Message-ID: <1263976860115-1018251.post@n4.nabble.com>
Date: 2010-01-20T08:41:00Z
From: Dieter Menne
Subject: Please Please Please Help me (Changed to: calling a function with a list of parameters)
In-Reply-To: <176632.86849.qm@web110112.mail.gq1.yahoo.com>
Please, do not write "Help, Help" but give a meaningful header. Most people
here a specialized and check the posts they understand best.
Madhavi Bhave wrote:
>
> ?
> (I have already written the required R code which is giving me correct
> results for a given single set of data. I just wish to wish to use it for
> multiple data.)
>
It's fine that you posted the working part; in general, for posting you
should simplify the thing that do work to the bare bones (see example below)
Madhavi Bhave wrote:
>
> I have defined a function (as given below) which helps me calculate
> Macaulay Duration and Modified Duration and its working fine with given
> set of data.
>
> I just want to use this code for multiple data so that I get an output
> something like
>
> ???????? maculay_duration??????????????????? modified_duration
> ?
> ????????? 1423.797?????????????????????????????????? 1423.795
> ?
> ???????????? 44.339?????????????????????????????????????? 44.307
> ?
>
The most elegant approach uses package plyr; you even get the function
parameters in your output.
library(plyr)
# simplified version of your original function
duration = function(par_value, coupon_rate)
{
data.frame(macaulay_duration=2*par_value,modified_duration=3*coupon_rate)
}
# use read.table in your application instead of the line below
pars = data.frame(par_value=c(1000,100), coupon_rate=c(10,7))
mdply(pars,.fun=duration)
# par_value coupon_rate macaulay_duration modified_duration
#1 1000 10 2000 30
#2
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