# convert-to-jcamp > Convert strings into JCAMP Latest version **7.0.2** (published 2026-09-18) · MIT license · 0 weekly downloads ## Install ```sh npm install convert-to-jcamp pnpm add convert-to-jcamp yarn add convert-to-jcamp bun add convert-to-jcamp ``` ## Health **Score 60/100 (C)** — status: active. Positive: esm support; no vulnerabilities; recently updated; high maintenance score. Warnings: low downloads; no types. ## Facts | | | |---|---| | Version | 7.0.2 | | Published | 2026-09-18 | | First published | 2017-07-31 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | none | | Module format | ESM | | Dependencies | 4 | | Unpacked size | 153.2 KB | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 1 | | Maintainers | targos, lpatiny, cheminfo-bot, stropitek, maasencioh | ## Links - npm: https://www.npmjs.com/package/convert-to-jcamp - Repository: https://github.com/cheminfo/convert-to-jcamp - Homepage: https://github.com/cheminfo/convert-to-jcamp#readme - Issues: https://github.com/cheminfo/convert-to-jcamp/issues - npm.io page: https://npm.io/package/convert-to-jcamp ## Dependencies (4) - [ml-matrix](https://npm.io/package/ml-matrix.md) ^6.15.0 - [is-any-array](https://npm.io/package/is-any-array.md) ^3.0.0 - [cheminfo-types](https://npm.io/package/cheminfo-types.md) ^1.16.0 - [ml-spectra-processing](https://npm.io/package/ml-spectra-processing.md) ^14.35.1 ## Recent versions - 7.0.2 (latest) — 2026-09-18 - 5.4.7-pre.1687358927 (pre) — 2023-06-21 - 7.0.1 — 2026-07-06 - 7.0.0 — 2026-04-16 - 6.0.0 — 2025-05-16 - 5.4.11 — 2024-08-27 - 5.4.10 — 2024-03-16 - 5.4.9 — 2023-09-05 - 5.4.7 — 2023-06-22 - 5.4.6 — 2023-04-30 - 5.4.5-pre.1682565924 — 2023-04-27 - 5.4.5 — 2023-04-25 - 5.4.4-pre.1682183140 — 2023-04-22 - 5.4.4 — 2023-04-20 - 5.4.3 — 2023-04-10 - … 39 more at https://npm.io/package/convert-to-jcamp/versions ## README # convert-to-jcamp Convert strings into JCAMP.

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## Installation `$ npm install convert-to-jcamp` ## Usage ### From Variables ```js import { fromVariables } from 'convert-to-jcamp'; const variables = { x: { data: [1, 2, 3, 4], label: 'x value', units: 'x unit', isDependent: false, }, y: { data: [2, 3, 4, 5], label: 'y value', units: 'y unit' }, }; const jcamp = fromVariables(variables, { forceNtuples: true, meta: { meta1: 'value1', meta2: 'value2', }, info: { title: 'Hello world', dataType: 'TEST', }, }); ``` There are two functions for NMR. `from1DNMRVariables` and `from2DNMRVariables` generate a NMR JCAMP file from variables. ```js import { from2DNMRVariables } from 'convert-to-jcamp'; const variables = { y: { data: [1, 2], symbol: 'F1', label: 'y', units: 'Hz a', isDependent: false, }, x: { data: [0, 1, 2, 3, 4], symbol: 'F2', label: 'x', units: 'Hz', isDependent: false, }, z: { data: [ [2, 3, 4, 5, 7], [1, 2, 3, 4, 5], ], symbol: 'Y', label: 'z', units: 'arbitrary', isDependent: true, }, }; const jcamp = from2DNMRVariables(variables, { xyEncoding: 'DIFDUP', nmrInfo: { title: '2D NMR', owner: 'cheminfo', dataType: 'nD NMR SPECTRUM', origin: 'lab', }, meta: { NUC1: '1H', NUC2: '13C', SFO1: 400, // Spectrometer frequency for F2 (MHz) SFO2: 100, // Spectrometer frequency for F1 (MHz) }, // Optional: additional metadata info: { '.OBSERVE NUCLEUS': '1H', '.OBSERVER FREQUENCY': 400 }, // Optional: additional JCAMP info fields }); ``` ```js import { from1DNMRVariables } from 'convert-to-jcamp'; const variables = { x: { data: xMultiply(data.x, observeFrequency), label: 'Frequencies', units: 'Hz', symbol: 'X', isDependent: false, }, r: { data: data.re, label: 'real data', units: 'arbitratry units', symbol: 'R', isDependent: true, }, i: { data: data.im, label: 'imaginary data', units: 'arbitratry units', symbol: 'I', isDependent: true, }, }; const jcamp = from1DNMRVariables(variables, { xyEncoding: 'DIFDUP', nmrInfo: { title: 'jcamp 1D', owner: 'cheminfo', dataType: 'NMR Spectrum', origin: 'lab', isFid: false, // true for FID, false for spectrum baseFrequency: 600, // MHz originFrequency: 600, // MHz nucleus: '1H', // Optional fields: // digitalFilter, decim, dspfvs, frequencyOffset, baseFrequency, spectralWidth, solvent, scaleFactor }, meta: { SFO1: 400, NUC1: '1H' }, // Optional: additional metadata would be with ##$ prefix // info: { ... }, // Optional: additional JCAMP info fields would be with ## prefix }); ``` An example for 1D NMR [bruker-to-jcamp](https://github.com/cheminfo/convert-to-jcamp/tree/main/demo/bruker-to-jcamp.ts) conversion is in the [demo folder](https://github.com/cheminfo/convert-to-jcamp/tree/main/demo) ```bash npm install node demo/bruker-to-jcamp.ts ``` ## [API Documentation](https://cheminfo.github.io/convert-to-jcamp/) ## License [MIT](./LICENSE) [npm-image]: https://img.shields.io/npm/v/convert-to-jcamp.svg?style=flat-square [npm-url]: https://npmjs.org/package/convert-to-jcamp [ci-image]: https://github.com/cheminfo/convert-to-jcamp/actions/workflows/nodejs.yml/badge.svg [ci-url]: https://github.com/cheminfo/convert-to-jcamp/actions/workflows/nodejs.yml [codecov-image]: https://img.shields.io/codecov/c/github/cheminfo/convert-to-jcamp.svg?style=flat-square [codecov-url]: https://codecov.io/gh/cheminfo/convert-to-jcamp [download-image]: https://img.shields.io/npm/dm/convert-to-jcamp.svg?style=flat-square [download-url]: https://npmjs.org/package/convert-to-jcamp --- _Source: https://npm.io/package/convert-to-jcamp · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._