Fix extrapad #83

EythorE · 2023-10-10T21:39:50Z

In forestplot/graph_utils.py, extrapad was calculated as xlim[1] * (1 + extrapad) which becomes extremely large when effects are not close to 0.
These lines were refactored into a function _get_pad() which
uses the range xlim[1] - xlim[0] as reference to compute the pad, which fixes the issue.

Modified some of the code to work without internet connection.
Some of the code was trying to access csv's from https://github.com/LSYS/forestplot/tree/main/examples/data
those csv's are available as a part of this repo.
It now first checks if csvs are available in .[forestplot]/examples/data or a user provided Path else it access them through the url.

Tests did not work when working offline. This was because forestplot.dataframe_utils.load_data and forestplot.tests.test_plot.py were trying to access csv's from https://github.com/LSYS/forestplot/tree/main/examples/data. To fix this, a option for setting an environment variable FORESTPLOT_OFFLINE=1 and an argument data_path to forestplot.dataframe_utils.load_data was added. This makes it possible to provide a path to the directory containing csv's to load_data and setting FORESTPLOT_OFFLINE=1 makes it fail immediately if unsuccesful.

extrapad was calculated as xlim[1] * (1 + extrapad) which becomes extremely large when effects are not close to 0. These lines were refactored into a function _get_pad() which uses the range xlim[1] - xlim[0] as reference to compute the pad, which fixes the issue.