view home/ubuntu/lefse_to_export/plot_cladogram.py @ 2:a31c10fe09c8 draft default tip

Fixed bug due to numerical approximation after normalization affecting root-level clades (e.g. "Bacteria" or "Archaea")

#!/usr/bin/env python

import os,sys,matplotlib,argparse,string
matplotlib.use('Agg')
from pylab import *
from lefse import *
import numpy as np

colors = ['r','g','b','m','c',[1.0,0.5,0.0],[0.0,1.0,0.0],[0.33,0.125,0.0],[0.75,0.75,0.75],'k']
dark_colors = [[0.4,0.0,0.0],[0.0,0.2,0.0],[0.0,0.0,0.4],'m','c',[1.0,0.5,0.0],[0.0,1.0,0.0],[0.33,0.125,0.0],[0.75,0.75,0.75],'k']

class CladeNode:
	def __init__(self, name, abundance, viz = True):
     		self.id = name
     		self.name = name.split(".")
		self.last_name = self.name[-1]
		self.abundance = abundance
		self.pos = (-1.0,-1.0)
		self.children = {}
		self.isleaf = True
		self.color = 'y'
		self.next_leaf = -1
		self.prev_leaf = -1
		self.viz = viz
	def __repr__(self):
		return self.last_name
	def add_child(self,node):
		self.isleaf = False
		self.children[node.__repr__()] = node
	def get_children(self):
		ck = sorted(self.children.keys())
		return [self.children[k] for k in ck]
	def get_color(self):
		return self.color
	def set_color(self,c):
		self.color = c
	def set_pos(self,pos):
		self.pos = pos

def read_params(args):
	parser = argparse.ArgumentParser(description='Cladoplot')
	parser.add_argument('input_file', metavar='INPUT_FILE', type=str, help="tab delimited input file")
	parser.add_argument('output_file', metavar='OUTPUT_FILE', type=str, help="the file for the output image")
	parser.add_argument('--clade_sep',dest="clade_sep", type=float, default=1.5)
	parser.add_argument('--max_lev',dest="max_lev", type=int, default=-1)
	parser.add_argument('--max_point_size',dest="max_point_size", type=float, default=6.0)
	parser.add_argument('--min_point_size',dest="min_point_size", type=float, default=1)
	parser.add_argument('--point_edge_width',dest="markeredgewidth", type=float, default=.25)
	parser.add_argument('--siblings_connector_width',dest="siblings_connector_width", type=float, default=2)
	parser.add_argument('--parents_connector_width',dest="parents_connector_width", type=float, default=0.75)
	parser.add_argument('--radial_start_lev',dest="radial_start_lev", type=int, default=1)
	parser.add_argument('--labeled_start_lev',dest="labeled_start_lev", type=int, default=2)
	parser.add_argument('--labeled_stop_lev',dest="labeled_stop_lev", type=int, default=5)
	parser.add_argument('--abrv_start_lev',dest="abrv_start_lev", type=int, default=3)
	parser.add_argument('--abrv_stop_lev',dest="abrv_stop_lev", type=int, default=5)
	parser.add_argument('--expand_void_lev',dest="expand_void_lev", type=int, default=1)
	parser.add_argument('--class_legend_vis',dest="class_legend_vis", type=int, default=1)
	parser.add_argument('--colored_connector',dest="colored_connectors", type=int, default=1)
	parser.add_argument('--alpha',dest="alpha", type=float, default=0.2)
	parser.add_argument('--title',dest="title", type=str, default="Cladogram")
	parser.add_argument('--sub_clade',dest="sub_clade", type=str, default="")
	parser.add_argument('--title_font_size',dest="title_font_size", type=str, default="14")
	parser.add_argument('--right_space_prop',dest="r_prop", type=float, default=0.1)
	parser.add_argument('--left_space_prop',dest="l_prop", type=float, default=0.1)
	parser.add_argument('--label_font_size',dest="label_font_size", type=str, default="6")
	parser.add_argument('--background_color',dest="back_color", type=str, choices=["k","w"], default="w", help="set the color of the background")
	parser.add_argument('--colored_labels',dest="col_lab", type=int, choices=[0,1], default=1, help="draw the label with class color (1) or in black (0)")
	parser.add_argument('--class_legend_font_size',dest="class_legend_font_size", type=str, default="10")
	parser.add_argument('--dpi',dest="dpi", type=int, default=72)
	parser.add_argument('--format', dest="format", choices=["png","svg","pdf"], default="svg", type=str, help="the format for the output file")
	parser.add_argument('--all_feats', dest="all_feats", type=str, default="")
	args = parser.parse_args()
	return vars(args) 

