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https://github.com/SheffieldML/GPy.git
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Merge branch 'mrd' into devel
This commit is contained in:
Max Zwiessele
commit
3bb42481be
3 changed files with 34 additions and 168 deletions
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@ -118,9 +118,9 @@ def swiss_roll(optimize=True, N=1000, M=15, Q=4, sigma=.2, plot=False):
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return m
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def BGPLVM_oil(optimize=True, N=100, Q=5, M=25, max_f_eval=4e3, plot=False, **k):
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np.random.seed(0)
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data = GPy.util.datasets.oil()
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from GPy.core.transformations import logexp_clipped
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np.random.seed(0)
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# create simple GP model
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kernel = GPy.kern.rbf(Q, ARD=True) + GPy.kern.bias(Q, np.exp(-2)) + GPy.kern.white(Q, np.exp(-2))
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@ -131,8 +131,7 @@ def BGPLVM_oil(optimize=True, N=100, Q=5, M=25, max_f_eval=4e3, plot=False, **k)
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m = GPy.models.Bayesian_GPLVM(Yn, Q, kernel=kernel, M=M, **k)
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m.data_labels = data['Y'][:N].argmax(axis=1)
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# m.constrain('variance', logexp_clipped())
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# m.constrain('length', logexp_clipped())
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m.constrain('variance|leng', logexp_clipped())
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m['lengt'] = m.X.var(0).max() / m.X.var(0)
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m['noise'] = Yn.var() / 100.
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@ -140,10 +139,6 @@ def BGPLVM_oil(optimize=True, N=100, Q=5, M=25, max_f_eval=4e3, plot=False, **k)
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# optimize
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if optimize:
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# m.unconstrain('noise'); m.constrain_fixed('noise')
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# m.optimize('scg', messages=1, max_f_eval=200)
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# m.unconstrain('noise')
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# m.constrain('noise', logexp_clipped())
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m.optimize('scg', messages=1, max_f_eval=max_f_eval)
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if plot:
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@ -155,11 +150,6 @@ def BGPLVM_oil(optimize=True, N=100, Q=5, M=25, max_f_eval=4e3, plot=False, **k)
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lvm_visualizer = GPy.util.visualize.lvm_dimselect(m.X[0, :].copy(), m, data_show, latent_axes=latent_axes) # , sense_axes=sense_axes)
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raw_input('Press enter to finish')
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plt.close('all')
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# # plot
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# print(m)
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# m.plot_latent(labels=m.data_labels)
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# pb.figure()
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# pb.bar(np.arange(m.kern.D), 1. / m.input_sensitivity())
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return m
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def oil_100():
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@ -189,15 +179,6 @@ def _simulate_sincos(D1, D2, D3, N, M, Q, plot_sim=False):
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s3 = s3(x)
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sS = sS(x)
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# s1 -= s1.mean()
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# s2 -= s2.mean()
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# s3 -= s3.mean()
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# sS -= sS.mean()
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# s1 /= .5 * (np.abs(s1).max() - np.abs(s1).min())
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# s2 /= .5 * (np.abs(s2).max() - np.abs(s2).min())
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# s3 /= .5 * (np.abs(s3).max() - np.abs(s3).min())
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# sS /= .5 * (np.abs(sS).max() - np.abs(sS).min())
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S1 = np.hstack([s1, sS])
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S2 = np.hstack([s2, sS])
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S3 = np.hstack([s3, sS])
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@ -217,16 +198,17 @@ def _simulate_sincos(D1, D2, D3, N, M, Q, plot_sim=False):
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Y2 /= Y2.std(0)
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Y3 /= Y3.std(0)
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slist = [s1, s2, s3, sS]
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slist = [sS, s1, s2, s3]
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slist_names = ["sS", "s1", "s2", "s3"]
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Ylist = [Y1, Y2, Y3]
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if plot_sim:
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import pylab
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import itertools
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fig = pylab.figure("MRD Simulation", figsize=(8, 6))
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fig = pylab.figure("MRD Simulation Data", figsize=(8, 6))
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fig.clf()
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ax = fig.add_subplot(2, 1, 1)
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labls = sorted(filter(lambda x: x.startswith("s"), locals()))
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labls = slist_names
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for S, lab in itertools.izip(slist, labls):
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ax.plot(S, label=lab)
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ax.legend()
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@ -250,7 +232,6 @@ def bgplvm_simulation_matlab_compare():
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from GPy.models import mrd
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from GPy import kern
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reload(mrd); reload(kern)
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# k = kern.rbf(Q, ARD=True) + kern.bias(Q, np.exp(-2)) + kern.white(Q, np.exp(-2))
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k = kern.linear(Q, ARD=True) + kern.bias(Q, np.exp(-2)) + kern.white(Q, np.exp(-2))
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m = Bayesian_GPLVM(Y, Q, init="PCA", M=M, kernel=k,
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# X=mu,
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@ -260,26 +241,14 @@ def bgplvm_simulation_matlab_compare():
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m.auto_scale_factor = True
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m['noise'] = Y.var() / 100.
