MATLAB: How to change variable name from known string

MATLABstringvariable

Given: I have variable "Old_var=55" and string "New_var".

Want: How to change name from Old_var to New_var by using code, so I will have new variable "New_var=55".

Best Answer

assignin('base',Old_var,'New_var')

Related Solutions

MATLAB: Assigning input string as variable name

This method will be insecure: Imagine the users selects a name, which is already used in your program. Then there is no way to avoid a crash reliably.

Another problem will be evil users, who type:

"system('format C:); y"

Then eval will assign y after it has crashed your computer. I admit, this will not be the standard case. But there are a lot of possible problems, which are less brute.

MATLAB: How to compare string

Try this:

fuel=input('select the gaseous component CH4,ethane,propane,butane,H2,CO,CO2,N2\n'); 
if prod(ismember(fuel,'CH4'))
    density=0.716; %kg/m^ 
    LCV=35.83; %MJ/m^3 
    cc=1; hh=4; oo=0; nn=0; 
    TMmass=cc+hh+oo+hh; 
    disp('total mass of CH4'); 
    disp(TMmass); 
end
if prod(ismember(fuel,'ethane'))
    density=1.342; %kg/m^3
    disp(density);
    LCV=63.76; %MJ/m^3
    disp(LCV);
    cc=2;
    disp(cc);
    hh=6;
    disp(hh);
    oo=0;
    disp(oo);
    nn=0;
    disp(nn);
    TMmass=cc+hh+oo+hh;
    disp('total mass of CH4');
    disp(TMmass);
end

Do not forget to enter your input in char form. Like

>>'CH4'

>>'ethane'

Best Answer

Related Solutions

MATLAB: Assigning input string as variable name

MATLAB: How to compare string

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