Programming Articles - Page 1143 of 3363

To save column means into a data frame in R, we can follow the below steps −First of all, create a data frame.Then, find column means using colMeans function and save it in an object.After that, use as.data.frame function to save the columns means into a data frame.Create the data frameLet's create a data frame as shown below − Live Demox1

To find the row that has maximum number of duplicates in an R matrix, we can follow the below steps −First of all, create a matrix.Then, convert matrix into data.table then use order function with head function to find the row that has maximum number of duplicates.Create the matrixLet’s create a matrix as shown below − Live DemoM

To create a scatterplot in base R with points depending on categorical column, we can follow the below steps −First of all, create a data frame.Then, use plot function to create the scatterplot with col argument and using categorical column with factor function.Create the data frameLet's create a data frame as shown below − Live Demox

To create two horizontal lines with different color after a threshold in R, we can follow the below steps −First of all, create a plot in base R.Then, add a line to the plot using abline function.After that, use segments function to partially change the color of the line.Create the plotUsing plot function to create a plot in base R − Live Demoplot(1:5, 1:5, xlim=c(0, 5))OutputAdd a line to the plotUsing abline function to add a line to the plot − Live Demoplot(1:5, 1:5, xlim=c(0, 5)) abline(h=3)OutputPartially color the lineUsing segments function to color the with yellow color starting from 0 to ... Read More

To limit the length of regression line using ggplot2 in R, we can follow the below steps −First of all, create a data frame.Then, create the scatterplot using ggplot2 with regression line.After that, create the scatterplot with regression and add xlim function.Create the data frameLet's create a data frame as shown below − Live Demox

To add regression residuals to data frame in R, we can follow the below steps −First of all, create a data frame.Then, use lm function to create the regression model and find the residuals using resid function and adding them to the data frame with $ operator.Create the data frameLet's create a data frame as shown below − Live Demox

To divide the row values by number of columns in R’s data.table object, we can follow the below steps −First of all, create a data.table object.Then, use apply function to divide the data.table object row values by number of columns.Create the data frameLet's create a data frame as shown below −library(data.table) x

To extract the p-value from t test in R, we can follow the below steps −First of all, create a data frame with numerical column or a numerical vector.Then, use t.test function to perform the test and put $p.value at the end to extract the p-value from the test output.Example1Create the data frameLet's create a data frame as shown below − Live Demox

To create a subset of an R data frame based on multiple columns, we can follow the below steps −First of all, create a data frame.Then, use single square brackets to subset the data frame based on multiple columns.Create the data frameLet's create a data frame as shown below − Live Demox1

To check if a character column only contains alphabets in R data frame, we can follow the below steps −First of all, create a data frame with a character column.Then, use grepl function to check if all the values in the column contains only alphabets.Example 1Let's create a data frame as shown below − Live Demox