這篇文章給大家分享的是有關(guān)python如何通過文本在一個圖中畫多條線的內(nèi)容。小編覺得挺實用的,因此分享給大家做個參考,一起跟隨小編過來看看吧。
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import matplotlib.pyplot as plt import numpy as np data1 = np.loadtxt('/data_1/SSD/caffe/tools/extra/DSOD300_VOC0712_DSOD300_300x300.log.test') data2 = np.loadtxt('/data_1/SSD/caffe/tools/extra/DSOD300_VOC0712_DSOD300_300x300.log.train') plt.title('Result Analysis') plt.plot(data1[:,0], data1[:,2], color='skyblue', label='y1') plt.plot(data2[:,0], data2[:,3], color='blue', label='y2') plt.legend() plt.xlabel('x') plt.ylabel('y') plt.show()
結(jié)果:
加一些不同形式的線
import matplotlib.pyplot as plt import numpy as np data1 = np.loadtxt('/data_1/project_test/teest1.txt') data2 = np.loadtxt('/data_1/project_test/teest2.txt') data3 = np.loadtxt('/data_1/project_test/teest3.txt') plt.title('Result Analysis') plt.plot(data1[:,0], data1[:,1], color='skyblue', label='y1',ls='-.')#ls或linestyle plt.plot(data2[:,0], data2[:,1], color='green', label='y2',ls=':') plt.plot(data3[:,0], data3[:,1], color='red', label='y3',ls='steps') plt.legend() plt.xlabel('x') plt.ylabel('y') plt.show()
加標記
import matplotlib.pyplot as plt import numpy as np data1 = np.loadtxt('/data_1/project_test/teest1.txt') data2 = np.loadtxt('/data_1/project_test/teest2.txt') data3 = np.loadtxt('/data_1/project_test/teest3.txt') plt.title('Result Analysis') plt.plot(data1[:,0], data1[:,1], color='skyblue', label='y1',ls='-.',marker='*') plt.plot(data2[:,0], data2[:,1], color='green', label='y2',ls=':',marker='+') plt.plot(data3[:,0], data3[:,1], color='red', label='y3',ls='steps',marker='D') plt.legend() plt.xlabel('x') plt.ylabel('y') plt.show()
總結(jié):
linestyle or ls:實線'-' , 破折線'--' , 點劃線'-.' ,虛線':'
plt.plot()參數(shù)設(shè)置
Property Value Type
alpha 控制透明度,0為完全透明,1為不透明
animated [True False]
antialiased or aa [True False]
clip_box a matplotlib.transform.Bbox instance
clip_on [True False]
clip_path a Path instance and a Transform instance, a Patch
color or c 顏色設(shè)置
contains the hit testing function
dash_capstyle [‘butt' ‘round' ‘projecting']
dash_joinstyle [‘miter' ‘round' ‘bevel']
dashes sequence of on/off ink in points
data 數(shù)據(jù)(np.array xdata, np.array ydata)
figure 畫板對象a matplotlib.figure.Figure instance
label 圖示
linestyle or ls 線型風(fēng)格[‘-' ‘–' ‘-.' ‘:' ‘steps' …]
linewidth or lw 寬度float value in points
lod [True False]
marker 數(shù)據(jù)點的設(shè)置[‘+' ‘,' ‘.' ‘1' ‘2' ‘3' ‘4']
markeredgecolor or mec any matplotlib color
markeredgewidth or mew float value in points
markerfacecolor or mfc any matplotlib color
markersize or ms float
markevery [ None integer (startind, stride) ]
picker used in interactive line selection
pickradius the line pick selection radius
solid_capstyle [‘butt' ‘round' ‘projecting']
solid_joinstyle [‘miter' ‘round' ‘bevel']
transform a matplotlib.transforms.Transform instance
visible [True False]
xdata np.array
ydata np.array
zorder any number
補充拓展:python 畫直線和平面實例
畫直線
from mpl_toolkits.axisartist.axislines import SubplotZero import matplotlib.pyplot as plt import numpy as np fig = plt.figure(1) ax = SubplotZero(fig, 111) fig.add_subplot(ax) for direction in ["xzero", "yzero"]: # adds arrows at the ends of each axis ax.axis[direction].set_axisline_style("-|>") # adds X and Y-axis from the origin ax.axis[direction].set_visible(True) for direction in ["left", "right", "bottom", "top"]: # hides borders ax.axis[direction].set_visible(False) plt.text(-2, 2, r"y=kx+b", horizontalalignment='center', fontsize=20) x = np.linspace(-2,2,100) k=-1 b=0 y = k*x + b ax.plot(x, y) plt.show()
畫平面
import matplotlib.pyplot as plt from matplotlib import cm import numpy as np fig = plt.figure() ax = fig.gca(projection='3d') # Make data. X = np.arange(-5, 5, 0.25) Y = np.arange(-5, 5, 0.25) X, Y = np.meshgrid(X, Y) a1 = 2 a2 = 1 Z = a1*X+a2*Y # Plot the surface. surf = ax.plot_surface(X, Y, Z, cmap=cm.Blues, linewidth=0, antialiased=False) ax.set_xlabel(r'$x_1$',fontsize = 20, color = 'blue') ax.set_ylabel(r'$x_2$',fontsize = 20, color = 'blue') ax.set_zlabel(r'$x_3$',fontsize = 20, color = 'blue')
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