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Data Visualization Articles
Page 45 of 68
How do I display real-time graphs in a simple UI for a Python program?
To display real-time graphs in a simple UI for a Python program, we can animate the contour plot.StepsSet the figure size and adjust the padding between and around the subplots.Create a random data of shape 10×10 dimension.Create a figure and a set of subplots using subplots() method.Make an animation by repeatedly calling a function *func*, using FuncAnimation() class.To update the contour value in a function, we can define a method, animate(), that can be used in FuncAnimation() class.To display the figure, use show() method.Exampleimport numpy as np import matplotlib.pyplot as plt import matplotlib.animation as animation plt.rcParams["figure.figsize"] = [7.50, 3.50] ...
Read MoreHow to draw a line outside of an axis in Matplotlib?
To draw a line (i.e., arrow) outside of an axis, we can use annotate() method, StepsSet the figure size and adjust the padding between and around the subplots.Create a new figure or activate an existing figure using figure() method.Clear the current figure.Add an '~.axes.Axes' to the figure as part of a subplot arrangement using add_subplot() method.Use annotate() method to place a line outside the axes.To display the figure, use show() method.Exampleimport matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True fig = plt.figure(1) fig.clf() ax = fig.add_subplot(1, 1, 1) ax.annotate('', xy=(0, -0.1), xycoords='axes fraction', xytext=(1, -0.1), ...
Read MoreHow to use multiple font sizes in one label in Python Matplotlib?
To use multiple font sizes in one label in Python, we can use fontsize in title() method.StepsSet the figure size and adjust the padding between and around the subplots.Create x and y data points using numpy.Plot x and y using plot() method.Initialize a variable, fontsize.Set the title of the plot using title() method with fontsize in the argument.Turn off the axes.To display the figure, use show() method.Exampleimport numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True x = np.linspace(-5, 5, 100) y = np.cos(x) plt.plot(x, y) fontsize = 20 ...
Read MoreHow to put the Origin at the center of the cos curve in a figure in Python Matplotlib?
To put the Origin at the center of the cos curve in a figure, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create x and y data points using numpy.Set the position of the axes using spines, top, left, right and bottom.Plot x and y data points using plot() method.Set the title of the plot.To display the figure, use show() method.Exampleimport numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True x = np.linspace(-5, 5, 100) y = np.cos(x) ax = plt.gca() ...
Read MoreHow do I specify an arrow-like linestyle in Matplotlib?
To draw an arrow-like linestyle in matplotlib, we can use quiver() method.StepsSet the figure size and adjust the padding between and around the subplots.Create x and y data points using numpy.Use quiver() method to draw a line.To display the figure, use show() method.Exampleimport numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True x = np.linspace(-5, 5, 100) y = np.sin(x) plt.quiver(x[:-1], y[:-1], x[1:]-x[:-1], y[1:]-y[:-1], scale_units='xy', angles='xy', scale=1, color='red') plt.show()Output
Read MorePlot a vector field over the axes in Python Matplotlib?
To plot a vector field over the axes in matplotlib, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Make X, Y, T, R, U and V data points using numpy.Add an axes to the current figure and make it the current axes.Plot a 3D field of arrows using quiver() method.To display the figure, use show() method.Exampleimport numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True n = 8 X, Y = np.mgrid[0:n, 0:n] T = np.arctan2(Y - n / 2., X - n/2.) ...
Read MoreHow to plot two Pandas time series on the same plot with legends and secondary Y-axis in Matplotlib?
To plot two Pandas time series on the sameplot with legends and secondary Y-axis, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create a one-dimensional ndarray with axis labels (including time series).Make a dataframe with some column list.Plot columns A and B using dataframe plot() method.Return the handles and labels for the legend using get_legend_handles_labels() method.Place a legend on the figure using legend() method.To display the figure, use show() method.Exampleimport pandas as pd from matplotlib import pyplot as plt import numpy as np plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = ...
Read MoreHow does Python's Matplotlib.pyplot.quiver exactly work?
To work with quiver, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create vector cordinates using numpy array.Get x, y, u and v data points.Create a new figure or activate an existing figure using figure() method.Get the current axis using gca() method.Set x and y limit of the axes.To redraw the current figure, use draw() method.To display the figure, use show() method.Exampleimport numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True soa = np.array([[0, 0, 3, 2], [0, 0, 4, 5], [0, 0, ...
Read MoreHow to repress scientific notation in factorplot Y-axis in Seaborn / Matplotlib?
To repress scientific notation in factorplot Y-axis in Seaborn/Matplotlib, we can use style="plain" in ticklabel_format()method.StepsSet the figure size and adjust the padding between and around the subplots.Make a dataframe with keys, col1 and col2.The factorplot() has been renamed to catplot().To repress the scientific notation, use style="plain" in ticklabel_format() method.To display the figure, use show() method.Examplefrom matplotlib import pyplot as plt import pandas as pd import seaborn as sns plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True df = pd.DataFrame({"col1": [1, 3, 5, 7, 1], "col2": [1, 5, 7, 9, 1]}) sns.catplot(y="col1", x="col2", kind='bar', data=df, label="Total", height=3.5) plt.ticklabel_format(style='plain', ...
Read MoreHow to make axes transparent in Matplotlib?
To make axes transparent in matplotlib, we can take the following steps, Set the figure size and adjust the padding between and around the subplots.Create a new figure or activate an existing figure using figure() method.Add an '~.axes.Axes' to the figure as part of a subplot arrangement.Set face color of the current axes.Add an axes to the figure.Create t and s data using numpy.Plot t and s data points using plot() method on axis 2 (from step 5).To make the axis transparent, use set_alpha() method and keep alpha value minimum.To display the figure, use show() method.Exampleimport matplotlib.pyplot as plt import ...
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