Beispiel #1
0
def main():
    p = OptionParser(__doc__)
    p.add_option(
        "--customfont",
        default="Airswing.ttf",
        choices=available_fonts,
        help="Custom font name",
    )
    p.add_option("--color", default="limegreen", help="Font color")
    p.add_option("--size", default=36, type="int", help="Font size")
    opts, args, iopts = p.set_image_options(figsize="2x1", dpi=60, format="png")

    if len(args) != 1:
        sys.exit(not p.print_help())

    (text,) = args

    plt.rcdefaults()
    fig = plt.figure(1, (iopts.w, iopts.h))
    ax = fig.add_axes([0, 0, 1, 1])

    ax.text(0.5, 0.5, text, color=opts.color, ha="center", va="center")
    fontprop(ax, opts.customfont, size=opts.size)

    ax.set_xlim(0, 1)
    ax.set_ylim(0, 1)
    ax.set_axis_off()

    image_name = text + "." + iopts.format
    savefig(image_name, dpi=iopts.dpi, iopts=iopts)
Beispiel #2
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def main(tx=None):
    """
    %prog newicktree

    Plot Newick formatted tree. The gene structure can be plotted along if
    --gffdir is given. The gff file needs to be `genename.gff`. If --sizes is
    on, also show the number of amino acids.
    """
    p = OptionParser(main.__doc__)
    p.add_option("--outgroup", help="Root the tree using the outgroup. " + \
                      "Use comma to separate multiple taxa.")
    p.add_option("--rmargin",
                 default=.3,
                 type="float",
                 help="Set blank rmargin to the right [default: %default]")
    p.add_option(
        "--gffdir",
        default=None,
        help="The directory that contain GFF files [default: %default]")
    p.add_option("--sizes",
                 default=None,
                 help="The FASTA file or the sizes file [default: %default]")

    opts, args, iopts = set_image_options(p, figsize="8x6")

    if len(args) != 1:
        sys.exit(not p.print_help())

    datafile, = args
    outgroup = None
    if opts.outgroup:
        outgroup = opts.outgroup.split(",")
    pf = datafile.rsplit(".", 1)[0]
    if tx:
        pf = "demo"
    else:
        tx = open(datafile).read()
        logging.debug("Load tree file `{0}`.".format(datafile))

    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])

    draw_tree(root,
              tx,
              rmargin=opts.rmargin,
              outgroup=outgroup,
              gffdir=opts.gffdir,
              sizes=opts.sizes)

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = pf + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #3
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def main(tx=None):
    """
    %prog newicktree

    Plot Newick formatted tree. The gene structure can be plotted along if
    --gffdir is given. The gff file needs to be `genename.gff`. If --sizes is
    on, also show the number of amino acids.
    """
    p = OptionParser(main.__doc__)
    p.add_option("--outgroup", help="Root the tree using the outgroup. " + \
                      "Use comma to separate multiple taxa.")
    p.add_option("--rmargin", default=.3, type="float",
                 help="Set blank rmargin to the right [default: %default]")
    p.add_option("--gffdir", default=None,
                 help="The directory that contain GFF files [default: %default]")
    p.add_option("--sizes", default=None,
                 help="The FASTA file or the sizes file [default: %default]")

    opts, args, iopts = set_image_options(p, figsize="8x6")

    if len(args) != 1:
        sys.exit(not p.print_help())

    datafile, = args
    outgroup = None
    if opts.outgroup:
        outgroup = opts.outgroup.split(",")
    pf = datafile.rsplit(".", 1)[0]
    if tx:
        pf = "demo"
    else:
        tx = open(datafile).read()
        logging.debug("Load tree file `{0}`.".format(datafile))

    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])

    draw_tree(root, tx, rmargin=opts.rmargin,
              outgroup=outgroup, gffdir=opts.gffdir, sizes=opts.sizes)

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = pf + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #4
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    width = iopts.w
    height = iopts.h * ratio
    fig = plt.figure(1, (width, height))
    root = fig.add_axes([0, 0, 1, 1])  # the whole canvas
    ax = fig.add_axes([.1, .1, .8, .8])  # the dot plot

    blastplot(ax,
              blastfile,
              qsizes,
              ssizes,
              qbed,
              sbed,
              style=opts.style,
              proportional=proportional,
              sampleN=opts.sample,
              baseticks=True,
              stripNames=opts.stripNames)

    # add genome names
    to_ax_label = lambda fname: _(op.basename(fname).split(".")[0])
    gx, gy = [to_ax_label(x.filename) for x in (qsizes, ssizes)]
    ax.set_xlabel(gx, size=16)
    ax.set_ylabel(gy, size=16)