def cmp_names(la,lb):
	if len(la) != len(lb): return False
	for p in [(a,b) for i,a in enumerate(la) for j,b in enumerate(lb) if i == j]:
		if p[0] != p[1]: return False
	return True	

def build_tree(father,all_nodes,l,depth,viz):
	cc = [n for n in all_nodes if len(n.name) > len(father.name) and cmp_names(father.name,n.name[:len(father.name)])]
	children = [n for n in cc if len(n.name) == len(father.name)+1]
	if len(children) == 0 and l < depth -1: # !!!
		nc = CladeNode(father.id+"."+father.id.split(".")[-1],1.0,viz)
		father.add_child(nc)
		children.append(nc)
	for child in children:
		build_tree(child,cc,l+1,depth,viz)
		father.add_child(child)

def get_all_nodes(father):
	ret = [father]
	children = father.get_children()
	for c in children:
		ret += get_all_nodes(c)
	return ret

def read_data(input_file,params):
	with open(input_file, 'r') as inp:
		if params['sub_clade'] == "": rows = [line.strip().split()[:-1] for line in inp.readlines() if params['max_lev'] < 1 or line.split()[0].count(".") < params['max_lev']]
		else: rows = [line.split(params['sub_clade']+".")[1].strip().split()[:-1] for line in inp.readlines() if ( params['max_lev'] < 1 or line.split()[0].count(".") < params['max_lev'] ) and line.startswith(params['sub_clade']+".")]
	all_names = [lin[0] for lin in rows]
	to_add = []

	abundances = [float(v) for v in zip(*rows)[1] if v >= 0.0]
	tree = {}
	tree['classes'] = list(set([v[2] for v in rows if len(v)>2]))
	tree['classes'].sort()
	all_nodes = [CladeNode("root."+row[0],float(row[1])) for row in rows]

	depth = max([len(n.name) for n in all_nodes])

	n2 = ["_".join(nn.name) for nn in all_nodes]
	for i,nn in enumerate(all_nodes):
		n = nn
		while "_".join(n.name[:-1]) not in n2 and len(n.name) > 1:
			n = CladeNode(".".join(n.name[:-1]),n.abundance)
			all_nodes.append(n)
			n2.append("_".join(n.name))

	cls2 = []
        if params['all_feats'] != "":
                cls2 = sorted(params['all_feats'].split(":"))
	for i,v in enumerate(rows):
		if len(v)>2:
			if len(cls2) > 0: all_nodes[i].set_color(colors[cls2.index(v[2])%len(colors)])
			else: 
				if v[2].count('rgbcol') > 0:
					ccc = [float(tt) for tt in v[2].split('_')[1:]]
					all_nodes[i].set_color(ccc)
				else: all_nodes[i].set_color(colors[sorted(tree['classes']).index(v[2])%len(colors)])	
	root = CladeNode("root",-1.0)
	root.set_pos((0.0,0.0))

	build_tree(root,all_nodes,0,depth,params['expand_void_lev']==1)

	all_nodes = get_all_nodes(root)
	
	tree['root'] = root
	tree['max_abs'] = max(abundances)
	tree['min_abs'] = min(abundances)
	levs = []
	for i in range(depth):
		depthi = [n for n in all_nodes if len(n.name) == i+1]
		levs.append(len(depthi))
	tree['nlev'] = levs
	return tree

def add_all_pos(father,n,distn,seps,tsep,mlev,last_leaf=-1,nc=1):
	children = father.get_children()
	leaves = True if children[0].isleaf else False
	for i,child in enumerate(children):
		if leaves:
			n += 1.0
			men = 0.5 if len(children) == 1 else 0.0
			child.set_pos((n*distn-men*float(distn)+tsep,(len(father.name))/float(mlev-1)))
			if last_leaf != -1:
				child.prev_leaf = last_leaf
				last_leaf.next_leaf = child
			last_leaf = child
		else:
			ln = n
			ltsep = tsep 
			n,tsep,last_leaf = add_all_pos(child,n,distn,seps,tsep,mlev,last_leaf,len(children))
			nn = (ln + n)*0.5*distn
			ssep = (ltsep + tsep)*0.5
			if n-ln == 1:
				ssep = ltsep
			child.set_pos((nn+ssep,(len(father.name))/float(mlev-1)))
	tsep += seps[len(father.name)-1]
	return n,tsep,last_leaf

