A function to delete rows from an array based on equality among the columns

downselect.jl

A = readdlm("filename.csv")

function droprows(A::AbstractMatrix, r)
  keeprows = Int[]
  for i in 1:size(A,1)
    if A[i,r[1]] == A[i,r[2]] == A[i,r[3]]
      continue
    else
      push!(keeprows, i)
    end
  end
  @show keeprows
  B = A[keeprows,:]
  return B
end

droprows(A, [10,11,12])