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Page 1941 of 2109
How can I change the font size of ticks of axes object in Matplotlib?
To change the font size of ticks of axes object in matplotlib, we can take the following steps −Create x and y data points using numpy.Using subplots() method, create a figure and a set of subplots (fig and ax).Plot x and y data points using plot() method, with color=red and linewidth=5.Set xticks with x data points.Get the list of major ticks using get_major_ticks() method.Iterate the major ticks (from step 5), and set the font size and rotate them by 45 degrees.To display the figure, use show() method.Exampleimport numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True ...
Read MoreShow decimal places and scientific notation on the axis of a Matplotlib plot
To show decimal places and scientific notation on the axis of a matplotlib, we can use scalar formatter by overriding _set_format() method.StepsCreate x and y data points using numpy.Plot x and y using plot() method.Using gca() method, get the current axis.Instantiate the format tick values as a number class, i.e., ScalarFormatter.Set size thresholds for scientific notation, using set_powerlimits((0, 0)) method.Using set_major_formatter() method, set the formatter of the major ticker.To display the figure, use show() method.Exampleimport numpy as np from matplotlib.ticker import ScalarFormatter from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True class ScalarFormatterClass(ScalarFormatter): def _set_format(self): ...
Read MoreHow to rotate the rectangle patch in a plot using Matplotlib?
To rotate the rectangle patch in a plot, we can use angle in the Rectangle() class to rotate it.StepsCreate a figure and a set of subplots using subplots() method.Add a rectangle on the patch, angle=45°.Add a patch on the axis.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) rectangle = patches.Rectangle((0.4, 0.25), 0.5, 0.5, edgecolor='orange', facecolor="green", linewidth=2, angle=45) ax.add_patch(rectangle) plt.show()Output
Read MoreHow to change the spacing between ticks in Matplotlib?
To set ticks on a fixed position or change the spacing between ticks in matplotlib, we can take the following steps −Create a figure and add a set of subplots.To set the ticks on a fixed position, create two lists with some values.Use set_yticks and set_xticks methods to set the ticks on the axes.To display the figure, use show() method.Exampleimport matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True fig, ax = plt.subplots() xtick_loc = [0.20, 0.75, 0.30] ytick_loc = [0.12, 0.80, 0.76] ax.set_xticks(xtick_loc) ax.set_yticks(ytick_loc) plt.show()Output
Read MoreHow to set a default colormap in Matplotlib?
To set a default colormap in matplotlib, we can take the following steps −Create random data using numpy, array dimension 4×4.Create two axes and one figure using subplots() method.Display the data as an image with the default colormap.Set the title of the image, for the default colormap.Set the default colormap using matplotlib rcParams.Display the data as an image, with set default colormap.Set the title of the image, for the default colormap.Adjust the padding between and around the subplots.To display the figure, use show() method.Exampleimport numpy as np from matplotlib import pyplot as plt import matplotlib as mpl plt.rcParams["figure.figsize"] = [7.00, 3.50] ...
Read MoreAdd minor gridlines to Matplotlib plot using Seaborn
To add minor gridlines to matplotlib plot using Seaborn, we can take the following steps −Create a list of numbers to plot a histogram using Seaborn.Plot univariate or bivariate histograms to show distributions of datasets using histplot() method.To make minor grid lines, we can first use major grid lines and then minor grid lines.To display the figure, use show() method.Exampleimport seaborn as sns from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True x = [5, 6, 7, 2, 3, 4, 1, 8, 2] ax = sns.histplot(x, kde=True, color='red') ax.grid(b=True, which='major', color='black', linewidth=0.075) ax.grid(b=True, which='minor', color='black', linewidth=0.075) plt.show()Output
Read MoreHow to annotate the points on a scatter plot with automatically placed arrows in Matplotlib?
To annotate the point on a scatter plot with automatically placed arrows, we can take the following steps −Create points for x and y using numpy.Create labels using xpoints.Use scatter() method to scatter the points.Iterate labels, xpoints and ypoints and annotate plot with label, x and y with different properties.To display the figure, use show() method.Exampleimport numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True xpoints = np.linspace(1, 10, 25) ypoints = np.random.rand(25) labels = ["%.2f" % i for i in xpoints] plt.scatter(xpoints, ypoints, c=xpoints) for label, x, y in zip(labels, xpoints, ypoints): plt.annotate( ...
Read MoreSetting a relative frequency in a Matplotlib histogram
To set a relative frequency in a matplotlib histogram, we can take the following steps −Create a list of numbers for data and bins.Compute the histogram of a set of data, using histogram() method.Get the hist and edges from the histogram.Find the frequency of the histogram.Make a bar with bins (step 1) and freq data (step 4).To display the figure, use show() method.Exampleimport numpy as np from matplotlib import pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True a = [-0.125, .15, 8.75, 72.5, -44.245, 88.45] bins = np.arange(-180, 181, 20) hist, edges = np.histogram(a, bins) freq = hist/float(hist.sum()) plt.bar(bins[:-1], ...
Read MoreHow to plot a circle in Matplotlib?
To plot a circle in matplotlib, we can take the following steps −Create a new figure or activate an existing figure using figure() method.Add a subplot arrangement to the current axis.Create a true circle at a center using Circle class.Add a patch to the current axis.Set limits of the x and y axes.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 fig = plt.figure() ax = fig.add_subplot() circle1 = patches.Circle((0.2, 0.2), radius=0.5, color='green') ax.add_patch(circle1) ax.axis('equal') plt.show()Output
Read MoreAdd alpha to an existing Matplotlib colormap
To add apha to an existing matplotlib colormap, we can take the following steps −Create data with a 4×4 dimension array using numpy.Get the colormap using plt.cm.RdBU.Create a new colormap using numpy.Set alpha value to the new colormap.Generate a colormap object using the list of colors.Create a new figure or activate an existing figure using figure() method.Add a subplot to the current figure, nrows=1, ncols=2 at index=1.Create a pseudocolor plot with a non-regular rectangular grid using pcolormesh() method.Create a colorbar for scalar mappable instance.Repeat steps 7 to 9, at index 2.Use tight_layout() to adjust the padding between and around the subplots.To ...
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