Je suis dans une classe de laboratoire de physique et nous devons écrire du code pour analyser certaines données que nous avons collectées. Ma question est simple et probablement stupide mais je me demandais juste comment tracer un graphique au-dessus d'un autre graphique en utilisant python. Voici mon code jusqu'à présent merciImposer un graphe sur un autre
%pylab
import numpy as np
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt
#SIGNAL DATA
dataSig = [658, 679, 683, 691, 693, 693, 695, 696, 696, 696, 697, 699, 699, 700, 700, 700, 702, 703, 703, 704, 706, 706, 708, 708, 709, 709, 712, 712, 713, 714, 714, 715, 715, 715, 716, 716, 716, 717, 717, 717, 718, 718, 718, 718, 719, 720, 720, 721, 721, 721, 722, 723, 723, 724, 725, 725, 725, 726, 726, 726, 727, 727, 728, 728, 729, 730, 730, 731, 731, 731, 731, 732, 732, 733, 734, 734, 734, 734, 735, 736, 737, 738, 738, 738, 738, 740, 740, 741, 741, 741, 742, 743, 743, 743, 743, 743, 743, 743, 744, 744, 745, 746, 746, 746, 746, 747, 747, 747, 747, 748, 749, 749, 750, 750, 750, 750, 751, 751, 751, 751, 752, 752, 752, 754, 754, 756, 756, 757, 757, 757, 759, 759, 760, 760, 760, 762, 762, 762, 762, 762, 762, 763, 764, 765, 765, 765, 765, 766, 766, 766, 767, 767, 768, 769, 769, 770, 770, 771, 773, 775, 776, 780, 786, 786, 786, 787, 790, 790, 793, 796, 797, 798, 817, 823]
#[658,679,683,691,693,695,696,697,699,700,702,703,704,706,708,709,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,735,736,737,738,740,741,742,743,744,745,746,747,748,749,750,751,752,754,756,757,759,760,762,763,764,765,766,767,768,769,770,771,773,775,776,780,786,787,790,793,796,797,798,817,823] #[1,1,1,1,1,1,3,1,2,3,1,2,1,2,2,1,2,1,2,3,2,3,3,1,2,3,1,2,1,3,3,2,2,1,1,4,2,1,4,1,1,1,4,2,3,1,7,2,1,4,4,1,2,4,4,3,2,2,2,2,3,6,1,1,4,3,2,1,2,2,1,1,1,1,1,3,1,2,1,1,1,1,1,1]
#SIGNAL DEFINED VARIABLES
ntestpoints = 175
themean = 739.1
#sigma = ?
#amp = center/guassian
#SIGNAL GAUSSIAN FITTING FUNCTION
def mygauss(x, amp, center, sigma):
"""This is an example gaussian function, which takes in x values, the amplitude (amp),
the center x value (center) and the sigma of the Gaussian, and returns the respective y values."""
y = amp * np.exp(-.5*((x-center)/sigma)**2)
return y
#SIGNAL PLOT, NO GAUSS
plt.figure(figsize=(10,6))
plt.hist(dataSig,bins=ntestpoints/10,histtype="stepfilled",alpha=.5,color='g',range=[600,900])
plt.xlabel('Number of Counts/Second',fontsize=20)
plt.ylabel('Number of Measurements',fontsize=20)
plt.title('Measured Signal Count Rate Fitting with Gaussian Function',fontsize=22)
plt.axvline(themean,linestyle='-',color='r')
#plt.axvline(themean+error_on_mean,linestyle='--',color='b')
#plt.axvline(themean-error_on_mean,linestyle='--',color='b')
#plt.axvline(testmean,color='k',linestyle='-')
plt.show()
#------------------------------------------------------------
# define a function to make a gaussian with input values, used later
def mygauss(x, amp, center, sigma):
"""This is an example gaussian function, which takes in x values, the amplitude (amp),
the center x value (center) and the sigma of the Gaussian, and returns the respective y values."""
y = amp * np.exp(-.5*((x-center)/sigma)**2)
return y
npts = 40 # the number of points on the x axis
x = np.linspace(600,900,npts) # make a series of npts linearly spaced values between 0 and 10
amp = 40
center = 740.5
sigma = 40
y = mygauss(x, amp, center, sigma)
print y
plt.figure(figsize=(10,6))
plt.plot(x,y,'bo', label='data points')
plt.text(center, amp, "<-- peak is here",fontsize=16) # places text at any x/y location on the graph
plt.xlabel('X axis',fontsize=20)
plt.ylabel('Y axis', fontsize=20)
plt.title('A gaussian plot \n with some extras!',fontsize=20)
plt.legend(loc='best')
plt.show()
Que signifie "sur le dessus"? Dans le même système de coordonnées ou sous-tracés dans la même fenêtre image/figure? – LutzL
Comme [this] (http://support.softwarefx.com/media/61d7eaea-4685-e311-84a5-0019b9e6b500/large) –
[Ceci] est un histogramme avec une courbe en cloche de Gauß comme arrière-plan. 'plt.show' montre le canevas actuel du tracé dans une fenêtre graphique et crée un nouveau canevas pour les futures opérations de dessin. – LutzL