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R Programming Articles
Page 7 of 174
How to create a scatterplot between a variable and an equation in R?
To create a scatterplot between a variable and an equation in R, we can follow the below steps −First of all, create a vectorThen, create the equation and store it in an object.After that, use plot function to create the plot between vector and equation objectCreate the vectorLet’s create a vector as shown below −x
Read MoreHow to replace matrix values using if else in R?
To replace matrix values using ifelse in R, we can follow the below steps −First of all, create a matrix.Then, use ifelse function to replace the values in the matrix.Create the matrixLet’s create a matrix as shown below −M
Read MoreHow to find the column mean of first n number of rows in R data frame?
To find the column mean of first n number of rows in R data frame, we can follow the below steps −First of all, create a data frame.Then, use colMeans function by reading the data frame with matrix function and nrow argument.Example1Create the data frameLet's create a data frame as shown below −x
Read MoreHow to find the point estimate using regression model in R?
To find the point estimate using regression model in R, we can follow the below steps −First of all, create a data frame.Then, create the regression model.After that, define the value for which we want to find the point estimate and use predict function to find the estimate.Create the data frameLet's create a data frame as shown below −x1
Read MoreHow to subset row values based on columns name in R data frame?
To subset row values based on columns name in R data frame, we can follow the below steps −First of all, create a data frame.Then, create a sample of column names of size equal to number of rows in the data frame and row names in the same manner with seq_len function, after that use cbind function to subset the rows based on columns name.Create the data frameLet's create a data frame as shown below −Gender_1
Read MoreHow to subset rows of data frame without NA using dplyr in R?
To subset rows of data frame without NA using dplyr in R, we can follow the below steps −First of all, create a data frame.Then, use filter function of dplyr package to subset the rows with !is.na.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to divide data frame rows in R by row minimum?
To divide the data frame row values by row minimum 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 minimum.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to subset rows of an R data frame if any columns have values greater than a certain value?
To subset rows of an R data frame if any 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 any_vars function to subset the rows of the data frame for any columns having values greater than a certain value.Create the data frameLet's create a data frame as shown below −x1
Read MoreHow to create a scatterplot with two legends using ggplot2 in R?
If we want to create a scatterplot with two legends then we must be having two categorical or factor columns. This can be done by using the below steps −Creating a data frame with two numerical and two categorical columnsCreating the scatterplot with shape and color argument of geom_point function of ggplot2 packageCreate the data frameLet's create a data frame as shown below −x
Read MoreHow to subset an R data frame based on numerical and categorical column?
Subsetting is one of the commonly used technique which serves many different purposes depending on the objective of analysis. To subset a data frame by excluding a column with the help of dplyr package, we can follow the below steps −Creating a data frame.Subsetting the data frame based on numerical as well as categorical column at the same time with the help of filter function of dplyr package.Create the data frameLet's create a data frame as shown below −Level
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