"beta = {5}, lambda = {6} ({7} paths)")
            title = title.format(period, GRID_STEPS[1], MINPECTSNRS[1],
                                 CORR_LENGTHS[1], ALPHAS[1],
                                 BETAS[1], LAMBDAS[1], len(v.paths))
            fig = v.plot(title=title, showplot=False)

            # appending fig to figures of period
            periodfigs.append(fig)

            # exporting figs to pdf
            for fig in periodfigs:
                pdf.savefig(fig)
                plt.close(fig)

    # closing pdf file
    pagenbs = range(pdf.get_pagecount())
    pdf.close()

    # merging pages of pdf with similar period
    key = lambda pagenb: int(pagenb / 3)  # grouping pages 0-1-2, then 3-4-5 etc.

    #pagesgroups = psutils.groupbykey(pagenbs, key=key)
    #print "\nMerging pages of pdf..."
    #psutils.combine_pdf_pages(pdfname, pagesgroups, verbose=True)

    # exporting final maps (using pickle) as a dict:
    # {period: instance of pstomo.VelocityMap}
    print "\nExporting final velocity maps to file: " + picklename
    f = psutils.openandbackup(picklename, 'wb')
    pickle.dump(vmaps, f, protocol=2)
    f.close()
    #print "FTAN outputs 1: ", cleanvgcurves
    
    cleanvgcurves = list(cleanvgcurves)
    
    #print "FTAN outputs 2: ", cleanvgcurves

    # convert FTAN_outputs into numpy array
    cleanvgcurves = np.asarray(cleanvgcurves)
    
    FTAN_delta = (dt.datetime.now() - FTAN_t0).total_seconds()
    
    print "\nIt took {:.1f} seconds to process {} station pairs' FTANS in {}"\
    .format(FTAN_delta, len(pairs), process_type)
    
    print "\nFTAN outputs: ", np.asarray(cleanvgcurves)
    #print "FTAN outputs type: ", type(cleanvgcurves)
    #print "FTAN outputs shape: ", cleanvgcurves.shape
    
    
    print "\nExporting FTANs ... " 
    # exporting vg curves to pickle file
    f = psutils.openandbackup(outputpath + '.pickle', mode='wb')
    pickle.dump(cleanvgcurves, f, protocol=2)
    f.close()


    print "\nFTAN calculations completed and saved.\n"
    # delete xc and cleanvgcurves in an attempt to free up memory
    del xc
    del cleanvgcurves
            title = title.format(period, GRID_STEPS[1], MINPECTSNRS[1],
                                 CORR_LENGTHS[1], ALPHAS[1], BETAS[1],
                                 LAMBDAS[1], len(v.paths))
            fig = v.plot(title=title, showplot=False)

            # appending fig to figures of period
            periodfigs.append(fig)

            # exporting figs to pdf
            for fig in periodfigs:
                pdf.savefig(fig)
                plt.close(fig)

    # closing pdf file
    pagenbs = range(pdf.get_pagecount())
    pdf.close()

    # merging pages of pdf with similar period
    key = lambda pagenb: int(pagenb / 3
                             )  # grouping pages 0-1-2, then 3-4-5 etc.

    #pagesgroups = psutils.groupbykey(pagenbs, key=key)
    #print "\nMerging pages of pdf..."
    #psutils.combine_pdf_pages(pdfname, pagesgroups, verbose=True)

    # exporting final maps (using pickle) as a dict:
    # {period: instance of pstomo.VelocityMap}
    print "\nExporting final velocity maps to file: " + picklename
    f = psutils.openandbackup(picklename, 'wb')
    pickle.dump(vmaps, f, protocol=2)
    f.close()
    cleanvgcurves = np.asarray(cleanvgcurves)
    
    # remove None types from cleanvgcurves
    
    cleanvgcurves = cleanvgcurves[cleanvgcurves != np.array(None)]
    
    print cleanvgcurves

    FTAN_delta = (dt.datetime.now() - FTAN_t0).total_seconds()
    
    print "\nIt took {:.1f} seconds to process {} station pairs' FTANS in {}"\
    .format(FTAN_delta, len(pairs), process_type)
    
    
    print "\nFTAN outputs: ", np.asarray(cleanvgcurves)
    #print "FTAN outputs type: ", type(cleanvgcurves)
    #print "FTAN outputs shape: ", cleanvgcurves.shape
    
    
    print "\nExporting FTANs ... " 
    # exporting vg curves to pickle file
    f = psutils.openandbackup(outputpath + '.pickle', mode='wb')
    pickle.dump(cleanvgcurves, f, protocol=2)
    f.close()


    print "\nFTAN calculations completed and saved.\n"
    # delete xc and cleanvgcurves in an attempt to free up memory
    del xc
    del cleanvgcurves