Estimate a using inverse matrix calculation. This is principle of linear regression.
As a friendly reminder, we can see the test suite, so it makes the problem more challenging if the solution is not explicitly in the test suite.
The Test Suite needs to allow for floating-point errors in all test cases, as demonstrated in Solution 1575603. (Refer to Problem 44690.) Also, there should be at least four test cases for every problem.
Remove any row in which a NaN appears
Test for balanced parentheses
Angle between two vectors
Replace values under a limit
Calculate geostrophic current
Where is 1?
Analyze observation data
Change string to number
Determine point is located in a circle or not
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