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #5
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def heatmap(args):
    """
    %prog heatmap fastafile chr1

    Combine stack plot with heatmap to show abundance of various tracks along
    given chromosome. Need to give multiple beds to --stacks and --heatmaps
    """
    p = OptionParser(heatmap.__doc__)
    p.add_option("--stacks",
                 default="Exons,Introns,DNA_transposons,Retrotransposons",
                 help="Features to plot in stackplot [default: %default]")
    p.add_option("--heatmaps",
                 default="Copia,Gypsy,hAT,Helitron,Introns,Exons",
                 help="Features to plot in heatmaps [default: %default]")
    p.add_option("--meres", default=None,
                 help="Extra centromere / telomere features [default: %default]")
    add_window_options(p)
    opts, args, iopts = set_image_options(p, args, figsize="8x5")

    if len(args) != 2:
        sys.exit(not p.print_help())

    fastafile, chr = args
    window, shift = check_window_options(opts)

    stacks = opts.stacks.split(",")
    heatmaps = opts.heatmaps.split(",")
    stackbeds = [x + ".bed" for x in stacks]
    heatmapbeds = [x + ".bed" for x in heatmaps]
    stackbins = get_binfiles(stackbeds, fastafile, shift)
    heatmapbins = get_binfiles(heatmapbeds, fastafile, shift)

    window, shift = check_window_options(opts)
    margin = .06
    inner = .015
    clen = Sizes(fastafile).mapping[chr]

    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])

    # Gauge
    ratio = draw_gauge(root, margin, clen, rightmargin=4 * margin)
    yinterval = .3
    xx = margin
    yy = 1 - margin
    yy -= yinterval
    xlen = clen / ratio
    if "_" in chr:
        ca, cb = chr.split("_")
        cc = ca[0].upper() + cb

    root.add_patch(Rectangle((xx, yy), xlen, yinterval - inner, color=gray))
    ax = fig.add_axes([xx, yy, xlen, yinterval - inner])

    nbins = clen / shift
    if clen % shift:
        nbins += 1

    owindow = clen / 100
    if owindow > window:
        window = owindow / shift * shift

    stackplot(ax, stackbins, nbins, palette, chr, window, shift)
    root.text(xx + inner, yy + yinterval - 2 * inner, cc, va="top")

    # Legends
    xx += xlen + .01
    yspace = (yinterval - inner) / (len(stackbins) + 1)
    yy = 1 - margin - yinterval
    for s, p in zip(stacks, palette):
        s = s.replace("_", " ")
        s = Registration.get(s, s)

        yy += yspace
        root.add_patch(Rectangle((xx, yy), inner, inner, color=p, lw=0))
        root.text(xx + 1.5 * inner, yy, s, size=10)

    yh = .05  # Heatmap height
    # Heatmaps
    xx = margin
    yy = 1 - margin - yinterval - inner
    for s, p in zip(heatmaps, heatmapbins):
        s = s.replace("_", " ")
        s = Registration.get(s, s)

        yy -= yh
        m = stackarray(p, chr, window, shift)

        Y = np.array([m, m])
        root.imshow(Y, extent=(xx, xx + xlen, yy, yy + yh - inner),
                    interpolation="nearest", aspect="auto")
        root.text(xx + xlen + .01, yy, s, size=10)

    yy -= yh

    meres = opts.meres
    if meres:
        bed = Bed(meres)
        for b in bed:
            if b.seqid != chr:
                continue
            pos = (b.start + b.end) / 2
            cpos = pos / ratio
            xx = margin + cpos
            accn = b.accn.capitalize()
            root.add_patch(CirclePolygon((xx, yy), radius=.01, fc="m", ec="m"))
            root.text(xx + .014, yy, _(accn), va="center", color="m")

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = chr + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #6
0
def stack(args):
    """
    %prog stack fastafile

    Create landscape plots that show the amounts of genic sequences, and repetitive
    sequences along the chromosomes.
    """
    p = OptionParser(stack.__doc__)
    p.add_option("--top", default=10, type="int",
                 help="Draw the first N chromosomes [default: %default]")
    p.add_option("--stacks",
                 default="Exons,Introns,DNA_transposons,Retrotransposons",
                 help="Features to plot in stackplot [default: %default]")
    p.add_option("--switch",
                 help="Change chr names based on two-column file [default: %default]")
    add_window_options(p)
    opts, args, iopts = set_image_options(p, args, figsize="8x8")

    if len(args) != 1:
        sys.exit(not p.print_help())

    fastafile, = args
    top = opts.top
    window, shift = check_window_options(opts)
    switch = opts.switch
    if switch:
        switch = DictFile(opts.switch)

    bedfiles = [x + ".bed" for x in opts.stacks.split(",")]
    binfiles = get_binfiles(bedfiles, fastafile, shift)

    sizes = Sizes(fastafile)
    s = list(sizes.iter_sizes())[:top]
    maxl = max(x[1] for x in s)
    margin = .08
    inner = .02   # y distance between tracks

    pf = fastafile.rsplit(".", 1)[0]
    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])

    max_len = s
    # Gauge
    ratio = draw_gauge(root, margin, maxl)

