def barplot(self, canvas, x, height, width=<NUM_LIT>, bottom=<NUM_LIT:0>, color=None, label=None, **kwargs):
raise NotImplementedError("<STR_LIT>")<EOL>
Plot vertical bar plot centered at x with height 
and width of bars. The y level is at bottom.

the kwargs are plotting library specific kwargs!

:param array-like x: the center points of the bars
:param array-like height: the height of the bars
:param array-like width: the width of the bars
:param array-like bottom: the start y level of the bars
:param kwargs: kwargs for the specific library you are using.