How can I increase the size of data points in a discrete plot

I have a figure, created by someone else, to which I need to add one extra set of discrete data points. The added data points, however, are miniscule compared to the ones from the imported .fig file. The code used is:

if true
fig = open('myFig.fig');
hold on
plot(xdata,ydata,'xg');
end

A picture of the resulting plot can be found here (the new data being almost invicible): http://imageshack.us/photo/my-images/534/tempdep.png/

Answer 1

[Jonathan Sullivan]

Try the property MarkerSize.

if true
fig = open('myFig.fig');
hold on
plot(xdata,ydata,'xg','MarkerSize',16);
end