MATLAB Answers

GriddedInterpolant performance, meshgrid vs ndgrid formats

11 ビュー (過去 30 日間)
Mark Brandon
Mark Brandon 2021 年 3 月 9 日
回答済み: Matt J 2021 年 3 月 10 日
I have been using griddedInterpolant for a long time now. But, starting today, I got the following warning:
Warning: Query data is in MESHGRID format, NDGRID format will yield better performance.
Convert your query data (Xq, Yq) as follows:
F = griddedInterpolant(. . .);
Xq = Xq'; Yq = Yq';
Vq = F(Xq,Yq);
I searched but have not found any discussion about this performance issue. I am hoping that someone out there can help.
Note that I am fully aware of the difference between MESHGRID and NDGRID formats. I am curious about why the NDGRID format provides an advantage.
My guess is that it has to do with column vs row operations.
Best,
Mark
  1 件のコメント
Mark Brandon
Mark Brandon 2021 年 3 月 10 日
Darova, thanks for the edit.

サインインしてコメントする。

回答 (1 件)

Matt J
Matt J 2021 年 3 月 10 日
Presumably because ndgridded query data will result in the data being looped through with better memory locality.

製品


リリース

R2020b

Community Treasure Hunt

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

Start Hunting!

Translated by