Hello could you please tell me what is the function to get the absolute value of the real or complex number. most of other languages it is abs(x) , what is it in r? I did few searhces in the help docs for no avail. thanks F.J
Hi
Did you try
help.search("abs")
gives me
abs(base) Miscellaneous Mathematical Functions
meanabsdev(cluster) Internal cluster functions
absolute.size(grid) Absolute Size of a Grob
abs.error.pred(hmisc) Indexes of Absolute Prediction Error for
Linear
Models
corresp(MASS) Simple Correspondence Analysis
crabs(MASS) Morphological Measurements on
Leptograpsus
Crabs
loglm1(MASS) Fit Log-Linear Models by Iterative
Proportional
Scaling -- Internal function
quine(MASS) Absenteeism from School in Rural New
South
Wales
HTML(R2HTML) Outputs an object to a HTML file
mad(stats) Median Absolute Deviation
xtabs(stats) Cross Tabulation
filePathAsAbsolute(tools) File Utilities
or
?abs
You should enhance your search utility
Cheers
Petr
On 29 Apr 2004 at 22:56, Fred J. wrote:
> Hello
>
> could you please tell me what is the function to get
> the absolute value of the real or complex number.
> most of other languages it is abs(x) , what is it in
> r?
>
> I did few searhces in the help docs for no avail.
>
> thanks
> F.J
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
Petr Pikal
petr.pikal at precheza.cz
Are you looking for Re() and friends? Toy examples:> abs(Re(3+4i))[1] 3> abs(Re(-3+4i))[1] 3> abs(Re(3))[1] 3 see ?complex for further details on complex numbers in R vito ----- Original Message ----- From: Fred J. <phddas at yahoo.com> To: r help <r-help at stat.math.ethz.ch> Sent: Friday, April 30, 2004 7:56 AM Subject: [R] absolute value> Hello > > could you please tell me what is the function to get > the absolute value of the real or complex number. > most of other languages it is abs(x) , what is it in > r? > > I did few searhces in the help docs for no avail. > > thanks > F.J > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide!http://www.R-project.org/posting-guide.html
"Fred J." <phddas at yahoo.com> writes:> Hello > > could you please tell me what is the function to get > the absolute value of the real or complex number. > most of other languages it is abs(x) , what is it in > r? > > I did few searhces in the help docs for no avail.Will you believe it?> abs(1+1i)[1] 1.414214 In the complex case some may prefer Mod(x) which does the same thing. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907