Reputation: 605
I am trying to plot a graph using Matplotlib in tkinter. Here the graph should plot all the values of 'a' in the range 0-24. My code is as follows
import math
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
from tkinter import *
def att_func(d=0, n=0, z=0):
# Getting User inputs from the UI
d = d_user.get()
n = n_user.get()
z = z_user.get()
a = (-9.87 * math.sin(2 * ((2 * math.pi * (d - 81)) / 365)) + n * z)
a_label.configure(text=a)
return (a)
#Plotting the graph
class App:
def __init__(self, master):
frame = tkinter.Frame(master)
self.nbutton_graph = tkinter.Button(frame, text="Show Graph", command=self.graph)
self.nbutton_graph.pack()
f = Figure(figsize=(5, 5), dpi=100)
ab = f.add_subplot(111)
self.line, = ab.plot(range(24))
self.canvas = FigureCanvasTkAgg(f, self)
self.canvas.show()
self.canvas.get_tk_widget().pack()
def graph(self):
day_elevation_hrs = []
for i in range(24):
day_elevation_hrs.append(att_func(i, 0, 0)[0])
self.canvas.draw()
return
root = tkinter.Tk()
app = App(root)
# User Inputs
d_user = IntVar()
n_user = DoubleVar()
z_user = DoubleVar()
nlabel_d = Label(text="Enter d").pack()
nEntry_d = Entry(root, textvariable=d_user).pack()
nlabel_n = Label(text="Enter n").pack()
nEntry_n = Entry(root, textvariable=n_user).pack()
nlabel_z = Label(text="Enter z").pack()
nEntry_z = Entry(root, textvariable=z_user).pack()
# Displaying results
nlabel_a = Label(text="a is").pack()
a_label = Label(root, text="")
a_label.pack()
root.mainloop()
Here I am able to calculate what i need. But when I am trying to plot the same, I am unable to. I tried as many modification I could. But seems to be in a stale mate. I am sure that I am going wrong somewhere. but can't figure out where.
when i try to plot the same graph with matplotlib, with out tkinter, it works. but when I try to do it in a UI with tkinter i am unable to.. Here is the code for plotting graph in matplotlib without tkinter.
import matplotlib.pylab as pl
day_elevation_hrs=[]
for i in range(24):
day_elevation_hrs.append(att_func(i, 0, 0)[0])
pl.title("Elevation of a in range i")
pl.plot(day_elevation_hrs)
Upvotes: 0
Views: 2027
Reputation: 3158
This documentation shows that the second explicit parameter for FigureCanvasTkAgg.__init__
should be the master. (It's really a keyword parameter.)
So, have you tried changing that line to ...
self.canvas = FigureCanvasTkAgg(f, master=master)
Upvotes: 0
Reputation: 386382
Your code won't run as posted, but I can see two definite problems.
First, your App
is a frame that contains a canvas, but you never add the frame to the root window. Because of that, your canvas will be invisible.
Add the following code after you create an instance of App
:
app.pack(side="top", fill="both", expand=True)
Second, you are making a common mistake when defining the button to display the graph. The command
attribute takes a reference to a function. However, you are calling the graph()
function, and using the result as the value of the command
attribute.
In other words, change this:
self.nbutton_graph = Tk.Button(self, text="Show Graph", command=self.graph())
to this:
self.nbutton_graph = Tk.Button(self, text="Show Graph", command=self.graph)
Notice the lack of ()
after self.graph
. This could be the reason why you are seeing errors like 'App' object has no attribute 'line'
, since you are calling the graph function before you fully initialize all your variables.
Upvotes: 1