seq(from, to, numberOfPoints)

[arcolombo]

Here is a handy function that doesn't restrict itself to integers, but is very similar to the R base::seq function, which is seq(from, to, numberofPoints). In this case, this is used to create sequences from -x0 to x1 by 2*x0/(numberofPoints)

arma::vec seq_cpp(double a, double np){
  double inc  = (2*a)/np;

  arma::vec s(np);

  for(unsigned int i = 0; i < np; i++){
    s(i) = -a + i*inc;
  }

  return s;
}

[arcolombo]

If it is preferable to submit a formal Pull Request, then I could....

[coatless]

Hi @arcolombo, please do so! This will be a great addition. Thanks.

[arcolombo]

ok to close this out.

[arcolombo]

I'm honestly way too lazy to send a pull request, but here it is with armadillo library

arma::vec seq_by(long double a, long double np){

arma::vec s(np);
s = arma::linspace(-a,a,np); 


  return s;
  }

[arcolombo]

prolly not even needed after reading through Arma docs...

[coatless]

@arcolombo

You would be amazed.

This is actual a great example of using linspace in Armadillo's API.

I'll bring it into the seq set of functions later today. Thanks again!