How can I select a specific variable in the .mat file which contains different variables in the user interface?

6 ビュー (過去 30 日間)
Hi! I want to design an app which can draw with a .mat file. How can I select a specific variable in the .mat file which contains different variables in the user interface? By 'text area' or something?

採用された回答

Fangjun Jiang
Fangjun Jiang 2019 年 12 月 5 日
  1. Use load() with return structure.
gongStruct = load('gong.mat');
fieldnames(gongStruct)
  1. Use matfile object.
Help matfile

その他の回答 (1 件)

Cam Salzberger
Cam Salzberger 2019 年 12 月 5 日
編集済み: Cam Salzberger 2019 年 12 月 5 日
Hello Kunpeng,
You may consider using whos to determine the variables available in a MAT file. Then you can specify the variable you want when you call load based on the user selection. This will be faster than loading the entire MAT file into the workspace, unless you expect the user to frequently switch between what they want loaded.
You may also consider checking out the matfile object, as Fangjun suggested.
-Cam
  5 件のコメント
Stephen23
Stephen23 2020 年 3 月 10 日
"I have solved this problem with eval() function!"
A much better** solution is to load into an output variable, just like Fangjun Jiang's Answer shows, and then access its fields:
** better in the sense faster, more efficient, more robust, less buggy, much easier to debug. The approach you are using is not recommended:
Kunpeng Zhang
Kunpeng Zhang 2020 年 3 月 14 日
Wow,that is awesome!!!I will study and try alternative methods. Thank you for your advice!!

サインインしてコメントする。

カテゴリ

Help Center および File ExchangeWorkspace Variables and MAT-Files 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