It was blanking the plots.
xaxis(pic, sLabel("Pulling speed (nm/s)"), BottomTop, LeftTicks);
yaxis(pic, sLabel("Unfolding force (pN)"), LeftRight, RightTicks);
xaxis(pic, sLabel("Pulling speed (nm/s)"), BottomTop, LeftTicks);
yaxis(pic, sLabel("Unfolding force (pN)"), LeftRight, RightTicks);
-add(pic, legend(pic), point(pic, E), 20E, UnFill);
+add(pic, legend(pic), point(pic, E), 20E);
picture hist_picture(string datafile,
real xmin=-infinity, real xmax=infinity,
picture hist_picture(string datafile,
real xmin=-infinity, real xmax=infinity,
xaxis(sLabel("Pulling speed (nm/s)"), BottomTop, LeftTicks);
yaxis(sLabel("Unfolding force (pN)"), LeftRight, RightTicks);
xaxis(sLabel("Pulling speed (nm/s)"), BottomTop, LeftTicks);
yaxis(sLabel("Unfolding force (pN)"), LeftRight, RightTicks);
-add(legend(), point(E), 20E, UnFill);
+add(legend(), point(E), 20E);