Found 33676 Articles for Programming

How to create a new image from a WBMP file or URL using imagecreatefromwbmp() function in PHP?

Urmila Samariya
Updated on 09-Aug-2021 09:58:16

261 Views

In PHP, imagecreatefromwbmp() is an inbuilt function that is used to create a new image from a WBMP file or URL. imagecreatefromwbmp() returns an image identifier representing the image obtained from the given filename. We can use imagecreatefromwbmp() whenever we want to edit the images after loading them from a WBMP file. Using the imagewbmp() function, an image can be converted into WBMP.Syntaxresource imagecreatefromwbmp(string $filename)Parametersimagecreatefromwbmp() takes only one parameter, $filename. It holds the name of the image.Return Valuesimagecreatefromwbmp() returns an image resource identifier on success, and it gives an error on false.Example 1

How to create a new image from a PNG file or URL using the imagecreatefrompng() function in PHP?

Urmila Samariya
Updated on 09-Aug-2021 09:54:10

2K+ Views

In PHP, imagecreatefrompng() is an inbuilt function that is used to create a new image from a PNG file or URL. imagecreatefrompng() returns an image identifier representing the image obtained from the given filename.Syntaxresource imagecreatefrompng(string $filename)Parametersimagecreatefrompng() takes only one parameter, $filename. This parameter holds the name of the image or path to the PNG image.Return Valuesimagecreatefrompng() returns an image resource identifier on success, and it gives an error on false.Example 1 − Showing the loaded PNG image in the browserOutputExample 2 − Loaded and saving PNG image in the local drive pathOutputExplanation − In Example 2, a png image is ... Read More

How to create a new image from a JPEG file using the imagecreatefromjpeg() function in PHP?

Urmila Samariya
Updated on 09-Aug-2021 09:48:33

3K+ Views

imagecreatefromjpeg() is an inbuilt function in PHP that is used to create a new image from a JPEG file. It returns an image identifier representing the image obtained from the given filename.Syntaxresource imagecreatefromjpeg(string $filename)Parametersimagecreatefromjpeg() uses only one parameter, $filename, that holds the name of the image or path to the JPEG image.Return Valuesimagecreatefromjpeg() returns an image resource identifier on success, and it gives an error on false.Example 1OutputExample 2Input ImageOutput ImageExplanation − In Example 2, we loaded the jpeg image from the local path using the imagecreatefromjpeg() function. Thereafter, we used the imageflip() function to flip the image.Example 3 − ... Read More

How to print string vectors vertically in R?

Nizamuddin Siddiqui
Updated on 14-Aug-2021 08:28:17

398 Views

To print string vectors vertically in R, we can follow the below steps −First of all, create a vector.Then, use cat function to print the vector vertically.Example 1 Let's create a vector as shown below − Live DemoAlphabets

How to divide matrix rows by maximum value in each row excluding 0 in R?

Nizamuddin Siddiqui
Updated on 14-Aug-2021 08:26:59

296 Views

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

How to subset rows of an R data frame if all columns have values greater than a certain value

Nizamuddin Siddiqui
Updated on 09-Aug-2021 09:01:57

2K+ Views

To subset rows of an R data frame if all columns have values greater than a certain value, we can follow the below steps −First of all, create a data frame.Then, use filter_all function of dplyr package with all_vars function to subset the rows of the data frame for all columns having values greater than a certain value.Create the data frameLet's create a data frame as shown below −Example Live Demox1

How to divide data frame rows in R by row maximum?

Nizamuddin Siddiqui
Updated on 14-Aug-2021 08:25:24

297 Views

To divide the data frame row values by row maximum in 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 maximum.Create the data frameLet's create a data frame as shown below − Live Demox

How to find the row and column position of a value as vector in an R matrix?

Nizamuddin Siddiqui
Updated on 14-Aug-2021 08:24:24

803 Views

To find the row and column position of a value as vector in an R matrix, we can follow the below steps −First of all, create a matrix.Then, find the row and column position of a particular value using which function and reading the output with as.vector function.Example 1Create a matrixLet's create a matrix as shown below − Live DemoM1

How to divide the data.table object rows in R by row maximum?

Nizamuddin Siddiqui
Updated on 14-Aug-2021 08:18:57

136 Views

To divide the row values by row maximum 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 maximum.Create the data frameLet's create a data frame as shown below −library(data.table) x

How to find the critical value of F for one-way ANOVA in R?

Nizamuddin Siddiqui
Updated on 14-Aug-2021 08:17:39

2K+ Views

To find the critical value of F for one-way ANOVA in R, we can follow the below steps −First of all, create a data frame with one categorical and one numerical column.Then, use aov function to find the anova table.After that, use qf function to find the critical value of F for one-way ANOVA.Create the data frameLet's create a data frame as shown below − Live DemoGrp

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