我想知道我怎麼可以明確地設定一個彩條對象的格式matplotlibmatplotlib彩條刻度標籤格式
下面是一個例子繪製腳本:
from matplotlib import pyplot
from matplotlib.ticker import MultipleLocator, FormatStrFormatter
from matplotlib.colors import BoundaryNorm
from matplotlib.ticker import MaxNLocator
from pylab import *
import numpy as np
import random
# ----------
plot_aspect = 1.2
plot_height = 10.0
plot_width = int(plot_height*plot_aspect)
# ----------
pyplot.figure(figsize=(plot_width, plot_height), dpi=100)
pyplot.subplots_adjust(left=0.10, right=1.00, top=0.90, bottom=0.06, hspace=0.30)
subplot1 = pyplot.subplot(111)
# ----------
cbar_max = 40.0
cbar_min = 20.0
cbar_step = 1.0
cbar_num_colors = 200
cbar_num_format = "%d"
# ----------
# make random dataset
dx, dy = 5.0, 5.0
y, x = np.mgrid[slice(-100.0, 100.0 + dy, dy),slice(-100.0, 100.0 + dx, dx)]
z = []
for i in x:
z.append([])
for j in y:
z[-1].append(random.uniform(cbar_min,cbar_max))
# ----------
# make random dataset
levels = MaxNLocator(nbins=cbar_num_colors).tick_values(cbar_min, cbar_max)
cmap = pyplot.get_cmap('gist_ncar')
norm = BoundaryNorm(levels, ncolors=cmap.N, clip=True)
pp = pyplot.contourf(x,y,z,levels=levels,cmap=cmap)
cbar = pyplot.colorbar(pp, orientation='vertical', ticks=np.arange(cbar_min, cbar_max+cbar_step, cbar_step), format=cbar_num_format)
cbar.ax.set_ylabel('Color Scale [unit]', fontsize = 16, weight="bold")
CS = pyplot.contour(x,y,z, alpha=0.5)
majorLocator1 = MultipleLocator(10)
majorFormatter1 = FormatStrFormatter('%d')
minorLocator1 = MultipleLocator(5)
subplot1.xaxis.set_major_locator(majorLocator1)
subplot1.xaxis.set_major_formatter(majorFormatter1)
subplot1.xaxis.set_minor_locator(minorLocator1)
pyplot.xticks(fontsize = 16)
pyplot.xlim(-100.0,100.0)
majorLocator2 = MultipleLocator(10)
majorFormatter2 = FormatStrFormatter('%d')
minorLocator2 = MultipleLocator(5)
subplot1.yaxis.set_major_locator(majorLocator2)
subplot1.yaxis.set_major_formatter(majorFormatter2)
subplot1.yaxis.set_minor_locator(minorLocator2)
pyplot.yticks(fontsize = 16)
pyplot.ylim(-100.0,100.0)
subplot1.xaxis.grid()
subplot1.yaxis.grid()
subplot1.axes.set_aspect('equal')
pyplot.suptitle('Main Title', fontsize = 24, weight="bold")
pyplot.xlabel('X [unit]', fontsize=16, weight="bold")
pyplot.ylabel('Y [unit]', fontsize=16, weight="bold")
pyplot.show()
pyplot.close()
這使我的輸出是這樣的:
目前,彩條刻度標記的格式將使用以前提供的格式字符串:cbar_num_format = "%d"
,但是我想也設置使用字體大小和重量:
cbar.ax.set_yticklabels(np.arange(cbar_min, cbar_max+cbar_step, cbar_step), fontsize=16, weight='bold')
...但我這樣做的時候,以前應用的格式化字符串似乎消失和數字回到了"%0.1f"
格式而不是我在前面所施加的"%d"
:
我怎樣才能防止這種情況發生或者以更好的方式控制彩條刻度標記?
[ '{:.0f}'。格式(X)爲X的......似乎沒有工作,但[ (「%d」%x)for x in ... does!也許它是一個版本差異? – HotDogCannon
它可能是一個版本差異你使用的是什麼Python版本? – GWW
我使用的版本2.6.6 – HotDogCannon