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To plot a heatmap for 3 columns in Python with Seaborn, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create a dataframe, df, with 3 columns.Plot the rectangular data as a color-encoded matrix.To display the figure, use show() method.Exampleimport seaborn as sns import pandas as pd import numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True df = pd.DataFrame(np.random.random((3, 3)), columns=["a", "b", "c"]) sns.heatmap(df, cbar=False) plt.show()Output
To plot two histograms side by side using matplotlib, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Make two dataframes, df1 and df2, of two-dimensional, size-mutable, potentially heterogeneous tabular data.Create a figure and a set of subplots.Make a histogram of the DataFrame's, df1 and df2.To display the figure, use show() method.Examplefrom matplotlib import pyplot as plt import pandas as pd plt.rcParams["figure.figsize"] = [7.50, 3.50] plt.rcParams["figure.autolayout"] = True df1 = pd.DataFrame(dict(a=[1, 1, 1, 1, 3])) df2 = pd.DataFrame(dict(b=[1, 1, 2, 1, 3])) fig, axes = plt.subplots(1, 2) ... Read More
To make a circular matplotlib.pyplot.contourf, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Create x, y, a, b and c data points using Numpy.Create a figure and a set of subplots.Make a Contour plot using contourf() method.Set the aspect ratios.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(-0.5, 0.5, 100) y = np.linspace(-0.5, 0.5, 100) a, b = np.meshgrid(x, y) c = a ** 2 + b ** 2 - 0.2 ... Read More
To set the background color of a column in a matplotlib table, we can take the following steps −Set the figure size and adjust the padding between and around the subplots.Make a tuple for columns attribute.Make a list of lists, i.e., list of records.Make a list of lists, i.e., color of each cell.Create a figure and a set of subplots.Add a table to an axes, ax.Turn off 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 columns = ('name', 'age', 'marks', 'salary') cell_text = [["John", "23", "98", "234"], ... Read More
imageaffinematrixget() is an inbuilt function in PHP that is used to get an affine transformation matrix. This function is often used in linear algebra and computer graphics.Syntaxarray imageaffinematrixget(int $type, mixed $options)Parametersimageaffinematrixget() accepts only two parameters: $type and $options.$type − The $type parameter specifies the integer to IMG_AFFINE constants.IMG_AFFINE_TRANSLATEIMG_AFFINE_SCALEIMG_AFFINE_ROTATEIMG_AFFINE_SHEAR_HORIZONTALIMG_AFFINE_SHEAR_VERTICAL$options − If type is IMG_AFFINE_TRANSLATE or IMG_AFFINE_SCALE, options has to be an array with keys x and y, both having float values. If type is IMG_AFFINE_ROTATE, IMG_AFFINE_SHEAR_HORIZONTAL or IMG_AFFINE_SHEAR_VERTICAL, options has to be a float specifying the angle.Return ValuesIt returns an affine transformation matrix, an array with keys from 0 to 5 ... Read More
imageantialias() is an inbuilt function in PHP that is used to check whether antialias function is used or not. It activates the fast drawing anti-aliased methods for lines and wired polygons. It works only with true-color images and it doesn't support alpha components.Syntaxbool imageantialias($image, $enabled)Parametersimageantialias() takes two parameters: $image and $enabled.$image − The $image parameter is a GdImage object and an image resource that is returned by the image creation function imagecreatetruecolor.$enabled − The $enabled parameter is used to check whether antialiasing is enabled or notReturn Valuesimageantialias() returns True on success and False on failure.Example 1OutputRead More
imageconvolution() is an inbuilt function in PHP that is used to apply a 3×3 convolution matrix, using the coefficient and offset in the image.Syntaxbool imageconvolution ( $image, $matrix, $div, $offset)Parametersimageconvolution() takes four parameters: $image, $matrix, $div, and $offset.$image − This parameter is used to create the size of the image by using an image creation function such as imagecreatetruecolor().$matrix − This parameter contains an array of 3×3 matrix of floats.$div − It is used for normalization.$offset − This parameter is used to set the color offset.Return Valuesimageconvolution() returns True on success and False on failure.Example 1OutputInput PNG image before using ... Read More
imagegammacorrect() is an inbuilt function in PHP that is used to apply a gamma correction to a given Graphics Draw (GD) input image and an output gamma.Syntaxbool imagegammacorrect(resource $image, float $inputgamma, float $outputgamma)Parametersimagegammacorrect() takes three different parameters: $image, $inputgamma and $outputgamma.$image − Specifies the image to be worked.$inputgamma − Specifies the input gamma.$outputgamma − Specifies the output gamma.Return Valuesimagegammacorrect() returns True on success and False on failure.Example 1OutputInput image before using imagegammacorrect() PHP functionOutput image after using imagegammacorrect() PHP functionExplanation − In this example, we loaded the image from the local drive folder by using the imagecreatefrompng() function or we ... Read More
imageinterlace() is an inbuilt PHP function that is used to enable or disable interlace in an image. It is a method of encoding a bitmap image such that a person who has partially received it sees a degraded copy of the entire image.Interlacing an image lets users see portions of it as it loads, and it takes different forms depending on the image type. The non-interlaced JPEGs appear line-by-line. To enable interlacing on picture, we can simply call this function with the second parameter set to 1, or set to 0 (zero) to disable it.Syntaxint imageinterlace(resource $image, int $interlace)Parametersimageinterlace() takes ... Read More
imagesetpixel() is an inbuilt function in PHP that is used to set a single pixel at the listed coordinate.Syntaxbool imagesetpixel(resource $image, int $x, int $y, int $color)Parametersimagesetpixel() accepts four parameters: $image, $x, $y and $color.$image − Specifies the image resource to work on.$x − Specifies the x-coordinate of the pixel.$y − Specifies the y-coordinate of the pixel.$color − Specifies the color of the pixel.Return Values −imagesetpixel() returns True on success and False on failure.Example 1OutputExample 2Output