我正在绘制(logscale,symlog)数据的图。我很难在 x 轴(对数刻度)上显示具有可见高度和宽度的小刻度。
在 x 轴上,我的值从 1e-8 到 1。一开始,由于我不知道的原因,我只有一个“2 次方 10 次”区间,即我在 x_axis 的图上专业的价值观是这样的:
[1e-8, 1e-6, 1e-4, 1e-2, 1]
我通过明确地解决了这个问题:
# Important otherwise missing ticks
plt.xticks([1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1, 1])
所以现在,我有下图:
如您所见,每个 10 次方的次要刻度都丢失了,我不知道要让它们显示,即使每个 10 次方之间没有太多空间。
这是我用来生成此图的代码:
# Modules import
import sys
import numpy as np
import scipy.integrate as pyint
import os
from os import path
import glob
import scipy
import re
import shutil
import matplotlib.pyplot as plt
from matplotlib import ticker
# Initialize figure
fig = plt.figure(num=None, figsize=(12, 12), facecolor='w', edgecolor='k')
fig.patch.set_facecolor('white')
fig.patch.set_alpha(1)
# Control on graphic
ax = plt.gca()
# Increase space between x-axis and x-label
ax.tick_params(axis = 'x', which = 'major', pad = 15)
# Lebels on axis
plt.xlabel('Step $\Omega_{m}$', fontsize = 20)
plt.ylabel('$C_{\ell}^{\'}$($\Omega_{m}$) relative', fontsize = 20)
plt.xticks(fontsize = 20)
plt.yticks(fontsize = 20)
plt.xscale('log')
plt.grid()
# Important otherwise missing ticks
plt.xticks([1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1, 1])
# Title : different multipoles
string_intel = '(CAMB-0.1.7) - '+type_GG_LL_GL+' - $C_{\ell}^{\'}$ relative of '+paramLatexArray[idParam]+'('+str(der)+' pts) at $z$ = '+str(zrange[idRedshift])+' - '+str(numel)+' pts'
plt.title(string_intel, fontsize = 20, pad = 25)
colorSimplePlot = ['b', 'r', 'g', 'k', 'y', 'm', 'c']
# Plot command
for idMultipole in range(len(multipole)):
plt.plot(stepNewArray[:], eval('matrixCl_der_'+str(der)+'[:, idMultipole, idParam, lx, ly]'), colorSimplePlot[idMultipole])
# Chose if negative or positive derivatives
# Plot with symlog or log along y-axis
# 1) For example : GG at z = 2.038 and l = 366
# needs symlog with lintreshy = 1e-9
# 2) For example : LL at z = 2.038 and l = 366
# needs nothing (even no log)
if (type_GG_LL_GL == 'GG'):
plt.yscale('symlog', linthreshy = 1e-9)
elif (type_GG_LL_GL == 'LL'):
plt.yscale('linear')
# Legend
plt.legend(['$l = 366.42$', '$l = 1079.28$', '$l = 1792.14$', '$l = 2505$',\
'$l = 3217.85$', '$l = 3930.71$', '$l = 4643.57$'], fontsize=15, loc='best')
# Save plot
plt.savefig('Cl_derivative_Omega_m.pdf')
任何人都可以看到我必须做些什么来显示 x 轴对数刻度的每个间隔的次要 xticks ?
我还尝试添加:
from matplotlib import ticker
from matplotlib.ticker import LogLocator
ax.tick_params(axis = 'x', which = 'major', pad = 15)
ax.xaxis.set_major_locator(LogLocator(base=10))
ax.xaxis.set_major_locator(LogLocator(base=10, subs=[1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0]))
但这不起作用...
第二次,我还想控制这些小刻度的大小。
感谢@Quand Huang,我设法完成了下图:
您可以注意到主要刻度线和网格命令已经消失,即在我的代码片段中执行:
minors = (0.1**np.arange(9)[:,None] * np.arange(0.1,1,0.1)).ravel()
plt.yticks(fontsize = 20)
plt.xscale('log')
# Important otherwise missing ticks
plt.xticks([1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1, 1], fontsize = 40)
plt.xticks(minors, fontsize = 20)
plt.grid()
我尝试为手动主要刻度 ( fontsize = 40
) 设置大字体,但它没有出现。顺便问一下,为什么grid
模式消失了?