40 lines
1.6 KiB
ReStructuredText
40 lines
1.6 KiB
ReStructuredText
.. _create-formula:
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Create formula
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##############
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.. image:: images/formula1.png
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:width: 800
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:alt: Formula data
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Here you can enter up to 10 values (angles + gravity) that is then used to create the formula. Angles equal to zero will be regarded as empty even if there is a gravity reading.
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When you submit the values the device will try create a formula with increasing level of complexity. It will start
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with a order 2 formula and then try 3 and 4.
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Once the formula has been created it will validate the formula against the supplied angles/gravity and if there is a too
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high difference, it will fail. You can adjust the sensitivity under advanced settings if you have issues.
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Under the Error Log you will also find hints to what problem the formula creator encountered. Here is an example:
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`CALC: Validation failed on angle 33.430000, deviation too large 5.86, formula order 4`
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`CALC: Validation failed on angle 33.430000, deviation too large 3.14, formula order 2`
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This means that the angle 33.43 had a deviation of 5.8 SG and since the default threshold is 3, it will fail. You
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can also see that it has failed on that point in both a order 2 and 4 formula.
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.. image:: images/qa_1.png
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:width: 400
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:alt: Example of deviating value
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So in this case you can either increase the threshold or remove the angle that has an issue. You can also
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use the graph on the calibration page to identify angles that is probably not correct.
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.. image:: images/formula2.png
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:width: 800
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:alt: Formula graph
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Once the formula is created a graph over the entered values and a simulation of the formula will give you a nice overview on how the formula will work.
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