Programming Articles - Page 1128 of 3363

To create a graph in base R with multiple shades of a particular color, we can follow the below steps −First of all, create color shades using colorRampPalette then plot a graph.Use the color shades to create the graph.Example 1Create the color shadesUsing colorRampPalette function to create the color shades between red and darkred color then creating the plot − Live DemoColor

To display axes ticks and labels inside the plot using ggplot2 in R, we can follow the below steps −First of all, create a data frame.Then, create a plot using ggplot2.After that create the same plot with theme function to change the position of axes ticks and labels.Create the data frameLet's create a data frame as shown below − Live Demox

To divide the row values by row variance in R’s data.table object, we can follow the below steps −First of all, create a data.table object.Then, use apply function to divide the data.table object row values by row variance.Create the data.table objectLet’s create a data.table object as shown below −library(data.table) x

To divide matrix row values by row variance in R, we can follow the below steps −First of all, create a matrix.Then, use apply function to divide the matrix row values by row variance.Create the matrixLet's create a matrix as shown below − Live DemoM

To divide data frame row values by row variance R, we can follow the below steps −First of all, create a data frame.Then, use apply function to divide the data frame row values by row variance.Create the data frameLet's create a data frame as shown below − Live Demox

To divide data frame row values by row maximum excluding 0 in R, we can follow the below steps −First of all, create a data frame.Then, use apply function and if else function to divide the data frame row values by row maximum excluding 0.Create the data frameLet's create a data frame as shown below − Live Demox

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