Lemonergy · Studio block

Find nonzero elements

Finds nonzero elements and returns their zero-based indices and valid count.

Behavior

indices = {i : uᵢ ≠ 0}; count = number of valid indices. The worked example connects this operation to signals in Lemonergy Studio.

Original Lemonergy interface view. Lines identify ports; they are not a completed simulation circuit.

Ports and observed outputs
Name	Direction	Unit	Meaning
`in0`	input	1	Values; real 4 array.
`out0`	output	1	Indices; u32 4 array.
`out1`	output	1	Count; u32 scalar.

No configurable parameters for this component.

Values = [0,3,0,-1]. Indices at 0 s = [1,3,0,0]; Count at 0 s = 2.

Numerical checks for the bundled synthetic example
Output	Time (s)	Expected value	Unit	Absolute tolerance
Indices `out0`	0	`[1, 3, 0, 0]`	1	1e-08
Count `out1`	0	`2`	1	1e-08

Find nonzero elements / Indices [1]

Find nonzero elements / Indices [1]: 1 — at 0 s

2 actual recorded samples. Lines are visual guides between samples. Synthetic example, not measured cell data.

Finds nonzero elements and returns their zero-based indices and valid count.

Find nonzero elements: indices = {i : uᵢ ≠ 0}; count = number of valid indices. The worked example connects this operation to signals in Lemonergy Studio.
- Use the block reference for settings and connections.
- Implementation tested locally; public release pending.

Zero-based fixed-capacity index vector with zero padding and a separate valid-count output.
Shapes and element types are explicit. Values must be finite; automatic reshaping and unit conversion are not performed.

This software operation and its numerical conventions are defined by the public contract and worked example; no external research result is claimed.

This reference follows the public interface and locally verified numerical checks for an upcoming release.

Contract: Lemonergy Studio public contract · Verification record: verification-2026-10-27