To find the cumulative sums 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 cumulative sums if some columns are categorical.ExampleCreate the data frameLet’s create a data frame ... Read More

To multiply vector values in sequence with data frame columns in R, we can follow the below steps −First of all, create a data frame.Then, create a vector.After that, use t function for transpose and multiplication sign * to multiply vector values in sequence with data frame columns.Example 1Create the ... Read More

To create a column of exponent 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 exponent in data frames stored in the list.ExampleCreate the list of data framesUsing data.frame ... Read More

To create a column of log with base 10 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 log with base 10 in data frames stored in the list.ExampleCreate ... Read More

If we have multiple matrices and we want to combine the rows of those matrices alternately then we would first need to find the order of the matrices with order function along with sequence and sapply function after reading the matrices with list after that the values will be combined ... Read More

To replace all values in an R data frame if they are greater than a certain value, we can use apply function with ifelse function.For Example, if we have a data frame called df and we want to replace all values in df with 5 if they are greater than ... Read More

The error hist.default, 'x' must be numeric occurs when we pass a non-numerical column or vector to the hist function. If we have a non-numerical column in a data frame or a non-numerical vector and we want to create the histogram of that data can be created with the help ... Read More

To create a data frame with numerical as well as factor columns in R, we simply need to add factor function before factor columns and numerical columns will be created without mentioning any specific characteristics, the values of numerical columns just need to be numerical in nature.Example 1Following snippet creates ... Read More

To create a column of log with base 2 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 log with base 2 in data frames stored in the list.ExampleCreate ... Read More

To create a column of natural log 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 natural log in data frames stored in the list.ExampleCreate the list of data ... Read More