| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| gonum.org/v1/plot | Package plot provides an API for setting up plots, and primitives for drawing on plots. |
| gonum.org/v1/plot/font | Package font provides types to describe and select text font faces. |
| gonum.org/v1/plot/palette | Package palette provides basic color palette handling. |
| gonum.org/v1/plot/text | Package text provides types and functions to parse, format and render text. |
| gonum.org/v1/plot/tools/bezier | Package bezier implements 2D Bézier curve calculation. |
| gonum.org/v1/plot/vg | Package vg defines an interface for drawing 2D vector graphics. |
| gonum.org/v1/plot/vg/draw | Package draw provides types and functions to draw shapes on a vg.Canvas. |
| image | Package image implements a basic 2-D image library. |
| image/color | Package color implements a basic color library. |
| math | Package math provides basic constants and mathematical functions. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |