lemonergy· battery engineering courses

Lemonergy · Studio block

Extract submatrix

Selects matrix rows and columns to form a smaller matrix.

Implementation ID
native-submatrix
Reviewed
2026-10-27

Behavior

Yᵢⱼ = A[row_indices[i], column_indices[j]]. The worked example connects this operation to signals in Lemonergy Studio.

Interface

Extract submatrix interfaceInputs or arguments on the left, observed outputs on the right. Conserving terminals appear below the component. The tables give units and behavior.Extract submatrixStudio blockin0out0
Original Lemonergy interface view. Lines identify ports; they are not a completed simulation circuit.
Ports and observed outputs
NameDirectionUnitMeaning
in0input1Matrix; real 2 × 3 array.
out0output1Result; real 1 × 2 array.

Parameters

Defaults are initial model values. Select values for your own model and operating conditions.

Configuration fields
ParameterUnitDefaultMeaning and limits
Row indices
tables[0]		1[1]Zero-based indices.
Column indices
tables[1]		1[0, 2]Configured coefficients or initial values in column-major order.

Equations and rules

  • Yᵢⱼ = A[row_indices[i], column_indices[j]]

Worked example

Extract submatrix — worked example

Matrix = [1,2,3,4,5,6]. Result at 0 s = [2,6].

Open Studio example after release →
Numerical checks for the bundled synthetic example
OutputTime (s)Expected valueUnitAbsolute tolerance
Result
out0		0[2, 6]11e-08

Explore the recorded outputs

Extract submatrix recorded example

Extract submatrix [1, 1]
Extract submatrix [1, 1] against timeRecorded synthetic simulation values. Time in seconds; output in —.1.501.750.2520.52.250.752.51—Time (s)
Extract submatrix [1, 1]: 2 — at 0 s

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

Download the recorded samples (JSON) · Open this Studio example after release

Use in a workflow

Extract submatrix — worked example

Selects matrix rows and columns to form a smaller matrix.

  1. Extract submatrix: Yᵢⱼ = A[row_indices[i], column_indices[j]]. 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.
Open Studio example after release

Connected concepts

Limits and interpretation

  • Shapes and element types are explicit. Values must be finite; automatic reshaping and unit conversion are not performed.

Scientific and mathematical references

These sources explain the scientific and mathematical background. The behavior, interface and limits above define the Lemonergy implementation; a citation does not imply every model option in the source is implemented.

  1. NIST Digital Library of Mathematical Functions, §3.2 Linear Algebra

    National Institute of Standards and Technology

    Technical reference · Linear algebra and matrix operations; conceptual background, not software certification.

Implementation sources

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

  • docs/glossary/native-block-verification.json

This implementation and its workflow uses (JSON) · Knowledge graph (JSON-LD)