build-parameterized-reportlisted

# Build Parameterized Report Create reports that accept parameters to generate multiple customized variations from a single template. ## When to Use - Generating the same report for different departments, regions, or time periods - Creating client-specific reports from a template - Building dashboards that filter to specific subsets - Automating recurring reports with different inputs ## Inputs - **Required**: Report template (Quarto or R Markdown) - **Required**: Parameter definitions (names, types, defaults) - **Optional**: List of parameter values for batch generation - **Optional**: Output directory for generated reports ## Procedure ### Step 1: Define Parameters in YAML For Quarto (`report.qmd`): ```yaml --- title: "Sales Report: `r params$region`" params: region: "North America" year: 2025 include_forecast: true format: html: toc: true --- ``` For R Markdown (`report.Rmd`): ```yaml --- title: "Sales Report" params: region: "North America" year: 2025 include_forecast: true output: html_document --- ``` **Got:** The YAML header contains a `params:` block with named parameters, each having a default value of the correct type. **If fail:** If rendering fails with "object 'params' not found", ensure the `params:` block is correctly indented under the YAML frontmatter. For Quarto, `params` must be at the top level of the YAML, not nested under `format:`. ### Step 2: Use Parameters in Code ````markdown ```{r} #| label: filter-data data <- full