フィルターのクリア

gradient with irregular grid

25 ビュー (過去 30 日間)
Alessio Colella
Alessio Colella 2023 年 5 月 2 日
回答済み: Star Strider 2023 年 5 月 2 日
I have as a variable the temperature at a given depth and longitude, so it is a vector (317,1) where the 317 are all latitudes.
How do I get the gradient of this variable (which I call T) knowing that the latitude grid is irregular?
I can try
gradient_T=gradient(T,e1v) where e1v is the irregular vector?

採用された回答

Star Strider
Star Strider 2023 年 5 月 2 日
The gradient function assumes a fixed step size for the second argument.
The way I calculate the numerical derivative using an irregular grid for the reference (assuming vectors here) is:
gradient_T = gradient(T) ./ gradient(e1v);
That will essentially calculate and generally produces the result I want.
.

その他の回答 (1 件)

Nathan Hardenberg
Nathan Hardenberg 2023 年 5 月 2 日
You can give the positions of the corresponding values as the second function argument. In your case the lattitude for each temperature measurement.
temperature = [30 29 28 27 26 25 24 23];
latitude = [1 2 3 4 5 10 11 20];
T = gradient(temperature, latitude)
T = 1×8
-1.0000 -1.0000 -1.0000 -1.0000 -0.3333 -0.3333 -0.2000 -0.1111

カテゴリ

Help Center および File ExchangeEarth, Ocean, and Atmospheric Sciences についてさらに検索

Community Treasure Hunt

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

Start Hunting!

Translated by