    # Per chromosome
    yinterval = (1 - 2 * margin) / (top + 1)
    xx = margin
    yy = 1 - margin
    for chr, clen in s:
        yy -= yinterval
        xlen = clen / ratio
        if "_" in chr:
            ca, cb = chr.split("_")
            cc = ca[0].upper() + cb

        if switch and cc in switch:
            cc = "\n".join((cc, "({0})".format(switch[cc])))

        root.add_patch(Rectangle((xx, yy), xlen, yinterval - inner, color=gray))
        ax = fig.add_axes([xx, yy, xlen, yinterval - inner])

        nbins = clen / shift
        if clen % shift:
            nbins += 1

        stackplot(ax, binfiles, nbins, palette, chr, window, shift)
        root.text(xx - .04, yy + .5 * (yinterval - inner), cc, ha="center", va="center")

        ax.set_xlim(0, nbins)
        ax.set_ylim(0, 1)
        ax.set_axis_off()

    # Legends
    yy -= yinterval
    xx = margin
    for b, p in zip(bedfiles, palette):
        b = b.rsplit(".", 1)[0].replace("_", " ")
        b = Registration.get(b, b)

        root.add_patch(Rectangle((xx, yy), inner, inner, color=p, lw=0))
        xx += 2 * inner
        root.text(xx, yy, _(b), size=13)
        xx += len(b) * .012 + inner

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = pf + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #7
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def main():
    p = OptionParser(__doc__)
    p.add_option("--groups", default=False, action="store_true",
                 help="The first row contains group info [default: %default]")
    p.add_option("--rowgroups", help="Row groupings [default: %default]")
    p.add_option("--horizontalbar", default=False, action="store_true",
                 help="Horizontal color bar [default: vertical]")
    p.add_option("--cmap", default="jet",
                 help="Use this color map [default: %default]")
    opts, args, iopts = set_image_options(p, figsize="8x8")

    if len(args) != 1:
        sys.exit(not p.print_help())

    datafile, = args
    pf = datafile.rsplit(".", 1)[0]
    rowgroups = opts.rowgroups

    groups, rows, cols, data = parse_csv(datafile, vmin=1, groups=opts.groups)
    cols = [x.replace("ay ", "") for x in cols]

    if rowgroups:
        fp = open(rowgroups)
        rgroups = []
        for row in fp:
            a, b = row.split()
            irows = [rows.index(x) for x in b.split(",")]
            rgroups.append((a, min(irows), max(irows)))

    plt.rcParams["axes.linewidth"] = 0

    xstart = .18
    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])
    ax = fig.add_axes([xstart, .15, .7, .7])

    default_cm = cm.get_cmap(opts.cmap)
    im = ax.matshow(data, cmap=default_cm, norm=LogNorm(vmin=1, vmax=10000))
    nrows, ncols = len(rows), len(cols)

    xinterval = .7 / ncols
    yinterval = .7 / max(nrows, ncols)

    plt.xticks(range(ncols), cols, rotation=45, size=10, ha="center")
    plt.yticks(range(nrows), rows, size=10)

    for x in ax.get_xticklines() + ax.get_yticklines():
        x.set_visible(False)

    ax.set_xlim(-.5, ncols - .5)

    t = [1, 10, 100, 1000, 10000]
    pad = .06
    if opts.horizontalbar:
        ypos = .5 * (1 - nrows * yinterval) - pad
        axcolor = fig.add_axes([.3, ypos, .4, .02])
        orientation = "horizontal"
    else:
        axcolor = fig.add_axes([.9, .3, .02, .4])
        orientation = "vertical"
    fig.colorbar(im, cax=axcolor, ticks=t, format=_("%d"), orientation=orientation)

    if groups:
        groups = [(key, len(list(nn))) for key, nn in groupby(groups)]
        yy = .5 + .5 * nrows / ncols * .7 + .06
        e = .005
        sep = -.5

        for k, kl in groups:
            # Separator in the array area
            sep += kl
            ax.plot([sep, sep], [-.5, nrows - .5], "w-", lw=2)
            # Group labels on the top
            kl *= xinterval
            root.plot([xstart + e, xstart + kl - e], [yy, yy], "-", color="gray", lw=2)
            root.text(xstart + .5 * kl, yy + e, k, ha="center", color="gray")
            xstart += kl

    if rowgroups:
        from jcvi.graphics.glyph import TextCircle

        xpos = .04
        tip = .015
        assert rgroups
        ystart = 1 - .5 * (1 - nrows * yinterval)
        for gname, start, end in rgroups:
            start = ystart - start * yinterval
            end = ystart - (end + 1) * yinterval
            start -= tip / 3
            end += tip / 3