def plot_points(father,params,pt_scale,ax):
	children = father.get_children()
	children.sort(key = lambda a: -int(a.get_color() == 'y')*a.abundance)
	x,r = father.pos[0], father.pos[1]
	for i,child in enumerate(children):
		xc,rc = plot_points(child,params,pt_scale,ax)
	if not father.viz: return x,r
	ps = pt_scale[0]+father.abundance/pt_scale[1]+pt_scale[0]
	col = father.get_color()
	pw = params['markeredgewidth'] if col == 'y' else params['markeredgewidth']*3.0
	if x==0 and r==0: ax.plot(x,r, 'o',markersize=ps,color=col,markeredgewidth=0.01,markeredgecolor=params['fore_color'])
	else: ax.plot(x,r, 'o',markersize=ps,color=col,markeredgewidth=pw,markeredgecolor=params['fore_color'])
	return x,r

def plot_lines(father,params,depth,ax,xf):
	children = father.get_children()
	x,r = father.pos[0], father.pos[1]
	for i,child in enumerate(children):
		xc,rc = plot_lines(child,params,depth,ax,x)
		if i == 0: x_first, r_first = xc, rc
		if len(father.name) >= depth-params['radial_start_lev']: 
			col = params['fore_color'] 
			lw=params['parents_connector_width']
			if not child.viz: continue
			if father.get_color() != 'y' and father.get_color() == child.get_color() and params['colored_connectors']:
				col = child.get_color()
				lw *=2.5
			if col != params['fore_color']:
				ax.plot([x,xc],[r,rc],"-",color=params['fore_color'],lw=lw*1.5) 
			ax.plot([x,xc],[r,rc],"-",color=col,lw=lw)
	
	if not father.viz or (len(children) == 1 and not children[0].viz): return x,r 
	if len(father.name) < depth-params['radial_start_lev']:
		col = params['fore_color'] 
		lw=params['parents_connector_width']
		if father.get_color() != 'y':
			f =True
			for child in children:
				if child.get_color() != father.get_color() or not params['colored_connectors']:
					f = False
					break
			if f: 
				col = father.get_color()
				lw *= 2.5 
		if not (x==0 and r==0):
			xx = xc if len(children) > 0 else x
			if len(children) == 0: rc = r
			xt = x if len(children)>1 else xx 
			if col != params['fore_color']:
				ax.plot([x,xt],[r,rc],"-",color=params['fore_color'],lw=lw*1.5)
			ax.plot([x,xt],[r,rc],"-",color=col,lw=lw)
	if len(children) > 0 and 1 < len(father.name) < depth-params['radial_start_lev']:
		xs = arange(x_first,xc,0.01)
		ys = [rc for t in xs]
		ax.plot(xs,ys,"-",color=col,lw=params['siblings_connector_width'],markeredgecolor=params['fore_color'])
	return x,r 

def uniqueid():
	for l in string.lowercase: yield l
	for l in string.lowercase:
		for i in range(10):
			yield l+str(i)
	i = 0
   	while True:
		yield str(i)
		i += 1

def plot_names(father,params,depth,ax,u_i,seps):
	children = father.get_children()
	l = len(father.name)
	if len(children)==0:
		if father.prev_leaf == -1 or father.next_leaf == -1:
			fr_0, fr_1 = father.pos[0], father.pos[0]
		else: fr_0, fr_1 =  (father.pos[0]+father.prev_leaf.pos[0])*0.5, (father.pos[0]+father.next_leaf.pos[0])*0.5
        for i,child in enumerate(children):
                fr,to = plot_names(child,params,depth,ax,u_i,seps)
                if i == 0: fr_0 = fr
		fr_1 = to 
        if father.get_color() != 'y' and params['labeled_start_lev'] < l <= params['labeled_stop_lev']+1:
                col = father.get_color()
		dd = params['labeled_stop_lev'] - params['labeled_start_lev'] + 1 
		de = depth - 1
		dim = 1.0/float(de)
		perc_ext = 0.65 if dim > 0.1 else 1.0 
		clto = (de-l+1)*dim+dim*(dd+1-(l-dd-1))*perc_ext
		clto = (de-l+1)*dim+dim*(dd-(l-params['labeled_start_lev'])+1)*perc_ext
		des = float(180.0*(fr_0+fr_1)/np.pi)*0.5-90
		lab = ""
		txt = father.last_name
		if params['abrv_start_lev']  < l <= params['abrv_stop_lev'] + 1:
			ide = u_i.next()
			lab = str(ide)+": "+father.last_name 
			txt = str(ide)
#		ax.bar(fr_0, clto, width = fr_1-fr_0, bottom = float(l-1)/float(depth-1), alpha = params['alpha'], color=col, edgecolor=col)
		ax.bar(fr_0, clto, width = fr_1-fr_0, bottom = float(l-1)/float(de), alpha = params['alpha'], color=col, edgecolor=col)
		ax.bar(0.0, 0.0, width = 0.0, bottom = 0.0, alpha = 1.0, color=col, edgecolor=params['fore_color'],  label=lab)
		if l <= params['abrv_stop_lev'] + 1:
			if not params['col_lab']: col = params['fore_color']
			else: 
				if col not in colors: col = params['fore_color']
				else: col = dark_colors[colors.index(col)%len(dark_colors)]
			ax.text((fr_0+fr_1)*0.5, clto+float(l-1)/float(de)-dim*perc_ext/2.0, txt, size = params['label_font_size'], rotation=des, ha ="center", va="center", color=col)	
        return fr_0, fr_1

