problem with matrix is singular

I was trying to make a loop to calculate updated position of user , and I keep getting "Matrix is singular"

Answer 1

[Torsten]

I think you forgot to close the k-loop before the definition of H.

What is the matrix A ? It's not defined in your code.

[Dark]

It's a comment

[Dark]

I closed the loop now , you were right.

But The problem remains ( Waring ) in

delta_x=(inv(H)).*delta_R_;

And G=inv(H'.*H)

[Torsten]

Q       = inv(A'*A)

is a comment ?

[Dark]

I removed it It's the same as G=inv(H'.*H) So I turn it to a comment

[Dark]

When I put the red stop on "end" it gives values, as I press continue, the Waring "matrix is singular " appears .

[Torsten]

Could you include your code properly ?

[Dark]

You can download the text file " gps pos.txt" that I adjusted it clear and organized more.

[Torsten]

There are no adjustments in the file compared to the first version.

But as I already said: The k-loop should be closed before the definition of H.

And the value of "err" is never updated within the while loop. So it will run forever.

[Dark]

Alright , yes err . Thank you. (Here is the file attached).

[Dark]

Yes I found how to update the erreur , what remains is some organization. Thank you so much man

[Dark]

Hello sir, this my final code, if you could make review , I couldn't update position x=x+delta_x in for loop.