How to transform points and create new series

Follow these steps to build Affine transformation:

  1. To select series of points in list, double click on it.
  2. The dialog 'Information on points series' will appear.
  3. Click the button <Transform...>
  4. The dialog Transform selected points to new series... starts.
  5. On a page Formula we choose relations Y( u, v )=v*16/(u*u + v*v) and X( u, v )=u*16/(u*u + v*v).
  6. On a page Series we select color, marker, and radius of points.
  7. Input series title.
  8. Use the button <Apply> as Preview.
  9. New series of points will appear. See sample Affine.fgr.

Follow these steps to subtract regression line:

  1. To select series of points in list, double click on it.
  2. The dialog 'Information on points series' will appear.
  3. Click the button <Function...> and build the regression line Y( x ) = Yappr(x).
  4. Click the button <Transform...>
  5. The dialog Transform selected points to new series... starts.
  6. On a page Formula we choose relations Y( u, v ) = v - a + b and X( u, v ) = u.
  7. Select parameter a = Yappr.
  8. Select parameter b = Medium Y.
  9. On a page Parameters we vary parameter c = 0.
  10. On a page Series we select color, marker, and radius of points.
  11. Input series title.
  12. Use the button <Apply> as Preview.
  13. New series of points will appear. See sample Deviation.fgr.

Examples:

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