simpleAxis

% simpleAxis(extents, yLevel, xLevel, lineWidth, lineColor)
%
% This function replaces the current (labeled) axis with a simplified axis
% made up of two straight lines. This is designed to be used when
% generating figures for papers where the axis labels are not important or
% will be added through post processing.
%
% INPUTS:
% extents = [xLow, xUpp, yLow, yUpp] = axis extents
% yLevel = y-intercept for the x-axis. Default behavior: ( set to [] )
% if yLow < 0 < yUpp --> yLevel = 0
% else yLevel = yLow
% xLevel = x-intercept for the y-axis. Default behavior: ( set to [] )
% if xLow < 0 < xUpp --> xLevel = 0
% else xLevel = xLow
% lineWidth = axis line width. Default: 1
% lineColor = axis line color. Default: [0,0,0]
%