I tried the "setminsize" function for the scatter plot. There is still a big gap before the xAxis of the scatter plot and the bottom of the scatter plot.
I don't have such a problem with other plots(eg, floatingbar plot, leaner plot..). I'm wondering about if the scatter plot is consistant with other plots in terms of the size.
Sorry, but we cannot reproduce the problem you describe. The type of plot has nothing to do with the scaling of the coordinate system or axes. It is most likely that you are doing something different on the scaling in the graph that has the scatter plot compared to the other plots, and your problem has nothing to do with the plot being a scatter plot.
If you simply take your program and change only the plot type, from a scatter plot to a SimpleLinePlot, or SimpleLineMarkerPlot, are you saying that suddenly everything works ?
If you are unable to solve the problem you should create a simple example program, similar to our UserChartExample1 and zip the ENTIRE project after erasing the \bin and \obj directories of the project. Then send it to support@quinn-curtis.com as an attachment.