Loading from Workspace via string
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Hey,
I am trying to use the load function and point assignement to load data using strings.
Currently I am using a code like this, to access variables via their string names.
a=load('filename.mat')
x=a.('variable_name')
But it can get annoying and time intensive to load the mat file seperately.
Is it possible to skip the a=load part and just to assign x directly through the workspace?
I want basically something like this:
x=workspace.('variable_name');
Thank you.
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Rik
2019-8-6
0 个投票
The matfile function has an interface similar to what you're looking for. You do need to be careful with indexing if you want to prevent loading of the entire variable, but it will allow you to mostly keep the contents of the mat files on the disk instead of memory.
Note that there is a trade-off: this is slower to work with than having the variables in memory, but it might save time and memory when retrieving the variable if you have large variables stored in the mat file and are not using those.
3 个评论
Daniel Schmidt
2019-8-6
编辑：Rik
2019-8-6
Rik
2019-8-6
It seems to me your described situation invites bad habits like numbered variables, but the code below does work (at least on my copy of R2019a).
variable_name = "text";
m=matfile('filename');
data = m.(variable_name);
It works for strings and char arrays, just like accessing fields of a struct.
Daniel Schmidt
2019-8-6
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