I’ve been using the Interpolations.jl package quite happily for a while now. I almost exclusively make use of the convienience constructors for both linear and cubic (mostly 1d) interpolation. I’ve only just recently come accross an aplication whereby I need to use nearest neighbour interpolation, however I just can’t get it to work. Can anyone she any light on what I’m doing wrong. Sorry for presenting such a pedestrian question!

```
using Interpolations
using Plots
a = range(0,2*pi,length=8);
f(x) = cos(x);
x = range(0,2*pi,length=100);
linear = LinearInterpolation(a, f.(a), extrapolation_bc = Line());
cubic = CubicSplineInterpolation(a, f.(a), extrapolation_bc = Line());
nearest = interpolate(a, BSpline(Constant()));
plt = plot(x, f.(x), label="Cosine")
plt = plot!(x, linear.(x), label="Linear Interp")
plt = plot!(x, cubic.(x), label="Cubic Interp")
plt = plot!(x, nearest.(x), label="Nearest")
plt = plot!(title="Interpolation Schemes", legend = :bottomleft)
```

This throws a bounds error. The example works fine for linear and cubic interpolation. Many thanks.