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Nizamuddin Siddiqui has Published 2307 Articles
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
842 Views
To find the row total 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 sum function to find the row total of columns having same ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
2K+ Views
To apply two sample t test using a categorical column in R data frame, we can follow the below steps −First of all, create a data frame.Then, use t.test function with categorical column and numerical column linked with ~ sign.ExampleCreate the data frameLet’s create a data frame as shown below ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
3K+ Views
To create a boxplot of single column in R data frame with column name, we can follow the below steps −First of all, create a data frame with single numerical column and create the boxplot for that column using boxplot function.Then, create the same boxplot with show.names argument set to ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
220 Views
To find the percentage of values that lie within a range in single column R matrix, we can follow the below steps −First of all, create a matrix.Then, use sum function along with extreme values for range and length function to find the percentage of values that lie within that ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
94 Views
To create a column of product in data frames stored in R list, we can follow the below steps −First of all, create a list of data frames.Then, use lapply function to create a column of product in data frames stored in the list.ExampleCreate the list of data framesUsing data.frame ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
7K+ Views
To combine two rows in R data frame by addition, we can follow the below steps −First of all, create a data frame.Then, using plus sign (+) to add two rows and store the addition in one of the rows.After that, remove the row that is not required by subsetting ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
468 Views
To replace NAs with 0 in an R list that contains data.table objects, we can follow the below steps −First of all, create a list of data.table objects that contain some NAs.Then, use lapply function and is.na function to replace NAs with 0 in the list.ExampleCreate the listLet’s create a ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
120 Views
To remove hash 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 hash at last position in every value.Then, use gsub function to remove hash at last position from every value ... Read More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
2K+ Views
To find the count of each category in an R data frame column, we can follow the below steps −First of all, create a data frame.Then, use summarise function of dplyr package after grouping along with n.ExampleCreate the data frameLet’s create a data frame as shown below −GrpRead More
![Nizamuddin Siddiqui](https://www.tutorialspoint.com/assets/profiles/218290/profile/60_42434-1594357075.jpg)
Nizamuddin Siddiqui
356 Views
To find the number 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 to find the number of zeros in each row of the data.table object.ExampleCreate the data.table objectLet’s create a data.table ... Read More