---
title: "Biorhythms"
type: "article"
slug: "biorhythms"
url: "http://localhost/article/biorhythms/"
markdown_url: "http://localhost/article/biorhythms.md"
published_at: "2020-10-27T17:12:29+00:00"
modified_at: "2024-05-26T14:34:11+00:00"
featured_image:
  url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg"
excerpt: "I wrote this program as a result of a great disappointment I experienced after purchasing a Biorhythms program from one of the prominent software companies. The program did not print an accurate set of curves, and did not print a mathematically correct result."
category:
  - name: "Syntax"
    slug: "syntax"
    taxonomy: "category"
    url: "http://localhost/category/periodicals/syntax/"
post_tag:
  - name: "TS 1000"
    slug: "ts1000"
    taxonomy: "post_tag"
    url: "http://localhost/tag/ts1000/"
  - name: "Type-in program"
    slug: "type-in-program"
    taxonomy: "post_tag"
    url: "http://localhost/tag/type-in-program/"
  - name: "ZX81"
    slug: "zx81"
    taxonomy: "post_tag"
    url: "http://localhost/tag/zx81/"
model:
  - name: "Sinclair ZX81"
    slug: "zx81"
    taxonomy: "model"
    url: "http://localhost/model/zx81/"
  - name: "Timex/Sinclair 1000"
    slug: "ts-1000"
    taxonomy: "model"
    url: "http://localhost/model/ts-1000/"
indiv:
  - name: "Doug McRoy"
    slug: "doug-mcroy"
    taxonomy: "indiv"
    url: "http://localhost/indiv/doug-mcroy/"
publication: "Syntax"
publication_r:
  id: 10246
  title: "Syntax"
  type: "periodical"
  url: "http://localhost/periodical/syntax/"
authors: "Doug McRoy"
volume: "5"
issue: "1"
issues_articles:
  - id: 26723
    title: "Syntax/Syntax ZX80 v5 n1"
    type: "issue"
    url: "http://localhost/issue/syntax-syntax-zx80-v5-n1/"
pages: "9-11"
pubdate: "January 1984"
archive_link: false
volumeissue: "v5n1"
---

# Biorhythms

I wrote this program as a result of a great disappointment I experienced after purchasing a Biorhythms program from one of the prominent software companies. The program did not print an accurate set of curves, and did not print a mathematically correct result.