R Tutorial #2 - Math with Scalars and Vectors - Statistical Programming Language R

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.

[repsieximo]

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

[erics.]

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

[SoHoTandCool]

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

[mewhoi]

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

[eddiegashi]

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

Examples

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

[codenamerishi]

awesome video
what does 'sort' command do ???

[SuperReprise]

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

[GHXL]

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.

[leonardogutierrez]

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

[erics.]

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?

[waleedmahmoud]

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

[maziarkr]

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

[kgangavaram]

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

Thanks

[MrKernkraft]

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

[Roshan]

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

[giovanni]

That's because he spelled the word length wrong.