def draw_tree(out_file,tree,params):
	plt_size = 7
	nlev = tree['nlev']
	pt_scale = (params['min_point_size'],max(1.0,((tree['max_abs']-tree['min_abs']))/(params['max_point_size']-params['min_point_size'])))
	depth = len(nlev)
	sep = (2.0*np.pi)/float(nlev[-1]) 
	seps = [params['clade_sep']*sep/float(depth-i+1) for i in range(1,len(tree['nlev'])+1)]
	totseps = sum([s*nlev[i] for i,s in enumerate(seps[:-1])])
	clade_sep_err = True if totseps > np.pi else False
	while totseps > np.pi:
		params['clade_sep'] *= 0.75 	 
		seps = [params['clade_sep']*sep/(float(depth-i+1)*0.25) for i in range(1,len(tree['nlev'])+1)]
		totseps = sum([s*nlev[i] for i,s in enumerate(seps[:-1])])
	if clade_sep_err: print 'clade_sep parameter too large, lowered to',params['clade_sep']

	fig = plt.figure(edgecolor=params['back_color'],facecolor=params['back_color'])
	ax = fig.add_subplot(111, polar=True, frame_on=False, axis_bgcolor=params['back_color'] )
	plt.subplots_adjust(right=1.0-params['r_prop'],left=params['l_prop']) 	
	ax.grid(False)
	xticks([])
	yticks([])

	ds = (2.0*np.pi-totseps)/float(nlev[-1])

	add_all_pos(tree['root'],0.0,ds,seps,0.0,depth)
	
	plot_lines(tree['root'],params,depth,ax,0)
	plot_points(tree['root'],params,pt_scale,ax)
	plot_names(tree['root'],params,depth,ax,uniqueid(),seps)

	r = np.arange(0, 3.0, 0.01)
	theta = 2*np.pi*r
	
	def get_col_attr(x):
    		return hasattr(x, 'set_color') and not hasattr(x, 'set_facecolor')

	h, l = ax.get_legend_handles_labels()
	if len(l) > 0:
		leg = ax.legend(bbox_to_anchor=(1.05, 1), frameon=False, loc=2, borderaxespad=0.,prop={'size':params['label_font_size']})
		if leg != None:
			gca().add_artist(leg)
			for o in leg.findobj(get_col_attr):
	                        o.set_color(params['fore_color'])
	
	cll = sorted(tree['classes']) if params['all_feats'] == "" else sorted(params['all_feats'].split(":"))
	nll = [ax.bar(0.0, 0.0, width = 0.0, bottom = 0.0, color=colors[i%len(colors)], label=c) for i,c in enumerate(cll) if c in tree['classes']]
	cl = [c for c in cll if c in tree['classes']]

	ax.set_title(params['title'],size=params['title_font_size'],color=params['fore_color'])

	if params['class_legend_vis']:
		l2 = legend(nll, cl, loc=2, prop={'size':params['class_legend_font_size']}, frameon=False)
		if l2 != None:
			for o in l2.findobj(get_col_attr):
    				o.set_color(params['fore_color'])

	plt.savefig(out_file,format=params['format'],facecolor=params['back_color'],edgecolor=params['fore_color'],dpi=params['dpi'])
	plt.close()	

if __name__ == '__main__':
	params = read_params(sys.argv)
	params['fore_color'] = 'w' if params['back_color'] == 'k' else 'k'
	clad_tree = read_data(params['input_file'],params)	
	draw_tree(params['output_file'],clad_tree,params)