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Vector code for snippets with for loop and if else code#

Snippets can help you to remember to include something important!.

Vector code for snippets with for loop and if else code#

Snippets leaves me with more mental CPU and enjoyment to spend on writing the code that I care about and want to focus on.

Snippets can boost your productivity, saving you keystrokes and reducing input errors.

I suggest you adopt them to a degree that serves you best. You don't have to pick a camp and be all-for or all-against snippets. I'm not going to shock you with this statement: the internet is home to a lot conflicting opinions! Snippets do not escape this ignominy, but I don't think it is a topic that make people's blood pressure soar!įor the sake of balance, I will present a cross-section of those opinions here. The general idea is to save you typing out the same things completely again and again, and again. With snippets, you can create a boilerplate file, and insert commonly used blocks of text. It is inserted by a command or through some trigger text. ? DefinitionĪ snippet is a template that can be inserted into a document. I will briefly cover how you can utilise these apps to get even more out of snippets.

The code editor I will use to showcase snippets is Visual Studio Code (VS Code), the most popular editor of the day.Īlso, there are some "text expander" apps that allow you to use snippets globally (across all apps). Most code editors support snippets out of the box. Utter a short phrase (type a prefix), wave your wand (press Enter or Tab), and presto! A wonderful event unfolds in front of you. You need to first create minus as above and index into it for the assignment like this minus <- newValue.Snippets can add a touch of magic to your editor. The warning was saying that it was just using the first number in your start and finish and giving you 30:50.įinally, you were constantly over writing your value of minus rather than adding to it. For example, when i = "Blue", you were trying to make a sequence starting at both 30 and 27 and ending at both 50 and 85. The reason you were getting those warnings was a combination of this problem and the last one. For example, when i = "Yellow" it returns 99:25 or 99, 98, 97. Second when you make the statement abund:abund you are not indexing the columns C2 C3 and C4 you are making a sequence starting at the value in C2 and ending at the value in C4. Blue will give you 1 and 9, since both those rows Species = "Blue"). As a result, then you index using abund, you may return multiple rows (ex. In each round, the value of i is being set to the next value in abund$Species, so first it is Blue then Black then Yellow, etc. First, your first for loop isn't doing what you think.

Minus <- rowSums(abund)Īlso, for what it is worth there are quite a few problems with your original code. This is probably better done without any loops.

Thank you for your time and help with this. Which returns this: There were 12 warnings (use warnings() to see them) Minus <- ifelse(i = j, sum(abund[abund$Species = i, This is my code so far: # Use for loop to create vector of sums for select species or 0 for species not selected I'm having trouble with my code and hope it's just a small matter of defining a range, but I'm not sure. If the species in abund does not match the species in color then add a 0 to the new vector minus. So, if the Species in abund matches the species in color then add columns C2 through C4 together in a new vector minus.

I would like to add together some of abund’s columns but only if they match the correct species I’ve specified in the vector colors. This is my dataframe abund: Species Total C1 C2 C3 C4 I'm having a problem with nested for loops and ifelse statements.