What is typically the first step when using PROC SGPANEL?

When using PROC SGPANEL, the first step is to specify the data source. This is essential because PROC SGPANEL is a procedure used for creating panel (lattice) graphs, which display data in a grid of panels that can show the relationships between variables across different groups defined by the data. By clearly defining the dataset to be used, the procedure can correctly interpret the variables and their values, setting the foundation for any graphical representation.

Establishing the data source ensures that the graphics generated are based on valid and relevant information. If this step is overlooked, the subsequent configurations, such as defining the graph type, assigning labels, or configuring output formats, would lack context and might lead to errors or nonsensical visualizations. Hence, starting with the data source is critical for effective use of PROC SGPANEL.