SigmaPlot
SigmaPlot is the scientific-graphing package historically favored in life sciences and academic battery research — used to produce publication-grade figures of cycle life, Coulombic efficiency, and cell-aging curves. As a hard skill it requires fluency in non-linear regression model fitting, transform-based axis configuration (log-log Ragone plots, Arrhenius plots), template authoring, and the export discipline (vector formats, font embedding) that journals require. Research scientists apply it when characterizing a new electrolyte formulation's cycle stability, when fitting capacity-fade data to power-law or exponential decay models, and when generating figures for cell-development internal reports.