Axes for graphs and colorbars
xaxis Draw x-axis
yaxis Draw y-axis
xcaxis Plot x-axis with labels between ticks
ycaxis Plot y-axis with labels between ticks
zaxis Draw a z-axis.
arange Return evenly spaced values within interval
caxis Plot colorbar axis
minorticks Add more ticks to an existing axis
overline Draw a line above data with a text above it