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Bug in "average"
I'm happily using phyphox for measuring and visualising all kinds of movement (skiing, driving by car ...). I just entered the Neuland of the editor for new experiments and I believe I found a bug: If I want to calculate a standard deviation without the corresponding average, the output strangely shows negative numbers. It turned out that I had do connect the "average" output as well to only receive positive standard deviations.

The following experiment shows standard deviations of the pressure in the order of 1bar:

<phyphox version="1.6" locale="en">
    <category>no category</category>
        <container size="100" static="false">t</container>
        <container size="100" static="false">x</container>
        <container size="0" static="false">average</container>
        <container size="0" static="false">stddev</container>
        <sensor rate="1" average="false" type="pressure">
            <output component="x">x</output>
            <output component="t">t</output>
    <analysis sleep="0"  onUserInput="false">
            <input as="buffer">t</input>
            <output as="average" clear="false">average</output>
            <input as="buffer">x</input>
            <output as="stddev" clear="false">stddev</output>
        <view label="New view">
            <graph label="stddev(p)" aspectRatio="2.5" style="lines" lineWidth="1" color="ff7e22" partialUpdate="false" history="1" labelX="s" labelY="hPa" logX="false" logY="false" xPrecision="3" yPrecision="3" scaleMinX="auto" scaleMaxX="auto" scaleMinY="auto" scaleMaxY="auto" minX="0" maxX="0" minY="0" maxY="0">
                <input axis="y">stddev</input>
                <input axis="x">average</input>

Messages In This Thread
Bug in "average" - by Physikator - 01-30-2019, 09:12 PM
RE: Bug in "average" - by Sebastian Staacks - 02-02-2019, 12:28 PM
RE: Bug in "average" - by Physikator - 02-02-2019, 04:43 PM
RE: Bug in "average" - by Sebastian Staacks - 02-03-2019, 08:43 PM

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