plotting multiple graph from a csv file and output to a single pdf/svg

Question

I have some csv data in the following format.

Ln    Dr    Tag Lab    0:01    0:02    0:03    0:04    0:05    0:06    0:07    0:08   0:09
L0   St     vT  4R       0       0       0       0       0      0        0       0      0
L2   Tx     st  4R       8       8       8       8       8      8        8       8      8
L2   Tx     ss  4R       1       1       9       6       1      0        0       6      7

I want to plot a timeseries graph using the columns (Ln , Dr, Tg,Lab) as the keys and the 0:0n field as values on a timeseries graph.

I have the following code.

import pandas as pd
import matplotlib.pyplot as plt
import numpy as np

plt.ylabel('time')
plt.xlabel('events')

plt.grid(True)
plt.xlim((0,150))
plt.ylim((0,200))

a=pd.read_csv('yourfile.txt',delim_whitespace=True)
for x in a.iterrows():
    x[1][4:].plot(label=str(x[1][0])+str(x[1][1])+str(x[1][2])+str(x[1][3]))

plt.legend()
fig.savefig('test.pdf')

I have only shown a subset of my data here. I have around 200 entries (200 rows) in my full data set. the above code plots all graphs in a single figure. I would prefer each row to be plotted in a separate graph.

why the negative marking ?

liv2hak
– liv2hak

2015-11-14 20:42:45 +00:00
Commented Nov 14, 2015 at 20:42 — liv2hak
– liv2hak, Commented Nov 14, 2015 at 20:42

KetZoomer · Accepted Answer · 2021-05-02 00:33:44Z

2

Use subplot()

import matplotlib.pyplot as plt

fig = plt.figure()

plt.subplot(221) # 2 rows, 2 columns, plot 1
plt.plot([1,2,3])

plt.subplot(222) # 2 rows, 2 columns, plot 2
plt.plot([3,1,3])

plt.subplot(223) # 2 rows, 2 columns, plot 3
plt.plot([3,2,1])

plt.subplot(224) # 2 rows, 2 columns, plot 4
plt.plot([1,3,1])

plt.show()

fig.savefig('test.pdf')

https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.subplot.html#matplotlib.pyplot.subplot

edited May 2, 2021 at 0:33

KetZoomer

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answered Nov 14, 2015 at 20:54

furas

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2 Comments

liv2hak Over a year ago

what is the list parameter that you pass to plot ?

furas Over a year ago

it is list of points to plot - but you can use x[1][4:].plot()

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