draw_vals_trajectories(ncfile, values, variable)
ncfile= [ncfile] ',' list of files to use
values= [statisticskind]:[sminv],[smaxv]:[Tint]:[labels]:[legvals]:[gvarname]:[timetit]:[tkind]:
    [timefmt]:[title]:[gkind]:[colorlines]:[typelines]:[widthlines]:[pointtype]:[pointsizee]:[pointfreq]:[figclose]
  [statisticskind]=[statistics][kind]
    [statistics]: which statistics to use, from: 'center', 'min', 'max', 'mean',
      'mean2', 'stdev'
    [kind]: 'box', 'circle' statistics taking the values from a box or a circle
      'trj': value following the trajectory
    [sminv],[smaxv]: minimum and maximum value for the lines or one value for each extreme:
      'Srange': for full range
      'Saroundmean@val': for mean-xtrm,mean+xtrm where xtrm = np.min(mean-min@val,max@val-mean)
      'Saroundminmax@val': for min*val,max*val
      'Saroundpercentile@val': for median-xtrm,median+xtrm where xtrm = np.min(median-percentile_(val),
        percentile_(100-val)-median)
      'Smean@val': for -xtrm,xtrm where xtrm = np.min(mean-min*@val,max*@val-mean)
      'Smedian@val': for -xtrm,xtrm where xtrm = np.min(median-min@val,max@val-median)
      'Spercentile@val': for -xtrm,xtrm where xtrm = np.min(median-percentile_(val),
        percentile_(100-val)-median)
    [Tint]: [Tbeg]@[Tend] or None, interval of time to plot or -1 for all the times
    [leglabels]: ',' separated list of labels for the legend
    [legvals]=[locleg]|[fontsize]:
    [locleg]: location of the legend (0, autmoatic)
      1: 'upper right', 2: 'upper left', 3: 'lower left', 4: 'lower right',
      5: 'right', 6: 'center left', 7: 'center right', 8: 'lower center',
      9: 'upper center', 10: 'center'
    [fontsize]: font size for the legend (auto for 12)
    [gvarname]: name of the variable to appear in the graph
    [timetit]: title of the time axis (assumed x-axis, '|' for spaces)
    [tkind]: kind of time to appear in the graph (assumed x-axis)
      'Nval': according to a given number of values as 'Nval',[Nval]
    'exct': according to an exact time unit as 'exct',[tunit];
      tunit= [Nunits],[tu]; [tu]= 'c': centuries, 'y': year, 'm': month,
        'w': week, 'd': day, 'h': hour, 'i': minute, 's': second,
        'l': milisecond
    [timefmt]: format of the time labels
    [title]: title of the graphic ('|' for spaces)
    [gkind]: kind of graphical output
    [colorlines]: ',' list of colors for the lines, 'None' for automatic, single
      value all the same
    [typelines]: ',' list of types for the lines, 'None' for automatic, single
      value all the same
    [widthlines]: ',' list of width for the lines, 'None' for automatic, single
      value all the same
    [pointtype]: ',' list of type of points for the lines, 'None' for automatic, single
      value all the same
    [pointsizee]: ',' list of size of points for the lines, 'None' for automatic, single
    value all the same
    [pointfreq]: frequency of point plotting, 'all' for all time steps
    [figclose]: whether figure should be close or not
variable= variable to use