astronomix.plotting_helpers.power_law_indicators

Draw power-law slope indicators on log-log plots.

Adds short reference lines of the form y ~ x^p (with optional vertical offsets and labels) anchored at a chosen point, to make the slope of a spectrum or convergence curve easy to read off by eye.

Module Contents

Functions

add_power_law_indicators

Add power-law indicator lines of the form y ~ x^p to a log-log plot.

API

astronomix.plotting_helpers.power_law_indicators.add_power_law_indicators(ax, anchor, exponents, x_span=3.0, scales=None, labels=None, x_label='x', line_kwargs=None, text_kwargs=None)

Add power-law indicator lines of the form y ~ x^p to a log-log plot.

Args:

ax: The (log-log) axes to draw the indicator lines on. anchor: The (x0, y0) point at which the indicators start. exponents: One or more power-law exponents p to draw. x_span: The multiplicative x-extent of each indicator line. scales: Optional per-exponent vertical scale factors (default 1). labels: Optional per-exponent label strings (default x^p). x_label: The symbol used in the default labels. line_kwargs: Keyword arguments forwarded to the line plot. text_kwargs: Keyword arguments forwarded to the label text.