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Articles on Trending Technologies
Technical articles with clear explanations and examples
Set variable point size in Matplotlib
To set the variable point size in matplotlib, we can take the following steps−Initialize the coordinates of the point.Make a variable to store the point size.Plot the point using scatter method, with marker=o, color=red, s=point_size.To display the figure, use show() method.Examplefrom matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True xy = (3, 4) point_size = 100 plt.scatter(x=xy[0], y=xy[1], marker='o', c='red', s=point_size) plt.show()Output
Read MoreHow to draw a rectangle over a specific region in a Matplotlib graph?
To draw a rectangle over a specific region in a matplotlib graph, we can take the following steps −Using subplots() method, create a figure and a set of subplots, where nrows=1.Using rectangle, we can create a rectangle, defined via an anchor point and its width and height. Where, edgecolor=orange, linewidth=7, and facecolor=green.To plot a diagram over the axis, we can create a line using plot() method, where line color is red.Add a rectangle patch on the diagram, using add_patch() method.To display the figure, use show() method.Examplefrom matplotlib import pyplot as plt, patches plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True figure, ax = plt.subplots(1) ...
Read MoreHow to create a draggable legend in Matplotlib?
To create a draggable legend in matplotlib, we can take the following steps −Create two lines, line1 and line2, using plot() method.Place the legend for plot line1 and line2 with ordered lables at location 1, using legend() method.To create a draggable legend, use set_draggable() method, where state=True. If state=False, then we can't drag the legend.To display the figure, use show() method.Examplefrom matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True line1, = plt.plot([1, 2, 3]) line2, = plt.plot([3, 2, 1]) leg = plt.legend([line2, line1], ["line 2", "line 1"], loc=1) leg.set_draggable(state=True) plt.show()OutputOn the output window, you can drag the legend around with ...
Read MoreAutomatically Rescale ylim and xlim in Matplotlib
To rescale ylim and xlim automatically, we can take the following steps −To plot a line, use plot() method and data range from 0 to 10.To scale the xlim and ylim automatically, we can make the variable scale_factore=6.Use scale_factor (from Step 2) to rescale the xlim and ylim, using xlim() and ylim() methods, respectively.To display the figure, use show() method.Examplefrom matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True plt.plot(range(0, 10)) scale_factor = 6 xmin, xmax = plt.xlim() ymin, ymax = plt.ylim() plt.xlim(xmin * scale_factor, xmax * scale_factor) plt.ylim(ymin * scale_factor, ymax * scale_factor) plt.show()Output
Read MoreHow do I plot Shapely polygons and objects using Matplotlib?
To plot shapely polygons and objects using matplotlib, the steps are as follows −Create a polygon object using (x, y) data points.Get x and y, the exterior data, and the array using polygon.exterior.xy.Plot x and y data points using plot() method with red color.Examplefrom shapely.geometry import Polygon import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True polygon1 = Polygon([(0, 5), (1, 1), (3, 0), (4, 6), ]) x, y = polygon1.exterior.xy plt.plot(x, y, c="red") plt.show()Output
Read MoreHow to bind the spacebar key to a certain method in Tkinter?
Tkinter methods can be bound with the Keys or Mouse to perform certain operations or events in an application. Let us suppose for a particular application, we want to bind the Key such that it will perform a certain operation. We can bind any key to a particular operation or event by defining the bind(, callback) method.ExampleIn this example, we will create rectangles of random width and height by using random Module in Python. So, whenever we will press the Key, it will generate some random shapes on the screen.#Import the required Libraries from tkinter import * import random ...
Read MoreHow to change the title bar in Tkinter?
Tkinter initially sets a default title bar for every application. We can update or replace the Title Bar of the Tkinter application by configuring the title("Enter any Title") method. For a particular application, let us see how we can change the title of a Tkinter application that calculates the square of a number.Example#Import the required Libraries from tkinter import * from tkinter import ttk import math #Create an instance of Tkinter frame win = Tk() #Set the geometry of tkinter frame win.geometry("750x270") #Set the Title of Tkinter window win.title("Square Calculator") def find_square(): no= int(entry.get()) ...
Read MoreHow to connect a progress bar to a function in Tkinter?
A Progress Bar helps to visualize the state of a running process. We have used and interacted with many progress bars such as getting the status of downloading a file from the internet, Loading a file on the local system, etc.Let us suppose that we want to create and connect a progress bar in our application. We will create a full-width progress bar by using ProgressBar(win, options) method. It can be configured through a button that enables and disables it.Example#Import the required Libraries from tkinter import * from tkinter import ttk import time #Create an instance of tkinter frame ...
Read MoreHow to disable a Combobox in Tkinter?
The Combobox widget is similar to the OptionMenu widget in Tkinter which gives the user a choice to select from the group of options. The Combobox widget allows users to select the option with an Entry widget that adds selected menu items from the dropdown list.We can Enable or Disable the options in the given Combobox widget by providing the state property. The state property forces to make a widget either active or disabled. To disable the Combobox widget, we have to set the state property as readonly or disabled.Example#Import the required Libraries from tkinter import * from tkinter import ttk ...
Read MoreHow to gray out (disable) a Tkinter Frame?
A Tkinter frame widget can contain a group of widgets. We can change the state of widgets in the frame by enabling or disabling the state of its underlying frame. To disable all the widgets inside that particular frame, we have to select all the children widgets that are lying inside that frame using winfor_children() and change the state using state=(‘disabled’ or ‘enable’) attribute.ExampleIn this example, we will create a button and an entry widget. Initially, the state of entry widget is disabled. But when we click the button, it will enable all the widgets in the frame.#Import the required Libraries ...
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