In addition to the good advice already given, I would add this: It is probably best to avoid using require() unless you actually will be using the value it returns e.g in some error checking loop such as given by thierry. In most other cases it is better to use library(), because this will give an error message at … Read more
To set the use of scientific notation in your entire R session, you can use the scipen option. From the documentation (?options): So in essence this value determines how likely it is that scientific notation will be triggered. So to prevent scientific notation, simply use a large positive value like 999:
colorRampPalette could be your friend here: And just to show it works:
I have a dirty dataset that I could not read it with header = T. After I read and clean it, I would like to use the now first row data as the column name. I tried multiple methods on Stack Overflow without success. What could be the problem? The dataset t1 should look like … Read more
This error can perhaps come up with multiple problems, but in your case you simply typed a capital C instead of a lowercase c. Try:
Try this (see ?detach for more details): It is possible to have multiple versions of a package loaded at once (for example, if you have a development version and a stable version in different libraries). To guarantee that all copies are detached, use this function. Usage is, for example or
You can get around it with adding group = 1: This removes the error. However, I did not check if your overall approach to this plot makes sense (see comments). Regarding why group = 1 is necessary: I would recommend this chapter in R for Data Science.
The successor to reshape2 is tidyr. The equivalent of melt() and dcast() are gather() and spread() respectively. The equivalent to your code would then be If you have magrittr imported you can use the pipe operator like in dplyr, i.e. write Note that you need to specify the variable and value names explicitly, unlike in melt(). I find the syntax of gather() quite convenient, because you can just specify the columns you … Read more
The problem is caused by row.names = “a”. Data set must have different row names. If you try to name all rows “a”, you get the error. If you have a vector which contains the row names you want to use, you can do this.
You can use sessionInfo() to accomplish that. However, as per comments and the answer below, there are better options [1] ‘0.3.9’ Or: