how does the line plot show the negative numbers

in my project need show some negative number using the line plot , but termui's lineplot widget can Not show that . there any one can help me , or fix it?

Start with termui's lineplot widget and reproduce the reported behavior using negative numbers in a terminal dashboard. Trace how the widget receives and renders plotted values; done means a line plot displays negative values correctly. No source file or test is identified in the issue.

Written by the indexing model from the issue text.