Part 2 of my R Tutorial – Doing Math with Scalars Vectors.

I show how to create variables in R and how to assign values (scalars or vectors) to them. I also show how to calculate with those variables in R and I use some mathematical functions like sum, prod, min, max, mean, var.

What is the sign typed before the o.5 and in the other steps ?

Super!

Can anyone tell me please what is Product [prod(a) I mean]?

great work. I would recommend zooming on smaller part of the monitor so it makes it easier for us to read.

you are just awesome bro!!! the exact stuff i needed!!!

In SPSS, you have the table where you put all o the coding number such as 2,2,4,1 (if you know what I mean). In R, where is the data take from? Excel?. Thank you very much.

If would like to have a vector that contains 40 1s you may use replicate function instead. Ex.. items <- rep(1,40)

Please use a bigger font size , when you record a video tutorial ..

Thanks

“sort” command puts the lowest value first and the highest value at the last. regards!

Thanks! This is great!

Firstly, thanks for making this video. Its already been a help to me, and I’m only three minutes in.

I am trying to change the “step size”, but I’m missing something. I’ve tried it a couple of ways:

a <- seq(10, 100, by”10) a<-seq(10, 100, by”10) a<-c(10:100,by”10) ….and so on and so on, but R doesn’t want to listen to me. What am I doing wrong?

Thanks a lot for posting this!!!

thanks! you’re right Giovanni

Nevermind. I figured it out. For my version it seems to be “by=” not ” by” “. Back to the video. Thanks again, this is great.

@waleedmahmoud02 I made the video into 720p hd and it shows an = sign

awesome video

what does ‘sort’ command do ???

Thank you so much.

a<-seq(10,100, by=10)

Thank you very much!! Your videos are very helpful to me as well!!!!

Hi,

how can u get a sequence of length 40 with 1 printed 40 times… ie 1 1 1 1 1… 40times??? awaiting reply

or you can see the video in 720p

you are just awesome! thanks.

Thank you very much, I really like R, your videos are very helpfull

I’m a Linux and Apple OS X developer, I’ve done many cool things with R, but as soon as I saw the Windows crap, I was forced by my conscience to stop watching.

prod returns the product of all the values present in its arguments

Examples

print(prod(1:7)) == print(gamma(8))

Thanks for your Tutorial. 😉

Very nice Video, thx a lot. To me personally the Kraut accent is nowhere near as annoying as the one of the indian dude that posted tutorials on the same topic. Kartoffelkopf ;D

That’s because he spelled the word length wrong.

Hi!! I just downloaded the new version of R 2.15.2. On what you explained on minute 5:50 the program recognized the full vector

[1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

[39] 1 1