Mistakes in plain sight

Mixed models and power

I frequently make mistakes that are so simple and I will ask myself why I couldn’t spot it without checking for so many times or a helpful colleague pointing it out to me.

An example of one recent mistake is shown below, where I used | instead of ||.

[1] "Error in if (is.null(list(...)$direction) | list(...)$direction == \"decreasing\") { : \n  argument is of length zero\n"
attr(,"class")
[1] "try-error"
attr(,"condition")
<simpleError in if (is.null(list(...)$direction) | list(...)$direction == "decreasing") {    direction <- "decreasing"    comparisons <- paste(wt$dose, "- 0 >= 0")} else {    direction <- "increasing"    comparisons <- paste(wt$dose, "- 0 <= 0")}: argument is of length zero>

Debugging in scripts is not always easy but at least you know there is something wrong.

-TBC-