            # Bracket the groups
            root.plot((xpos, xpos + tip), (start, start), "k-", lw=2)
            root.plot((xpos, xpos), (start, end), "k-", lw=2)
            root.plot((xpos, xpos + tip), (end, end), "k-", lw=2)
            TextCircle(root, xpos, .5 * (start + end), gname)

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = pf + "." + opts.cmap + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #8
0
    image_name = op.splitext(blastfile)[0] + "." + opts.format
    plt.rcParams["xtick.major.pad"] = 16
    plt.rcParams["ytick.major.pad"] = 16

    # Fix the width
    xsize, ysize = qsizes.totalsize, ssizes.totalsize

    ratio = ysize * 1. / xsize if proportional else 1
    width = iopts.w
    height = iopts.h * ratio
    fig = plt.figure(1, (width, height))
    root = fig.add_axes([0, 0, 1, 1])  # the whole canvas
    ax = fig.add_axes([.1, .1, .8, .8])  # the dot plot

    blastplot(ax, blastfile, qsizes, ssizes, qbed, sbed,
            style=opts.style, proportional=proportional, sampleN=opts.sample,
            baseticks=True, stripNames=opts.stripNames)

    # add genome names
    to_ax_label = lambda fname: _(op.basename(fname).split(".")[0])
    gx, gy = [to_ax_label(x.filename) for x in (qsizes, ssizes)]
    ax.set_xlabel(gx, size=16)
    ax.set_ylabel(gy, size=16)

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #9
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def stack(args):
    """
    %prog stack fastafile

    Create landscape plots that show the amounts of genic sequences, and repetitive
    sequences along the chromosomes.
    """
    p = OptionParser(stack.__doc__)
    p.add_option("--top",
                 default=10,
                 type="int",
                 help="Draw the first N chromosomes [default: %default]")
    p.add_option("--stacks",
                 default="Exons,Introns,DNA_transposons,Retrotransposons",
                 help="Features to plot in stackplot [default: %default]")
    p.add_option(
        "--switch",
        help="Change chr names based on two-column file [default: %default]")
    add_window_options(p)
    opts, args, iopts = set_image_options(p, args, figsize="8x8")

    if len(args) != 1:
        sys.exit(not p.print_help())

    fastafile, = args
    top = opts.top
    window, shift, subtract = check_window_options(opts)
    switch = opts.switch
    if switch:
        switch = DictFile(opts.switch)

    bedfiles = [x + ".bed" for x in opts.stacks.split(",")]
    binfiles = get_binfiles(bedfiles, fastafile, shift, subtract)

    sizes = Sizes(fastafile)
    s = list(sizes.iter_sizes())[:top]
    maxl = max(x[1] for x in s)
    margin = .08
    inner = .02  # y distance between tracks

    pf = fastafile.rsplit(".", 1)[0]
    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])

    max_len = s
    # Gauge
    ratio = draw_gauge(root, margin, maxl)

    # Per chromosome
    yinterval = (1 - 2 * margin) / (top + 1)
    xx = margin
    yy = 1 - margin
    for chr, clen in s:
        yy -= yinterval
        xlen = clen / ratio
        if "_" in chr:
            ca, cb = chr.split("_")
            cc = ca[0].upper() + cb

        if switch and cc in switch:
            cc = "\n".join((cc, "({0})".format(switch[cc])))

        root.add_patch(Rectangle((xx, yy), xlen, yinterval - inner,
                                 color=gray))
        ax = fig.add_axes([xx, yy, xlen, yinterval - inner])

        nbins = clen / shift
        if clen % shift:
            nbins += 1

        stackplot(ax, binfiles, nbins, palette, chr, window, shift)
        root.text(xx - .04,
                  yy + .5 * (yinterval - inner),
                  cc,
                  ha="center",
                  va="center")

        ax.set_xlim(0, nbins)
        ax.set_ylim(0, 1)
        ax.set_axis_off()

