sep_get_header_axis_par - grab headers's n,o,d and label
ierr=sep_get_header_axis_par(tag_history,i_axis,n,o,d,label)
Tag of History File
Axis number of the parameters to read
value of n-i (i = i_axis)
value of o-i (i = i_axis)
value of d-i (i = i_axis)
value of label-i (i = i_axis)
-1 = if fails for other reasons
0 = if successful
+1 = if tag_history is not a Sep History File
Get the values that describe the Header Axes from the History File.
Defaults the others (o=0 d=1 label=``label-i axis'').
sep_get_data_axis_par, sep_get_grid_axis_par, sep_put_header_axis_par
sep3d