Microsoft Power BI Data Analyst Certification (PL-300) Practice Test

To create a custom R visual using Power BI Desktop, the initial requirement is to have R installed on your computer. This is crucial because Power BI relies on R to execute scripts and create visualizations. Without R installed, Power BI cannot run R code or leverage R packages, making it impossible to create R visuals.

Having R installed ensures that Power BI can communicate with the R environment and utilize it for data processing and visualization tasks. Once R is properly installed, users can then proceed to configure other settings and enable features related to R scripting within Power BI, but the installation of R itself is the foundational step that supports all subsequent actions.