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Diffstat (limited to 'packages/hmatrix/examples/deriv.hs')
| -rw-r--r-- | packages/hmatrix/examples/deriv.hs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/packages/hmatrix/examples/deriv.hs b/packages/hmatrix/examples/deriv.hs new file mode 100644 index 0000000..c9456d1 --- /dev/null +++ b/packages/hmatrix/examples/deriv.hs | |||
| @@ -0,0 +1,8 @@ | |||
| 1 | -- Numerical differentiation | ||
| 2 | |||
| 3 | import Numeric.GSL | ||
| 4 | |||
| 5 | d :: (Double -> Double) -> (Double -> Double) | ||
| 6 | d f x = fst $ derivCentral 0.01 f x | ||
| 7 | |||
| 8 | main = print $ d (\x-> x * d (\y-> x+y) 1) 1 | ||