How do i "refresh" the data?

[adamtarmstrong]

If I run my function containing
$.MTD.loadChart('MTD',{
chart: {
type: 'column',
renderTo: 'container_mtd',
plotBackgroundColor: '#F7F7F7',
backgroundColor: '#F7F7F7',
spacingRight: 50
},
colors: [HCActivityColors[0],HCActivityColors[1]],
tooltip: {
enabled: false
},.....
each time it creates a whole new instance of the graph. i don't want to create a new instance but update the existing one. can you help me either update the existing instance...or somehow remove the old and then add the new one back?