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fn_registry/cpp/functions/viz/histogram.md
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Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-14 00:28:20 +02:00

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---
name: histogram
kind: component
lang: cpp
domain: viz
version: "1.1.0"
purity: pure
signature: "void histogram(const char* title, const float* values, int count, int bins = -1, float height = 200.0f)"
description: "Histograma con bins automaticos, ejes lock (con AutoFit para bins dinamicos) y altura explicita"
tags: [implot, chart, visualization, gpu, histogram, distribution, locked-axes, pendiente-usar]
uses_functions: ["plot_static_cpp_viz"]
uses_types: []
returns: []
returns_optional: false
error_type: ""
imports: [implot]
tested: false
tests: []
test_file_path: ""
file_path: "cpp/functions/viz/histogram.cpp"
framework: imgui
params:
- name: title
desc: "Titulo del histograma / id interno"
- name: values
desc: "Array de valores numericos a distribuir en bins"
- name: count
desc: "Numero de valores en el array"
- name: bins
desc: "Numero de bins. -1 = automatico via regla de Sturges (ImPlotBin_Sturges). Positivo = numero explicito"
- name: height
desc: "Altura del plot en pixeles (default 200). Explicita para evitar feedback loops con AutoResizeY"
output: "Renderiza el histograma en el frame ImGui actual"
notes: "scaffolding/demo en primitives_gallery"
---
# histogram
Wrapper atomico sobre `ImPlot::PlotHistogram` con seleccion automatica del numero de bins.
## v1.1
- **Altura explicita** (`height`).
- **Ejes con Lock + AutoFit**: a diferencia de bar_chart/line_plot/scatter_plot, histogram necesita el primer fit para decidir limites segun los bins calculados internamente por ImPlot. `AutoFit` hace ese ajuste pero `Lock` bloquea pan/zoom posterior.
- Resto de flags estaticos via `plot_static::kPlotFlags`.
Cuando `bins == -1` usa `ImPlotBin_Sturges` (`ceil(log2(n)) + 1`).