For loop to save doubles in .mat files

3 views (last 30 days)
I have a .mat file which stores the variables:
E.g: name: ABC, type : 20 x 1; class: double
name: DEF, type : 20 x 1; class: double
name: GHI, type : 20 x 1; class: double
name: JKL, type: 1 x 1; class: struct
name: JKL, type: 1 x 1; class: struct
name: XYZ, type: 7 x 1; class: cell
name: LMN, type : 30 x 1; class: double
etc.
I would like to use only the (20 X1) doubles one by one in another line of code. For instance,
load_mat = load('some_mat_file.mat')
new_var = load_mat.DEF;
new_var = load_mat.GHI;
But instead of writing repeatedly, could you provide an example of a for loop or something else? Thanks a lot in advance.
  2 Comments

Sign in to comment.

Accepted Answer

Voss
Voss on 19 Jul 2022
load_mat = load('some_mat_file.mat')
load_mat = struct with fields:
ABC: [20×1 double] DEF: [20×1 double] GHI: [20×1 double] JKL: [1×1 struct] LMN: [30×1 double] XYZ: {7×1 cell}
% create a new structure, "new_mat", which contains
% only the 20x1 doubles from load_mat:
new_mat = struct();
f = fieldnames(load_mat);
for ii = 1:numel(f)
if isa(load_mat.(f{ii}),'double') && isequal(size(load_mat.(f{ii})),[20 1])
new_mat.(f{ii}) = load_mat.(f{ii});
end
end
new_mat
new_mat = struct with fields:
ABC: [20×1 double] DEF: [20×1 double] GHI: [20×1 double]
  6 Comments

Sign in to comment.

More Answers (0)

Categories

Find more on Structures in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by