accessing data from a struct

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cgo
cgo 2018-7-21
回答： Anas Alakhras 2023-2-28
I have R, which is a 1x1 struct, which contains a matrix named X. I want to access X, how do I this? I want to load X into the workgroup.
R(1) doesn't seem to do it.

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采纳的回答

Stephan
Stephan 2018-7-21
编辑：Stephan 2018-7-21
Hi,
A = R.X
assigns the Matrix saved in the field X of the struct R to A.
% define empty struct
R = struct()
% add field X containing a matrix
R.X = [1 2 3; 4 5 6]
% assign the matrix from field X to new variable A
A = R.X
% get one element from field x and assign to a
a = R.X(2,3)
Best regards
Stephan
  2 个评论
Samuel Suakye
Samuel Suakye 2022-12-13
How then do you open a .mat file which is a struct?
Stephen23
Stephen23 2022-12-13
编辑：Stephen23 2022-12-13
"How then do you open a .mat file which is a struct?"
A MAT-file is not a structure, a MAT-file is a container which can hold many variables of many classes. It is certainly possible that one or more of those variables are structures (but that does not mean that the file itself "is" a structure).
MAT-files are never/rarely opened, they are simply LOADed:
S = load(nameofthematfile)
https://www.mathworks.com/help/matlab/ref/load.html

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更多回答（1 个）

Anas Alakhras
Anas Alakhras 2023-2-28
R.X

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