problem with matrix is singular

2023 2 2
1 个回答
更新时间：2023 2 7
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0 个投票

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

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回答（1 个）

Torsten
Torsten 2023-2-2
移动：Torsten 2023-2-2

0 个投票

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.

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Dark
Dark 2023-2-2
It's a comment
Dark
Dark 2023-2-2
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)
Dark
Dark 2023-2-2
I removed it It's the same as G=inv(H'.*H) So I turn it to a comment
Dark
Dark 2023-2-2
When I put the red stop on "end" it gives values, as I press continue, the Waring "matrix is singular " appears .
Torsten
Torsten 2023-2-2
Could you include your code properly ?
Dark
Dark 2023-2-2
编辑：Dark 2023-2-2
You can download the text file " gps pos.txt" that I adjusted it clear and organized more.
Torsten
Torsten 2023-2-2
编辑：Torsten 2023-2-2
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
Dark 2023-2-2
Alright , yes err . Thank you. (Here is the file attached).
Dark
Dark 2023-2-2
Yes I found how to update the erreur , what remains is some organization. Thank you so much man
Dark
Dark 2023-2-5
编辑：Dark 2023-2-5
Hello sir, this my final code, if you could make review , I couldn't update position x=x+delta_x in for loop.

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Dark
2023-2-2

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