Mathc : The news group of this work.
In these packages, you can verify the result into GnuPlot.
Matrices Packages :
mtrxgo.zip
: Geometric applications.
* Find the coefficients of a polynome,
that passes through three, four, five points.
* Find the coefficients a, b, c, d, e of a conic,
ax**2 + by**2 + cx + dy + e = 0
that passes through four points.
* Find the coefficients a, b, c, d of a circle,
a(x**2 + y**2) + bx + cy + d = 0
that passes through three points.
Vectors Packages :
vectac01.zip :
* Reflection about the x-axis.
* Reflection about the y-axis.
* Reflection about the line y = x.
* Orthogonal projection on the x-axis.
* Orthogonal projection on the y-axis.
vectad.zip :
* Vector2d (vertical horizontal shift).
vectae01.zip :
* Reflection about the xy-plan.
* Reflection about the xz-plan.
* Reflection about the yz-plan.
* Orthogonal projection on the xy-plan.
* Orthogonal projection on the xz-plan.
* Orthogonal projection on the yz-plan.