where is the wrong when I use multiroot in below to find the roots?
library(rootSolve)
fun
Hi Seyed. I've runned your script and I haven't any mistake:
##
> install.packages("rootSolve")
Installing package into ‘C:/Users/GIC 76/Documents/R/win-library/3.0’
(as ‘lib’ is unspecified)
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.0/rootSolve_1.6.5.1.zip'
Content type 'application/zip' length 646131 bytes (630 Kb)
opened URL
downloaded 630 Kb
package ‘rootSolve’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\GIC 76\AppData\Local\Temp\RtmpOmrd7B\downloaded_packages
> library(rootSolve)
Warning message:
package ‘rootSolve’ was built under R version 3.0.3
> fun (All curve(fun(x), -10, 10)
> abline(h=0, col=2)
> (All Sys.info()
sysname release version nodename machine login
"Windows" "7 x64" "build 7601, Service Pack 1" "GIC76-HP" "x86-64" "ivan.gonzalez"
user effective_user
"ivan.gonzalez" "ivan.gonzalez"
> sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=Spanish_Colombia.1252 LC_CTYPE=Spanish_Colombia.1252 LC_MONETARY=Spanish_Colombia.1252 LC_NUMERIC=C LC_TIME=Spanish_Colombia.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] rootSolve_1.6.5.1
loaded via a namespace (and not attached):
[1] tools_3.0.1
##
Did you see curve of the function?
Do you think the root of that is 15011999?
Hi Seyed,
use uniroot.all instead of multiroot (which is intended to solve a set of (nonlinear) equations).
All
I used both multiroot and uniroot.all in my question, and i know uniroot.all can find the roots, but i can not find them by multiroot!!!
Why does not multiroot work good?
I tried to find the root of the function near zero by wolfram mathematica as follow
FindRoot[Cos(2*x)^3,{x,0}]
but the result was zero (similar starting value), while it is clear in attached file that zero is not a root for this function.
Does anyone have any opinions?
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