condition if command is possible or not

I want to create a loop that runs through several matrices(A(:,:,n)) and create a condition;

 for i=1:length(A)
  if inv(A(:,:,i) "is possible" 
iv=inv(A(:,:,i)); 
elseif 
disp('impossible')
end
end

how do i syntax "if command is possible" or impossible?

Answer 1

[Rik]

In this case there is probably a function that will tell you if a matrix is invertable, but there is a more general solution. You can use try and catch to do what the names suggest: try some code and catch the error.

for i=1:length(A)
    try
        iv=inv(A(:,:,i)); 
    catch
        disp('impossible')
    end
end

Or:

try
    for i=1:length(A)
        iv=inv(A(:,:,i)); 
    end
catch
    disp('impossible')
end