Python for Operational Research in Healthcare
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1 Python for Operational Research in Healthcare There s a library for PyCon UK 201
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4 Data Sex Height Weight 0 M M F M F
5 Data Sex Height Weight 0 M M F M F >>> import scipy.stats. >>> ttest = scipy.stats.ttest_ind(... df[df['sex']=='m']['height'],... df[df['sex']=='f']['height']) >>> ttest.pvalue
6 Machine Learning >>> from sklearn.cluster import KMeans >>> kmeans = KMeans(n_clusters=, random_state=0) >>> kmeans.fit(df[['height', 'Weight']]) >>> df['cluster'] = kmeans.labels_
7 Machine Learning >>> from sklearn.cluster import KMeans >>> kmeans = KMeans(n_clusters=, random_state=0) >>> kmeans.fit(df[['height', 'Weight']]) >>> df['cluster'] = kmeans.labels_
8 Optimisation Full Time.0 per hour hrs, 1hr break, hrs Part Time per hour hrs
9 x = [F, F 10, F 11, P, P 10, P 11, P 12, P 1, P 2, P ] C = [ 60, 60, 60, 2, 2, 2, 2, 2, 2, 2] A = B = min Cx subject to: Ax B x 0
10 >>> import pulp >>> prob = pulp.lpproblem("nurse Rostering", pulp.lpminimize) >>> x = pulp.lpvariable.dicts("x", range(10), cat=pulp.lpinteger) >>> objective_funtion = sum(c[i] * x[i] for i in range(10)) >>> prob += objective_funtion >>> for j in range(10):... prob += sum(a[j][i] * x[i] for i in range(10)) >= B[j] >>> for j in range(10):... prob += x[j] >= 0 >>> prob.solve() >>> [pulp.value(i) for i in x] [-0.0, 1.0, 2.0,.0, -0.0, -0.0, -0.0,.0, -0.0, 1.0]
11 Graph Theory Treherbert Maerdy Treorchy Ystrad Penrhys Llwynypia Wattstown Tonypandy Penygraig Porth
12 Maerdy Ystrad Wattstown Penrhys Llwynypia Treorchy Penygraig Treherbert Tonypandy Porth
13 >>> import networkx as nx >>> towns = ['Porth', 'Wattstown', 'Penrhys', 'Maerdy',... 'Penygraig', 'Tonypandy', 'Llwynypia',... 'Ystrad', 'Treorchy', 'Treherbert'] >>> D = nx.from_numpy_matrix(distances) >>> D = nx.relabel_nodes(d,... {i: towns[i] for i in range(10)}) >>> ranks = nx.betweenness_centrality(d, weight='weight') >>> max(ranks.keys(), key=lambda x: centrality[x]) 'Ystrad'
14 Simulation High Priority Medium Priority Low Priority 10 per hour per hour 2 per hour 1 2 per hour Gamma(, 0.).0
15 Simulation High Priority Medium Priority Low Priority 10 per hour per hour 2 per hour 1 2 per hour Gamma(, 0.1).0 Lognormal(0, 0.) Lognormal(-1.2, 0.2) Gamma(, 0.)
16 >>> import ciw >>> N = ciw.create_network(... Arrival_distributions={... 'Class 0': [['Exponential', 10.0]],... 'Class 1': [['Exponential',.0]],... 'Class 2': [['Exponential', 2.0]],... 'Class ': [['Exponential', 0.]]},... Service_distributions={... 'Class 0': [['Gamma',, 0.1]],... 'Class 1': [['Lognormal', -1.2, 0.2]],... 'Class 2': [['Lognormal', 0, 0.]],... 'Class ': [['Gamma',, 0.]]},... Number_of_servers=[10],... Priority_classes={... 'Class 0': 2, 'Class 1': 1, 'Class 2': 1, 'Class ': 0... }... ) >>> average_waits = [] >>> for i in range(10):... ciw.seed(1)... Q = ciw.simulation(n)... Q.simulate_until_max_time(0)... recs = Q.get_all_records()... waits = [r.waiting_time for r in recs if r.arrival_date >= 6]... average_waits.append(np.mean(waits)) >>> np.mean(average_waits)
17 System Dynamics Infectious rate Recovery rate + + Susceptible Infected Recovered + + +
18 System Dynamics α β ds dt + S I R dr dt + ds dt = αsi dr dt = βi di dt = ds dt dr dt
19 >>> from scipy.integrate import odeint >>> def dsir(sir, t, a, b):... s, i, r = sir... return -a*s*i, a*s*i - b*i, b*i >>> t = np.linspace(0, 12, 100) >>> a, b = 0.0, 0. >>> sirs = odeint(func=dsir, y0=[, 1, 0], t=t, args=(a, b)) >>> plt.plot(t, sirs) S I R
20 Game Theory K 1? Divert Hospital 2 K 2? Divert Hospital 1
21 K 2 = 0 K 2 = 0 K 2 = 6 K 2 = K 1 = 0 (.6,.6) (60.2,.6) (1., 6.6) (0.0, 11.0) K 1 = 0 (.6, 60.2) (.6,.6) (0.6, 6.) (., 0.) K 1 = 6 (6.6, 1.) (6., 0.6) (.6,.6) (6., 62.) K 1 = (11.0, 0.0) (0.,.) (62., 6.) (.6,.6)
22 K 2 = 0 K 2 = 0 K 2 = 6 K 2 = K 1 = 0 (.6,.6) (60.2,.6) (1., 6.6) (0.0, 11.0) K 1 = 0 (.6, 60.2) (.6,.6) (0.6, 6.) (., 0.) K 1 = 6 (6.6, 1.) (6., 0.6) (.6,.6) (6., 62.) K 1 = (11.0, 0.0) (0.,.) (62., 6.) (.6,.6) >>> import nash >>> g = nash.game(-o1, -O2) >>> eqs = g.support_enumeration() >>> list(eqs) [(array([ 0., 1., 0., 0.]), array([ 0., 1., 0., 0.]))]
23 Newport Older Person s Pathway Analysis A&E Emergency Admission Local Authority Community Care Day/Home Other Royal Gwent Ysbyty Ystrad Fawr Neville Hall Frailty Falls Rapid Medical Rapid Other Reablement Assessed Out Residential CHC
24 pip install pandas==0.1.0 pip install numpy==1.1. pip install matplotlib==2.0.0 pip install scipy==0.1.1 pip install sklearn==0.1.1 pip install pulp==1.6. pip install networkx==1.11 pip install ciw==1.1. pip install Emojis thanks to Twemoji.
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