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m['linear_variance'] = .01
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# lscstr = 'X_variance'
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# m[lscstr] = .01
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# m.unconstrain(lscstr); m.constrain_fixed(lscstr, .1)
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# cstr = 'white'
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# m.unconstrain(cstr); m.constrain_bounded(cstr, .01, 1.)
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# cstr = 'noise'
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# m.unconstrain(cstr); m.constrain_bounded(cstr, .01, 1.)
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return m
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def bgplvm_simulation(burnin='scg', plot_sim=False,
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max_burnin=100, true_X=False,
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do_opt=True,
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max_f_eval=1000):
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def bgplvm_simulation(optimize='scg',
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plot=True,
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max_f_eval=2e4):
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from GPy.core.transformations import logexp_clipped
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D1, D2, D3, N, M, Q = 15, 8, 8, 350, 3, 6
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slist, Slist, Ylist = _simulate_sincos(D1, D2, D3, N, M, Q, plot_sim)
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D1, D2, D3, N, M, Q = 15, 8, 8, 100, 3, 5
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slist, Slist, Ylist = _simulate_sincos(D1, D2, D3, N, M, Q, plot)
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from GPy.models import mrd
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from GPy import kern
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@ -289,94 +258,22 @@ def bgplvm_simulation(burnin='scg', plot_sim=False,
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Y = Ylist[0]
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k = kern.linear(Q, ARD=True) + kern.bias(Q, np.exp(-2)) + kern.white(Q, np.exp(-2)) # + kern.bias(Q)
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# k = kern.white(Q, .00001) + kern.bias(Q)
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m = Bayesian_GPLVM(Y, Q, init="PCA", M=M, kernel=k, _debug=True)
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# m.set('noise',)
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m.constrain('variance', logexp_clipped())
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m.ensure_default_constraints()
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m.constrain('variance|noise', logexp_clipped())
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# m.ensure_default_constraints()
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m['noise'] = Y.var() / 100.
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m['linear_variance'] = .001
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# m.auto_scale_factor = True
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# m.scale_factor = 1.
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m['linear_variance'] = .01
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if burnin:
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print "initializing beta"
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cstr = "noise"
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m.unconstrain(cstr); m.constrain_fixed(cstr, Y.var() / 70.)
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m.optimize(burnin, messages=1, max_f_eval=max_burnin)
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print "releasing beta"
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cstr = "noise"
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m.unconstrain(cstr); m.constrain_positive(cstr)
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if true_X:
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true_X = np.hstack((slist[0], slist[3], 0. * np.ones((N, Q - 2))))
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m.set('X_\d', true_X)
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m.constrain_fixed("X_\d")
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cstr = 'X_variance'
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# m.unconstrain(cstr), m.constrain_fixed(cstr, .0001)
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m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-7, .1)
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# cstr = 'X_variance'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-3, 1.)
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# m['X_var'] = np.ones(N * Q) * .5 + np.random.randn(N * Q) * .01
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# cstr = "iip"
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# m.unconstrain(cstr); m.constrain_fixed(cstr)
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# cstr = 'variance'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-10, 1.)
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# cstr = 'X_\d'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, -10., 10.)
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#
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# cstr = 'noise'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-5, 1.)
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#
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# cstr = 'white'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-6, 1.)
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#
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# cstr = 'linear_variance'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-10, 10.)
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# cstr = 'variance'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-10, 10.)
