R programming questions..

[cdcaveman]

i was going through a tutorial on subsetting...
http://www.ats.ucla.edu/stat/r/modules/subsetting.htm

why would one name the variable with a dot? like hsb2.small

other languages use it to navigate through objects or arrays..

whats it used for in R?

 

[hft_boy]

Quote from cdcaveman:

i was going through a tutorial on subsetting...
http://www.ats.ucla.edu/stat/r/modules/subsetting.htm

why would one name the variable with a dot? like hsb2.small

other languages use it to navigate through objects or arrays..

whats it used for in R?

It's just style. Same thing as hsb2_small, but R is so cool that there are no objects or arrays going on here.

 

[comintel]

By the way here is an outstanding paper by Paul Teetor on how to program in R using functional and vector programming styles to get good performance:

http://quanttrader.info/public/FasterRCode.pdf

 

[cdcaveman]

nice.. thanks

heres what 've been working on

http://imageshack.us/photo/my-images/827/linepointcolor.png/

 

[cdcaveman]

Quote from cdcaveman:

nice.. thanks

heres what 've been working on

 

[comintel]

Wow - the volatility surface.

Are you looking for kinks to exploit?

 

[cdcaveman]

Quote from comintel:

Wow - the volatility surface.

Are you looking for kinks to exploit?

"kinks to exploit" haha.. coming on to me? haha


i'm just trying to make it work right now..

 

[cdcaveman]

do these look right at all to you guys?

 

[mathieurrr]

hey caveman, are you using IBrokers and tws with R to do all of this ? I am actually looking to do the same kind of stuff and wanted to know where you started out with all fo this.

 

[cdcaveman]

No... I use a function in quantmod...to get yahoo quotes