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Articles by Nizamuddin Siddiqui
Page 31 of 196
How to find the row sums by excluding a column in R data frame?
Suppose we have a numerical column in an R data frame that we do not want to include our analysis due to some characteristics such is similarity or distinction with the rest of the data then we might want to exclude that column from the analysis. One such situation would be finding the row sums by excluding a column. For this purpose, we can use the below steps −First of all, creating a data frame.Finding the row sums with the help of mutate function of dplyr package and setdiff function in base RCreate the data frameLet's create a data frame ...
Read MoreHow to create the combination of rows in two data frames having same columns in R?
To create the combination of rows in two data frames having same columns in R, we can follow the below steps −First of all, create two data frames.Then, combine the rows in the data frames with expand.grid and cbind with do.call.Create the data framesLet's create a data frame as shown below −Class
Read MoreHow to replace NAs with non-NA if there is only one non-NA in R data frame based on another column?
If we have only one non-NA value in an R data frame column and a column that is categorical then we might want to replace the NAs with the given non-NA. For this purpose, we can follow the below steps −First of all, creating a data frameThen replacing the NA with non-NA with the help of min function of base R and mutate function of dplyr package.Create the data frameLet's create a data frame as shown below −Grp
Read MoreHow to combine multiple columns into one in R data frame without using column names?
To combine multiple columns into one in R data frame without using column names, we can follow the below steps −First of all, create a data frame.Then, convert the data frame into a single column data frame.Again, convert the data frame into a single column without column names displayed in rows using row.names function.Create the data frameLet's create a data frame as shown below −Examplex
Read MoreHow to test for the difference between two regression coefficients in R?
To test for the difference between two regression coefficients, we can follow the below steps −First of all, creating data frame.Then creating a regression model.After that testing the difference between regression coefficients using LienarHypothesis function of car package.Create the data frameLet's create a data frame as shown below −x1
Read MoreHow to create a line chart using ggplot2 that touches the edge in R?
To create a line chart using ggplot2 that touches the edge we can follow the below steps −First of all, creating data frame.Then loading ggplot2 package and creating the line chart in default manner.After that creating the line chart with coord_cartesian function.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to find the groupwise correlation matrix for an R data frame?
To create groupwise correlation matrix for an R data frame, we can follow the below steps −First of all, create a data frame.Then, find the correlation matrix by splitting the data frame based on categorical column.Create the data frameLet's create a data frame as shown below −v1
Read MoreHow to convert a variable into zero mean and unit variance in an R data frame?
Converting a variable into zero mean and unit variance means that we want to standardize the variable and it can be done with the help of scale function we can follow the below steps −First of all, creating data frame.Then using scale function to convert the variable into zero mean and unit variance.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to subset an R data frame with condition based on only one value from categorical column?
To subset an R data frame with condition based on only one value from categorical column, we can follow the below steps −First of all, create a data frame.Then, subset the data frame with condition using filter function of dplyr package.Create the data frameLet's create a data frame as shown below −Class
Read MoreHow to display categorical column name in facet grid in R?
To display categorical column name in facet grid, we can use the following steps −First of all, creating data frame.Loading ggplot2 package and creating a chart with facetsCreating the chart with facets and labeller function to display categorical column nameCreate the data frameLet's create a data frame as shown below −x
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