### How to transform points and create new series

Follow these steps to build Affine transformation:

- To select series of points in list, double
click on it.
- The dialog 'Information on points series' will appear.
- Click the button <Transform...>
- The dialog
**Transform selected points to new series...** starts.
- 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).
- On a page
**Series** we select color, marker, and radius of points.
- Input series title.
- Use the button <Apply> as Preview.
- New series of points will appear. See sample
**Affine.fgr**.

Follow these steps to subtract regression line:

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

Examples:

- Y(u,v) = 4/v; X(u,v)=4/u;
- Y(u,v) = v*16/(u*u+v*v); X(u,v)=u*16/(u*u+v*v);
- Y(u,v) = v/ a + b; X(u,v)=u; a = approximation y(x), b = Ymedium;
- Y(u,v) = (v-a + b)/c; X(u,v)=u; a,b,c - formulas.