MATLAB: How to write empty variable….

empty variable

while doing a calculation if i get a variable named "varName" with empty value i wanted to display a message "Dont not Exist"…… how to write a code for checking whether a variable contains value or it is empty… please do reply…

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A = [] % A is empty
isempty(A) % Is A empty?
exist(A,'var')  % Does A exist as variable?

% empty and not existing isnt the same thing

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MATLAB: How to find undefined matrix in a code

If the variable is not defined at all, you can use this:

if( exist('variable_name','var') )
    % variable_name is defined
else
    % variable_name is not defined
end

If the variable is in fact defined but is actually empty, do this instead:

if( isempty(variable_name) )
    % variable_name is empty
else
    % variable_name is not empty
end

MATLAB: Empty Matrix

c = isempty(a) || isempty(b) || a>b

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MATLAB: How to find undefined matrix in a code

MATLAB: Empty Matrix

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