Exporting & Format Detection

toJSON

Currently one export format is available: generic JSON.

import { toJSON } from 'mcmc-visualizer';

const jsonString = toJSON(data);
// Output: { "chain#1": { "mu": [1.2, 1.3, ...], "sigma": [...] }, "chain#2": { ... } }

This format is readable by fromChainArrays() after JSON.parse().

detectFormat

import { detectFormat } from 'mcmc-visualizer';
const format = detectFormat(text);
// 'turing-csv' | 'stan-csv' | 'mcmcchains-json' | 'unknown'

Detection priority:

1. Starts with { and has size, value_flat, parameters → mcmcchains-json
2. First non-comment line has lp__ and accept_stat__ headers → stan-csv
3. Header has iteration,chain or chain_,draw_ → turing-csv (wide)
4. 4-column CSV where columns 3+4 are numeric integers/floats → turing-csv (long)
5. Otherwise → unknown

ArviZ JSON is not auto-detected (it requires fromArviZJSON() explicitly) because it has an ambiguous { prefix.