    # Legends
    yy -= yinterval
    xx = margin
    for b, p in zip(bedfiles, palette):
        b = b.rsplit(".", 1)[0].replace("_", " ")
        b = Registration.get(b, b)

        root.add_patch(Rectangle((xx, yy), inner, inner, color=p, lw=0))
        xx += 2 * inner
        root.text(xx, yy, _(b), size=13)
        xx += len(b) * .012 + inner

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = pf + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()
Beispiel #10
0
def heatmap(args):
    """
    %prog heatmap fastafile chr1

    Combine stack plot with heatmap to show abundance of various tracks along
    given chromosome. Need to give multiple beds to --stacks and --heatmaps
    """
    p = OptionParser(heatmap.__doc__)
    p.add_option("--stacks",
                 default="Exons,Introns,DNA_transposons,Retrotransposons",
                 help="Features to plot in stackplot [default: %default]")
    p.add_option("--heatmaps",
                 default="Copia,Gypsy,hAT,Helitron,Introns,Exons",
                 help="Features to plot in heatmaps [default: %default]")
    p.add_option(
        "--meres",
        default=None,
        help="Extra centromere / telomere features [default: %default]")
    add_window_options(p)
    opts, args, iopts = set_image_options(p, args, figsize="8x5")

    if len(args) != 2:
        sys.exit(not p.print_help())

    fastafile, chr = args
    window, shift, subtract = check_window_options(opts)

    stacks = opts.stacks.split(",")
    heatmaps = opts.heatmaps.split(",")
    stackbeds = [x + ".bed" for x in stacks]
    heatmapbeds = [x + ".bed" for x in heatmaps]
    stackbins = get_binfiles(stackbeds, fastafile, shift, subtract)
    heatmapbins = get_binfiles(heatmapbeds, fastafile, shift, subtract)

    margin = .06
    inner = .015
    clen = Sizes(fastafile).mapping[chr]

    fig = plt.figure(1, (iopts.w, iopts.h))
    root = fig.add_axes([0, 0, 1, 1])

    # Gauge
    ratio = draw_gauge(root, margin, clen, rightmargin=4 * margin)
    yinterval = .3
    xx = margin
    yy = 1 - margin
    yy -= yinterval
    xlen = clen / ratio
    if "_" in chr:
        ca, cb = chr.split("_")
        cc = ca[0].upper() + cb

    root.add_patch(Rectangle((xx, yy), xlen, yinterval - inner, color=gray))
    ax = fig.add_axes([xx, yy, xlen, yinterval - inner])

    nbins = clen / shift
    if clen % shift:
        nbins += 1

    owindow = clen / 100
    if owindow > window:
        window = owindow / shift * shift

    stackplot(ax, stackbins, nbins, palette, chr, window, shift)
    root.text(xx + inner, yy + yinterval - 2 * inner, cc, va="top")

    # Legends
    xx += xlen + .01
    yspace = (yinterval - inner) / (len(stackbins) + 1)
    yy = 1 - margin - yinterval
    for s, p in zip(stacks, palette):
        s = s.replace("_", " ")
        s = Registration.get(s, s)

        yy += yspace
        root.add_patch(Rectangle((xx, yy), inner, inner, color=p, lw=0))
        root.text(xx + 1.5 * inner, yy, s, size=10)

    yh = .05  # Heatmap height
    # Heatmaps
    xx = margin
    yy = 1 - margin - yinterval - inner
    for s, p in zip(heatmaps, heatmapbins):
        s = s.replace("_", " ")
        s = Registration.get(s, s)

        yy -= yh
        m = stackarray(p, chr, window, shift)

        Y = np.array([m, m])
        root.imshow(Y,
                    extent=(xx, xx + xlen, yy, yy + yh - inner),
                    interpolation="nearest",
                    aspect="auto")
        root.text(xx + xlen + .01, yy, s, size=10)

    yy -= yh

    meres = opts.meres
    if meres:
        bed = Bed(meres)
        for b in bed:
            if b.seqid != chr:
                continue
            pos = (b.start + b.end) / 2
            cpos = pos / ratio
            xx = margin + cpos
            accn = b.accn.capitalize()
            root.add_patch(CirclePolygon((xx, yy), radius=.01, fc="m", ec="m"))
            root.text(xx + .014, yy, _(accn), va="center", color="m")

    root.set_xlim(0, 1)
    root.set_ylim(0, 1)
    root.set_axis_off()

    image_name = chr + "." + iopts.format
    logging.debug("Print image to `{0}` {1}".format(image_name, iopts))
    plt.savefig(image_name, dpi=iopts.dpi)
    plt.rcdefaults()