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This error occurs if you try to use an if statement to evaluate a condition in an object with multiple elements, like a vector. The if() function can only check one element to evaluate a condition. You can solve this error by using the ifelse() function, which...

This error occurs when you try to run chunks of code in an Rmd file like a normal R script. RStudio tries to run the highlighted code as R code, including the markdown parts. You can solve this error by clicking the green play button next to an individual code chunk...

This warning occurs when you try to convert a vector containing non-numeric values to a numeric vector. As this is a warning, you do not need to solve anything. However, you can replace non-numeric values or suppress the warning using suppressWarnings(). This tutorial...

This error occurs when you try to replace a value in a vector with a value of length zero. A value of length zero does not exist is the same as saying the value does not exist. This error typically happens when trying to use the zeroth index of a vector. In R, indexes...

If you try to perform k-means clustering with data containing missing values, NaN or Inf, you will raise the error: in do_one(nmeth) : NA/NaN/Inf in foreign function call (arg1). In R, The K-means algorithm cannot handle data with NA, NaN, or Inf values. By...

This error occurs when you try to sort a list without first using the unlist() function. To solve this error, you must use the unlist() function before calling sort(), for example: sort(unlist(a_list)) This tutorial will go through the error and how to solve it with...

This error occurs if you use the aesthetics function aes() in the incorrect place or without the mapping syntax. You can solve this error either by putting the aes() call inside ggplot2(), for example, ggplot(gapminder,aes(x=continent, y=lifeExp, fill=continent)) or...

Table of Contents Table of contents Example #1: Multiline ggplot2 command Example #2: Sorting Data Frame String Column Descending Order Summary This error commonly occurs when the is an unexpected use of a unary operator (+, -, !) This error can occur if you provide...

This error occurs if you do not provide a vector or a matrix to the barplot() function. You can solve this error by ensuring the values you want to plot are in a vector or a matrix. Alternatively, you can use ggplot2 geom_bar() instead of barplot This tutorial will go...

This error occurs when you try to convert numeric values to Date type using the as.Date() function but do not pass an origin argument to the function. You can specify an origin, for example: df$date <- as.Date(df$date, origin='1999-12-31') This tutorial will go...