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How can write a program to graph two different data (x=data1 & y=data2 )?

+1 vote
asked Dec 5, 2019 by Angel
Hello

I'm making a tool that measure several sensors non stop. I would like to make a graph in real time while the sensors are still measuring, but with recalculated data. The two variables I want to plot in a graph are x=speed and y=force.
Could anyone help me with the code please?

Should I first log some data in a csv file?

How can I make the graph?

1 Answer

+2 votes
answered Dec 11, 2020 by Tushar Khanna (190 points)
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

speed=np.array([1,2,3,4,5])
force=np.array([6,7,8,9,10])

plt.plot(speed,force)

plt.show()
commented Jan 23 by Ubirajara Costa (100 points)
It doesn't work in this environment.
When I try the provided code I keep getting the following:

Traceback (most recent call last):                                                                                                               
  File "main.py", line 1, in <module>                                                                                                            
    import pandas as pd                                                                                                                          
  File "/usr/lib/python3/dist-packages/pandas/__init__.py", line 40, in <module>                                                                 
    from pandas.core.api import *                                                                                                                
  File "/usr/lib/python3/dist-packages/pandas/core/api.py", line 12, in <module>                                                                 
    from pandas.core.series import Series, TimeSeries                                                                                            
  File "/usr/lib/python3/dist-packages/pandas/core/series.py", line 2617, in <module>                                                            
    import pandas.tools.plotting as _gfx                                                                                                         
  File "/usr/lib/python3/dist-packages/pandas/tools/plotting.py", line 23, in <module>                                                           
    import pandas.tseries.converter as conv                                                                                                      
  File "/usr/lib/python3/dist-packages/pandas/tseries/converter.py", line 7, in <module>                                                         
    import matplotlib.units as units                                                                                                             
  File "/usr/lib/python3/dist-packages/matplotlib/__init__.py", line 967, in <module>                                                            
    rcParams = rc_params()                                                                                                                       
  File "/usr/lib/python3/dist-packages/matplotlib/__init__.py", line 876, in rc_params                                                           
    fname = matplotlib_fname()                                                                                                                   
  File "/usr/lib/python3/dist-packages/matplotlib/__init__.py", line 744, in matplotlib_fname                                                    
    configdir = _get_configdir()                                                                                                                 
  File "/usr/lib/python3/dist-packages/matplotlib/__init__.py", line 613, in _get_configdir                                                      
    return _get_config_or_cache_dir(_get_xdg_config_dir())                                                                                       
  File "/usr/lib/python3/dist-packages/matplotlib/__init__.py", line 590, in _get_config_or_cache_dir                                            
    return _create_tmp_config_dir()                                                                                                              
  File "/usr/lib/python3/dist-packages/matplotlib/__init__.py", line 522, in _create_tmp_config_dir                                              
    tempdir = os.path.join(tempdir, 'matplotlib-%s' % getpass.getuser())                                                                         
  File "/usr/lib/python3.4/getpass.py", line 170, in getuser                                                                                     
    return pwd.getpwuid(os.getuid())[0]                                                                                                          
KeyError: 'getpwuid(): uid not found: 14072'                                                                                                     
                                                                                                                                                 
                                                                                                                                                 
...Program finished with exit code 1                                                                                                             
Press ENTER to exit console.
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