Does anyone know if there is an R function called checkParams() and if so, could explain what it does? I found a checkParams function here, but I do not think this is the one being used by the code I am reading.
Related
I realize this is a pretty niche problem, but I figure it's worth asking anyway.
I'm working on a program that does root-finding, and the function that it's trying to find a root for involves computing Fresnel integrals, which are implemented using erf(). I thought I'd try using the IntervalRootFinding package, but haven't gotten very far with it. I get a MethodError exception, which looks like:
MethodError: no method matching _erf(::Complex{IntervalArithmetic.Interval{Float64}})
Any advice?
IntervalArithmatic requires that your functions know how to work with intervals. Since erf is monotonic, you could define your own implimentation
using IntervalArithmatic
erf(x::Interval{T}) where T = Interval(prevfloat(erf(x.lo)), nextfloat(erf(x.hi)))
How can I find what package a function is in?
I'm just learning R and sometimes know what function I want but can't remember which package it's in - is there another function or easy way to look this up? The github cheatsheets show which functions are in a package, but I'm looking for the reverse - I've been googling but looking for a function etc. to find this. Thanks!
I have been tasked to use either the function readline() or scan() in my program, though the definitions in R Studio are vague and confusing for a beginner like me. Can someone please explain the main uses of these functions and how can I use them properly? Thank you!
I am trying to follow the code set out in camera trapping for wildlife research, using my own data. I am trying to use the function fix.dta(). I am getting the error message error in fix.dta, could not find function fix.dta. I have tried googling the function but can not find anything about it at all. I was hoping someone may know how to help?
Many thanks
.dta is a file extension for stata files. Maybe you mean fix.data() function.
After forming the matrix( which is my resultant image ) from certain data I am trying to display the image using the "imagesc" in r. The same thing I already had done in Matlab. To do the same in r I found out "imagesc" in r. but when I use this function it is showing the following error message
No documentation for ‘imagesc’ in specified packages and libraries:
you could try ‘??imagesc’
Even I already incorporated
library(R.matlab)
please help me to resolve the issue? I am a beginner in r programming.
You are looking for the function imagesc in the wrong package.
The package R.matlab doesn't have such function (see R.matlab).
You can find it in the matlab package, though.
So just do:
install.packages("matlab")
library(matlab)
and you'll be good to go with imagesc.
That said, if your task is going to be a recurrent one, I think it's a good idea to use native R solutions, instead of Matlab's. In such case, you may want to check ggplot2::geom_tile.
Check this image, for instance: