Saving to .mat without additional struct.

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Gabriel ROUX
Gabriel ROUX 2022-7-8
评论： Steven Lord 2022-7-8
I have that structure
test =
struct with fields:
F0: 243000
I: [3×3 double]
I_1: [3×3 double]
I_X: 5550000
I_XZ: 33000
%[...]
m: 160000
that i want to save 'as it is'
uisave('test')
I save it as name ('test2'), i load it back and i go this
aircraftdata = load('test2.mat')
aircraftdata =
struct with fields:
test: [1×1 struct]
What i want is a structure like this :
aircraftdata =
struct with fields:
F0: 243000
I: [3×3 double]
I_1: [3×3 double]
I_X: 5550000
I_XZ: 33000
%[...]
m: 160000
The whole point is saving the structure untouched and load it with a new name

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采纳的回答

Steven Lord
Steven Lord 2022-7-8
Ran in:
When you save the struct array, specify the '-struct' option. This will save each of the struct fields separately in the MAT-file. When you call load with an output argument, each of those separate pieces of data from the MAT-file will become fields of the new struct.
S = struct('theAnswer', 42, 'magicMatrix', magic(5), 'nephews', ["Huey", "Dewey", "Louie"])
S = struct with fields:
theAnswer: 42 magicMatrix: [5×5 double] nephews: ["Huey" "Dewey" "Louie"]
cd(tempdir)
name = 'temporaryMatfile.mat';
save(name, '-struct', 'S')
whos('-file', name) % Individual variables
Name Size Bytes Class Attributes magicMatrix 5x5 200 double nephews - 258 string theAnswer 1x1 8 double
data = load(name)
data = struct with fields:
theAnswer: 42 magicMatrix: [5×5 double] nephews: ["Huey" "Dewey" "Louie"]
Compare with:
name2 = 'otherTemporaryMatfile.mat';
save(name2, 'S')
whos('-file', name2) % The struct was stored intact
Name Size Bytes Class Attributes S 1x1 970 struct
data = load(name2)
data = struct with fields:
S: [1×1 struct]
data.S
ans = struct with fields:
theAnswer: 42 magicMatrix: [5×5 double] nephews: ["Huey" "Dewey" "Louie"]
  2 个评论
Gabriel ROUX
Gabriel ROUX 2022-7-8
编辑：Gabriel ROUX 2022-7-8
Thank you very much,
It works fine, but i doesn't suits my needs. I'm working with "uisave()" because it is more user-friendly with AppDesigner. Does uisave allows '-struct' options ? Another issue is that with 'uisave we have no return about what is the filename chosen by the user and what is it's path, so i cannot apply further processing once he's done.
Steven Lord
Steven Lord 2022-7-8
I don't believe uisave offers the '-struct' option. You could try using a different tool, like uiputfile, to select the file to which you want to save. Once you have the file name and path information, use fullfile to construct the fully qualified name and pass name that into save.

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更多回答（2 个）

Steve Eddins
Steve Eddins 2022-7-8
Try this:
s = load("test2.mat");
aircraftdata = s.test;
Gabriel ROUX
Gabriel ROUX 2022-7-8
I have it https://fr.mathworks.com/matlabcentral/answers/330397-how-can-i-save-some-fields-of-a-struct-using-uisave-function#answer_259211

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