R coding problem help needed.

Hello, I really need some help with this. Whatever I do I cannot get the R code to do what I want.

The problem is,

"In the box below, write some code that will construct a vector x of the integers from 1 to 100, and then replace the first 10 elements of x with missing values. Make sure that the last line of your code contains just x (by itself). This is for grading purposes".

First off I am a complete novice with using R as I am a Maths student and we need to learn how to use it for part of the course. I've been okay up until now but I can't get work out what to do.

I've tried

c((x=1:100),(x[1:10]=NA)) but I don't think this is correct.

Any help would be amazing. Also if you could show me some useful websites I could use to learn how to use R more effectively.

'Missing values' sounds very ambiguous to me. But with your code and the x on the last line, putting that into R seems to give a reasonable output. I'm not sure what more they want.

For R, google is your friend - typing in questions will help. In R, you can also type in help(insert name of function here) and it'll bring up a page describing what the function does, what its inputs are etc.

Thank you for responding.

I'll try google tomorrow for more help on R I have a while before this is due.

So should I put my code as this,

c((x=1:100),(x[1:10]=NA)) x

with the x at the end. The wording is really confusing.

When I input the code I get,

c((x=1:100),(x[1:10]=NA))
[1] NA NA NA NA NA NA NA NA NA NA 11 12 13 14 15 16 17 18
[19] 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
[37] 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
[55] 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
[73] 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
[91] 91 92 93 94 95 96 97 98 99 100 NA

I don't understand where this NA is coming from at the end?

Yes, the wording is quite confusing.

It may be a good idea to have x on a seperate line, as typing that into one line on R won't work (as it won't know what to do inbetween the created vector and the x).

Thank you for helping me. I'll try that.

Hm, I didn't originally spot that but right you are.

From the code you've created I don't understand why a 101st element is created and why it is NA.

If you create the vector in a slightly different way it doesn't get that problem, for whatever reason.

I posted the code like this like you suggested, with the x on a separate line

c((x=1:100),(x[1:10]=NA))
x

and the NA 101'st value disappeared. We're using some software called Rteacher (not sure if you're familiar with it) to learn us how to use R and answer probability and stat questions. It's been glitchy as anything so would not surprise me if having the x on a separate line changed the vector.

I am using the regular version of R (I also have access to Rstudio but I'm not a huge fan of it) and I also got that error, maybe one day we'll know what it is as Maths students

But I'm glad that it's cleared up for you.