How to get all workspace variables with their respective value from within a function?

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Erithax
Erithax 2021-1-28
回答： Erithax 2021-1-28
Say I have some variables
var1 = 3;
str2 = "MATLAB";
syms x y
eqn1 = x + y;
Say I want to get all the variables in this workspace with their respective values from within some function:
function listVars()
allVarNames = evalin( 'base', 'who' )
allVarValues = ???
t = table(allVarnames, allVarValues)
end
Is this possible? If not, is it possible if the variables are of the same type?
----------------------------------------------
I already tried ??? =
evalin('base','allVarNames')
%and
evalin('base',allVarNames)
But these result in these errors respectively:
Error using evalin
Unrecognized function or variable 'allVarNames'.
%and
Error using evalin
Must be a text scalar.
  2 个评论
Stephen23
Stephen23 2021-1-28
编辑：Stephen23 2021-1-28
Is there a particular reason why you cannot simply pass the variables as input/outout arguments?
https://www.mathworks.com/help/matlab/matlab_prog/share-data-between-workspaces.html
What is the actual goal here? Please explain the context a little more.
Erithax
Erithax 2021-1-28
I'm writing a function that automatically displays the equations of a section in the pretty (~live editor) format. So I don't have to do it via the live editor or via calling pretty(eqn1) for every equation I write. So I'd like it to show in a table with the equation names in the first column, and the equations themselves in the 2nd collumn.

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采纳的回答

Erithax
Erithax 2021-1-28
I was able to solve it myself by using a for-loop and the string() function:
function listVars()
allVarNames = evalin( 'base', 'who' )
for i = 1:1:numel(allVarNames)
allVarValues(i) = evalin('base',string(allVarNames(i)))
end
allVarNames = string(allVarNames)
allVarValues = string(allVarValues)'
table(allVarNames,allVarValues)
end
NOTE: If the first variable (alphabetically) is not a symbolic variable, but there are other symbolic variables then this code will throw an error because then allVarValues doesn't have the right type to handle symbolic variables.

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