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  • How to find and extract Inflection Point of fitted lines


    Steps to Find Inflection Point

    inflection_points_0.png.5f9cd13f412175882acead6f0657e7fa.png

    Use Scatterplot to display x & y

    2.  Apply Logistic Regression Fit

    • Properties-->Lines & Curves-->Add-->Logistic Regression Curve Fit...

      • (Optional) If grouped by color: Check (One per: Color)

         

    fit_line_1.png.9732b220654f63d48d542c72b63ee175.png

    (select/highlight) Inflection Point -->Label & Tooltips (button)...-->(check/enable) Y50, Log10(X50)

    label_0.png.02082d44dc7b127c15686d57c3ddee7b.png

    (select/highlight) Inflection Point -->More (button) -->Export Curve Fit Result...

    export.png.0d1fed38e00a78f43b7d064a807ff8ee.png

    Once the data is exported, it can then be loaded back into Spotfire.

    Below I am attaching an example DXP file.

    how_to_extract_inflection_point.dxp


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