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+--- Thread: Python graphics (/thread-34832.html)
Python graphics - kaltenherz - Sep-04-2021
I just started learning graphing in python and I don't understand what the problem is
import numpy as np import matplotlib.pyplot as plt a = np.arange(1, 50, 1) TTT = 100 + 4*a + 0.25*a*a FFF = 100 + a*0 VVV = 4*a+0,25*a*a plt.plot(a, TTT) plt.plot(a, FFF) plt.plot(a, VVV) plt.show()An error like this is displayed:
Traceback (most recent call last):
File "C:/Users/Кирилл/Desktop/График.py", line 14, in <module>
plt.plot(a, VVV)
File "C:\Users\Кирилл\AppData\Local\Programs\Python\Python39\lib\site-packages\matplotlib\pyplot.py", line 3019, in plot
return gca().plot(
File "C:\Users\Кирилл\AppData\Local\Programs\Python\Python39\lib\site-packages\matplotlib\axes\_axes.py", line 1605, in plot
lines = [*self._get_lines(*args, data=data, **kwargs)]
File "C:\Users\Кирилл\AppData\Local\Programs\Python\Python39\lib\site-packages\matplotlib\axes\_base.py", line 315, in __call__
yield from self._plot_args(this, kwargs)
File "C:\Users\Кирилл\AppData\Local\Programs\Python\Python39\lib\site-packages\matplotlib\axes\_base.py", line 501, in _plot_args
raise ValueError(f"x and y must have same first dimension, but "
ValueError: x and y must have same first dimension, but have shapes (49,) and (2, 49)
RE: Python graphics - jefsummers - Sep-05-2021
What are you expecting VVV to be? It is a tuple, containing two arrays. So you are then trying to plot that tuple of 2 arrays against a. I doubt this is what you meant to do.
Change the comma in line 7 to a decimal point. I think that is what you want.