Found 26504 Articles for Server Side Programming

How to remove percentage sign at last position from every value in R data frame column?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:33:28

2K+ Views

To remove percentage sign at last position from every value in R data frame column, we can follow the below steps −First of all, create a data frame with a column having percent sign at last position in every value.Then, use gsub function to remove the percent sign at last position from every value in the column.ExampleCreate the data frameLet’s create a data frame as shown below −var

How to find the absolute maximum of each group in R data frame?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:30:07

1K+ Views

To find the absolute maximum of each group in R data frame, we can follow the below steps −First of all, create a data frame.Then, use summarise_each function of dplyr package along with which.max and abs function to find the absolute maximum of each group after grouping with group_by.Example 1Create the data frameLet’s create a data frame as shown below −x

How to find the rank of each value in columns if some columns are categorical in R data frame?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:25:33

98 Views

To find the rank 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 rank of each value in columns if some columns are categorical.ExampleCreate the data frameLet’s create a data frame as shown below −Level

How to find the range of columns if some columns are categorical in R data frame?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:15:43

158 Views

To find the range of 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 range of columns if some columns are categorical.ExampleCreate the data frameLet’s create a data frame as shown below −Level

How to convert values in alternate rows to negative in R data frame column?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:13:03

965 Views

To convert values in alternate rows to negative in R data frame column, we can follow the below steps −First of all, create a data frame.Then, use vector multiplication with 1 and minus 1 to convert values in alternate rows to negative.ExampleCreate the data frameLet’s create a data frame as shown below −x

How to find the percent of NA’s in R data frame rows?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:11:20

538 Views

To find the percent of NAs in each row of an R data frame, we can follow the below steps −First of all, create a data frame.Then, use rowSums function and ncol function along with apply function to find the percent of NAs in each row of the data frameExampleCreate the data frameLet’s create a data frame as shown below −v1

How to find the row variance of columns having same name in R data frame?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:06:49

292 Views

To find the row variance 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 var function to find the row variance of columns having same name.ExampleCreate the data frameLet’s create a data frame as shown below −df

How to change the sign of even number rows in an R data frame column?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:04:02

337 Views

To change the sign of even number rows in an R data frame column, we can follow the below steps −First of all, create a data frame.Then, use vector multiplication with 1 and minus 1 to change the sign of even number rows.ExampleCreate the data frameLet’s create a data frame as shown below −x

How to find the percent of zeros in each row of a data.table object in R?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 06:01:51

114 Views

To find the percent of zeros in each row of a data.table object in R, we can follow the below steps −First of all, create a data.table object.Then, use rowSums function along with ncol function to find the percent of zeros in each row of the data.table object.ExampleCreate the data.table objectLet’s create a data.table object as shown below −library(data.table) v1

How to find the row standard deviation of columns having same name in R data frame?

Nizamuddin Siddiqui
Updated on 12-Nov-2021 05:57:38

138 Views

To find the row standard deviation 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 sd function to find the row standard deviation of columns having same name.ExampleCreate the data frameLet’s create a data frame as shown below −df

Advertisements