[英]How do you set the axes on a histogram and swap the x and y axes?
I have a dataset where I want to plot a histogram of the number of measurements at each depth. 我有一个数据集,我想绘制每个深度的测量数量的直方图。 I want to plot a histogram of each the frequency of measurements in the depth column.
我想绘制深度列中每个测量频率的直方图。 I want to bin the data into 5m chuncks starting at 0m, going up to 155m.
我希望将数据从0m开始分成5m的块,最高可达155m。 This code, gets me a histogram, which looks a reasonable shape, but the values seem wrong, and I can't quite get it to start at 0. In addition, I would like to be able to swap the x-axis and y-axis, so that depth is on the y-axis, and frequency, is on the x-axis.
这个代码,给我一个直方图,它看起来是一个合理的形状,但值似乎是错误的,我不能让它从0开始。另外,我希望能够交换x轴和y -axis,使深度在y轴上,频率在x轴上。
import numpy as np
import datetime as dt
import matplotlib.pyplot as plt
import glob
#The data is read in, and then formatted so that an array Dout (based on depth) is created. This is done since multiple files will be read into the code, and so I can create the histogram for all the files I have up until this point.
Dout = np.array(depthout)
bins = np.linspace(0, 130, num=13) #, endpoint=True, retstep=False)
plt.hist(Dout, bins)
plt.xlabel('Depth / m')
plt.ylabel('Frequency')
plt.show()
# the end
The data is in this format: 数据采用以下格式:
TagID ProfileNo ProfileDirn DateTime Lat Lon Depth Temperature
You want the orientation
kwarg of hist
( Docs ). 你想要
hist
( Docs )的orientation
kwarg。
import matplotlib.pyplot as plt
import numpy as np
fig, ax = plt.subplots()
data = np.random.randn(1500)
bins = np.linspace(-5, 5, 25, endpoint=True)
ax.hist(data, bins, orientation='horizontal')
ax.set_ylim([-5, 5])
plt.show()
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