MATLAB: How to access a variable in workspace with a string

accessloadstringvariable

I'm trying to make a simple menu system. I have all the variables I need in the workspace, and I have the name of the variable I want to access stored as a string, how do I open the workspace variable using that string?

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Figured out how, used the eval() function.

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MATLAB: Sum of all the variables in workspace how to find

clear all;
x=10;
y=2;
z=3;
allvariables = whos; 
sumOfVars = 0; 
for i = 1:length(allvariables)
    sumOfVars = sumOfVars + eval(allvariables(i).name);
end

MATLAB: How to save the name of a variable and a folder using -printf

You can do this with eval, but you shouldn't. Use a cell array instead.

(I have taken the liberty of adapting some of Stephen Cobeldick's thoughts on this topic) Introspective programing (eval and other functions like it) is slow, and the MATLAB documentation warns specifically against it. Using eval is slow, makes debugging difficult, and removes all code helper tools (code checking, syntax hints, code completion, variable highlighting, etc.). A longer discussion can be found here. If you are not an expert and you think you need eval, there are probably better solutions to your problem. Also, if you are not an expert, you might find interesting and helpful hints on this page (and if you are an expert, you can still learn from it).

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Related Solutions

MATLAB: Sum of all the variables in workspace how to find

MATLAB: How to save the name of a variable and a folder using -printf

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