--- title: "Graphing Data, Part I: Quadra Chart and Graph-It" type: "article" slug: "graphing-data-part-i-quadra-chart-and-graph-it" url: "http://localhost/article/graphing-data-part-i-quadra-chart-and-graph-it/" markdown_url: "http://localhost/article/graphing-data-part-i-quadra-chart-and-graph-it.md" published_at: "2026-03-14T00:06:49+00:00" modified_at: "2026-03-14T00:06:50+00:00" featured_image: url: "http://localhost/wp-content/uploads/2022/04/20230809-041332.jpg" excerpt: "Comparative review of two TS2068 graphing programs: Quadra Chart (Psion Software) supports bar, pie, and line charts for up to 6 x/y pairs but has limited y-axis scaling and no user axis labeling. Graph-It (from ZX-Computing Apr-May issue) performs line graphs with user-set axes, full labeling, multiple simultaneous data sets, and best-fit linear regression with…" category: - name: "Timelinez" slug: "timelinez" taxonomy: "category" url: "http://localhost/category/periodicals/timelinez/" post_tag: - name: "Software review" slug: "software-review" taxonomy: "post_tag" url: "http://localhost/tag/software-review/" - name: "TS 2068" slug: "ts2068" taxonomy: "post_tag" url: "http://localhost/tag/ts2068/" model: - name: "Timex/Sinclair 2068" slug: "ts-2068" taxonomy: "model" url: "http://localhost/model/ts-2068/" indiv: - name: "Donald H. Marks" slug: "donald-h-marks" taxonomy: "indiv" url: "http://localhost/indiv/donald-h-marks/" publication_r: id: 21571 title: "Timelinez" type: "periodical" url: "http://localhost/periodical/timelinez/" authors_r: - name: "Donald H. Marks" slug: "donald-h-marks" taxonomy: "indiv" url: "http://localhost/indiv/donald-h-marks/" volume: "2" issue: "9" issues_articles: - id: 38807 title: "Timelinez v2 n9" type: "issue" url: "http://localhost/issue/timelinez-v2-n9/" pages: "8" pubdate: "September 1984" archive_link: false --- # Graphing Data, Part I: Quadra Chart and Graph-It Comparative review of two TS2068 graphing programs: Quadra Chart (Psion Software) supports bar, pie, and line charts for up to 6 x/y pairs but has limited y-axis scaling and no user axis labeling. Graph-It (from ZX-Computing Apr-May issue) performs line graphs with user-set axes, full labeling, multiple simultaneous data sets, and best-fit linear regression with correlation coefficient. Author prefers Graph-It; program listing to be printed in full next month.