If you want to convert all elements of a to a single numeric vector and length(a) is greater than 1 (OK, even if it is of length 1), you could unlist the object first and then convert. Bear in mind that there aren’t any quality controls here. Also, X$Days a mighty odd name.
The names (column names) of the first dataframe do not match the names of the second one. Just as the error message says. If you do not care about the names of the 3rd or 4th columns of the second df, you can coerce them to be the same: Then things should proceed happily.
The names (column names) of the first dataframe do not match the names of the second one. Just as the error message says. If you do not care about the names of the 3rd or 4th columns of the second df, you can coerce them to be the same: Then things should proceed happily.
maybe you want ifelse:
By using the merge function and its optional parameters: Inner join: merge(df1, df2) will work for these examples because R automatically joins the frames by common variable names, but you would most likely want to specify merge(df1, df2, by = “CustomerId”) to make sure that you were matching on only the fields you desired. You … Read more
%<>% isn’t exported by dplyr (only %>% is). You need to load magrittr instead. Your reproducible example is running into a subtle magrittr bug, which causes the evaluation of pipeline expressions to search for some operators in magrittr’s scope, rather than in the calling scope. That way, x %<>% y %>% z, which evaluates as … Read more
If you don’t want to worry about speed (and with 155 columns you probably don’t care) you can use the t.test function and apply it to every column. Simulate some data first Then we can apply the t.test function to all but the first column using the formula argument. which returns the test statistic for … Read more
%…% operators %>% has no builtin meaning but the user (or a package) is free to define operators of the form %whatever% in any way they like. For example, this function will return a string consisting of its left argument followed by a comma and space and then it’s right argument. The base of R … Read more
I was finally able to work out the code for my scraping. It seemed to be working fine and then all of a sudden when I ran it again, I got the following error message: I am not sure why as I changed nothing in my code. Please advise.
This question already has answers here: How to open CSV file in R when R says “no such file or directory”? I’m new to R, and after researching this error extensively, I’m still not able to find a solution for it. Here’s the code. I’ve checked my working directory, and made sure the files are … Read more