minmax_scale

std.stats.minmax_scale · Level L1

Rescale to [0, 1] by the minimum and the maximum.

(x − min x) / (max x − min x)

Signature

minmax_scale(x: f64[n]) → f64[n]

Structure

The function as NOVA stores it: one box per input, operation and output, and arrows that carry values. A double border marks a call to another library function; select it to open that function.

xf64[n]ReduceMaxhiReduceMinloSubtractspanSubtractdDivideyyf64[n]
  • input
  • operation
  • constant
  • call
  • output

Verification

  • Signature proven by NOVA’s shape solver, for every size.
  • Equal to the reference (x - x.min()) / (x.max() - x.min()) in exact rational arithmetic, on all 40 test cases.
  • All 149 float64 results inside the running error bound; the closest uses 63% of it.
  • Interpreter and NumPy backend return bit-identical results.
Accuracy in detail
correctly rounded (the float64 nearest the exact value)
88%
bit-equal to the NumPy formula in float64
100%
largest error, in units in the last place
1.73

Identity

Calls
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Called by
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sha256:dc01341b88690fad5c46b276581bc6c1f252355b5d2d653f2265ced93bda1eed

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