:,1,1) = kelvin2celcius(data_new(:,:,1,1));
example_modified = data(1,1,1,1)-data_new(1,1,1,1)
example_unmodified = data(1,1,2,1)-data_new(1,1,2,1)
Here you can see only the first index of the 3rd and 4th dimension is modified.
-Brian
0 commentaires
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!