Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles on Trending Technologies
Technical articles with clear explanations and examples
How to remove rows that contain NAs in R matrix?
To remove rows that contain NAs in R matrix, we can follow the below steps −First of all, create a matrix.Then, use na.omit function to remove rows that contains NAs.ExampleCreate the matrixLet’s create a matrix as shown below −M
Read MoreHow to display mean for each group in point chart using ggplot2 in R?
To display mean for each group in point chart using ggplot2 in R, we can follow the below steps −First of all, create a data frame.Then, use geom_point and geom_summary functions and provide mean for fun argument with different size and shape of the point for mean display.ExampleCreate the data frameLet’s create a data frame as shown below −grp
Read MoreHow to convert alphabets to numbers in R data frame?
To convert alphabets to numbers in R data frame, we can follow the below steps −First of all, create a data frame.Then, use mutate_each function of dplyr package along with chartr function to convert alphabets to numbers.ExampleCreate the data frameLet’s create a data frame as shown below −x
Read MoreHow to remove double inverted commas in R matrix?
To remove double inverted commas in R matrix, we can follow the below steps −First of all, create a matrix.Then, use print function along with quote argument.ExampleCreate the matrixLet’s create a matrix as shown below −M
Read MoreHow to convert first letter of multiple string columns into capital in R data frame?
To convert first letter of multiple string columns into capital in R data frame, we can follow the below steps −First of all, create a data frame with string columns.Then, use sub function along with mutate_each function of dplyr package to convert first letter into capital in string columns.ExampleCreate the data frameLet’s create a data frame as shown below −Names
Read MoreHow to find the index of values in an R data frame column if they occur once?
To find the index of values in an R data frame column if they occur once, we can follow the below steps −First of all, create a data frame.Then, use which function along with duplicated function and single square brackets for subsetting to find the index of values in a column if they occur once.ExampleCreate the data frameLet’s create a data frame as shown below −x
Read MoreHow to create a column with column name for maximum value in each row of an R data frame?
To create a column with column name for maximum value in each row of an R data frame, we can follow the below steps −First of all, create a data frame.Then, use mutate function of dplyr package along with max.col function to create a column with column name for maximum value in each row of an R data frame.ExampleCreate the data frameLet’s create a data frame as shown below −x
Read MoreHow to find the row variance of columns having same name in data.table object in R?
To find the row variance of columns having same name in data.table object in R, we can follow the below steps −First of all, create a data.table object with some columns having same name.Then, use tapply along with colnames and var function to find the row variance of columns having same name.ExampleCreate the data.table objectLet’s create a data.table object as shown below −library(data.table) DT
Read MoreHow to find the row mean of columns having same name in R data frame?
To find the row mean of columns having same name in R data frame, we can follow the below steps −First of all, create a data frame with some columns having same name.Then, use tapply along with colnames and mean function to find the row mean of columns having same name.ExampleCreate the data frameLet’s create a data frame as shown below −df
Read MoreHow to find the sin of each value in columns if some columns are categorical in R data frame?
To find the sin of each value in columns if some columns are categorical in R data frame, we can follow the below steps −First of all, create a data frame.Then, use numcolwise function from plyr package to find the sin of each value in columns if some columns are categorical.ExampleCreate the data frameLet’s create a data frame as shown below −Level
Read More