Question

I wrote the code for LU factorization , for partial pivoting and also for full pivoting .
Now , I want to find the “real” solution of the equation A*x = b . The real solution is without using pivoting (partial/full) , and no LU factorization .

How can I do this in matlab ? I guess it should be a single saved word , but not linsolve ,since
it uses LU factorization with partial pivoting when A is square and QR factorization with column pivoting otherwise .

Thanks

Answer 1

Is A invertible?

If so, then

x= A\b; %This is preferred to x=inv(A)*B;

should do the trick. If A is singular you can use the svd() command to find its pseudo-inverse.