```
x y dy/dx
...
... input data
...
```

Given input points (x, y values), a variety of curves can be drawn through them depending on boundary conditions (starting tangent, end tangent) and interpolation used.

*Now, I have a set of points (x, y values) but also (dy/dx... slope values) as input data. What software would enable me to draw a curve taking into account slope values?*