auto rescaling

[gyre]

Hi Ive made a graph using qwt and its examples...
I want to ask...is there any option to make it look the way that it displays axis only that long as many values it stores....I mean...Im displaying 23 values...but the X-axis are displayed to 25 value
Plus max value of my graph is 10 and graph displays Y-axis to value 10 so I can barely see the plot...
see the attachement picture...