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+--- Thread: Substituting Values in Plot (/thread-6217.html)
Substituting Values in Plot - Hotdog1 - Nov-11-2017
I have an equation I need to plot which generates correctly in another program but not in Python. The equation used in the other program is
syms u; %logarithmic variable V1 = %Equation xaxis = logspace(0,4); %makes logarithmic points, until 10E4 yaxis = double(subs(V1,u,xaxis)); %changes values by substituting(((((Not Actually in Python))))
And My Code in python is
import numpy as np
import matplotlib.pyplot as plt
plt.clf()
w = np.linspace(0, 10E4, 10E4)
f1=#eqn
plt.plot(w, f1)
axes = plt.gca()
axes.set_xscale('log')
axes.set_yscale('log')
axes.set_xlim([0, 10E4])
axes.set_ylim([0, 10E4])
plt.show()The problem I am having is the substitution, in the first program it does a substitution in the equation but my python program does not do so and is generating a wrong graph.
RE: Substituting Values in Plot - sparkz_alot - Nov-11-2017
Your Python code doesn't generate anything, except errors
w = np.linspace(0, 10E4, 10E4) the third (optional) argument should be an integer, not a float. f1=#eqn is not legal in Python.Perhaps you can show us the code that actually generates a graph
RE: Substituting Values in Plot - Hotdog1 - Nov-11-2017
import numpy as np
import matplotlib.pyplot as plt
plt.clf()
u=5;
E=1000;
w = np.linspace(0, 100000,100000)
f1= ((w*u)/(np.sqrt(1+(((w*u)/E)**2))))
plt.plot(w, f1)
axes = plt.gca()
axes.set_xscale('log')
axes.set_yscale('log')
axes.set_xlim([0, 10E4]) # x-axis bounds
axes.set_ylim([0, 10E4]) # y-axis bounds
plt.show()This is how my graph should look like:Image Graph should look