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# np.seterr(all='call')
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# def ipdbonerr(errtype, flags):
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# import ipdb; ipdb.set_trace()
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# np.seterrcall(ipdbonerr)
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if do_opt and burnin:
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try:
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m.optimize(burnin, messages=1, max_f_eval=max_f_eval)
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except:
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pass
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finally:
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return m
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if optimize:
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print "Optimizing model:"
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m.optimize('scg', max_iters=max_f_eval, max_f_eval=max_f_eval, messages=True)
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if plot:
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import pylab
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m.plot_X_1d()
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pylab.figure(); pylab.axis(); m.kern.plot_ARD()
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return m
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def mrd_simulation(plot_sim=False):
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# num = 2
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# ard1 = np.array([1., 1, 0, 0], dtype=float)
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# ard2 = np.array([0., 1, 1, 0], dtype=float)
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# ard1[ard1 == 0] = 1E-10
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# ard2[ard2 == 0] = 1E-10
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# ard1i = 1. / ard1
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# ard2i = 1. / ard2
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# k = GPy.kern.rbf(Q, ARD=True, lengthscale=ard1i) + GPy.kern.bias(Q, 0) + GPy.kern.white(Q, 0.0001)
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# Y1 = np.random.multivariate_normal(np.zeros(N), k.K(X), D1).T
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# Y1 -= Y1.mean(0)
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#
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# k = GPy.kern.rbf(Q, ARD=True, lengthscale=ard2i) + GPy.kern.bias(Q, 0) + GPy.kern.white(Q, 0.0001)
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# Y2 = np.random.multivariate_normal(np.zeros(N), k.K(X), D2).T
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# Y2 -= Y2.mean(0)
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# make_params = lambda ard: np.hstack([[1], ard, [1, .3]])
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D1, D2, D3, N, M, Q = 150, 250, 300, 700, 3, 7
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slist, Slist, Ylist = _simulate_sincos(D1, D2, D3, N, M, Q, plot_sim)
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@ -386,50 +283,16 @@ def mrd_simulation(plot_sim=False):
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reload(mrd); reload(kern)
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# k = kern.rbf(2, ARD=True) + kern.bias(2) + kern.white(2)
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# Y1 = np.random.multivariate_normal(np.zeros(N), k.K(S1), D1).T
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# Y2 = np.random.multivariate_normal(np.zeros(N), k.K(S2), D2).T
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# Y3 = np.random.multivariate_normal(np.zeros(N), k.K(S3), D3).T
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# Ylist = Ylist[0:2]
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# k = kern.rbf(Q, ARD=True) + kern.bias(Q) + kern.white(Q)
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k = kern.linear(Q, [0.01] * Q, True) + kern.bias(Q, np.exp(-2)) + kern.white(Q, np.exp(-2))
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m = mrd.MRD(*Ylist, Q=Q, M=M, kernel=k, initx="concat", initz='permute', _debug=False)
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m = mrd.MRD(*Ylist, Q=Q, M=M, kernel=k, initx="concat", initz='permute')
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for i, Y in enumerate(Ylist):
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m['{}_noise'.format(i + 1)] = Y.var() / 100.
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m.constrain('variance', logexp_clipped())
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m.constrain('variance|noise', logexp_clipped())
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m.ensure_default_constraints()
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# m.auto_scale_factor = True
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# cstr = 'variance'
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# m.unconstrain(cstr), m.constrain_bounded(cstr, 1e-12, 1.)
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#
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# cstr = 'linear_variance'
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# m.unconstrain(cstr), m.constrain_positive(cstr)
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print "initializing beta"
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cstr = "noise"
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m.unconstrain(cstr); m.constrain_fixed(cstr)
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m.optimize('scg', messages=1, max_f_eval=2e3, gtol=100)
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print "releasing beta"
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cstr = "noise"
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m.unconstrain(cstr); m.constrain(cstr, logexp_clipped())
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# np.seterr(all='call')
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# def ipdbonerr(errtype, flags):
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# import ipdb; ipdb.set_trace()
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# np.seterrcall(ipdbonerr)
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return m # , mtest
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def mrd_silhouette():
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pass
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return m
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def brendan_faces():
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from GPy import kern
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@ -154,5 +154,6 @@ def SCG(f, gradf, x, optargs=(), maxiters=500, max_f_eval=500, display=True, xto
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# iterations.
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status = "maxiter exceeded"
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if display:
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print ""
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return x, flog, function_eval, status
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@ -208,19 +208,21 @@ class Bayesian_GPLVM(sparse_GP, GPLVM):
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else:
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colors = iter(colors)
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plots = []
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x = np.arange(self.X.shape[0])
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for i in range(self.X.shape[1]):
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if axes is None:
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ax = fig.add_subplot(self.X.shape[1], 1, i + 1)
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else:
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ax = axes[i]
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ax.plot(self.X, c='k', alpha=.3)
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plots.extend(ax.plot(self.X.T[i], c=colors.next(), label=r"$\mathbf{{X_{{{}}}}}$".format(i)))
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ax.fill_between(np.arange(self.X.shape[0]),
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plots.extend(ax.plot(x, self.X.T[i], c=colors.next(), label=r"$\mathbf{{X_{{{}}}}}$".format(i)))
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ax.fill_between(x,
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self.X.T[i] - 2 * np.sqrt(self.X_variance.T[i]),
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self.X.T[i] + 2 * np.sqrt(self.X_variance.T[i]),
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facecolor=plots[-1].get_color(),
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alpha=.3)
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ax.legend(borderaxespad=0.)
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ax.set_xlim(x.min(), x.max())
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if i < self.X.shape[1] - 1:
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ax.set_xticklabels('')
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pylab.draw()
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