vb.net - How can I read a real double array from a text file in Visual Basic? -

i think must quite simple, new visual basic. want read set of real numbers text file , create double array them in vb program.

i have found on several places readalltext method, need array double. other codes have found complicated consider simple task. example, in fortran, write subroutine read open statement, cycle, , that's all.

is there simple way doing this?

assuming want end array , start calling file.readalllines, here's how might if you're sure data valid:

dim lines = file.readalllines(filepath) dim upperbound = lines.getupperbound(0) dim numbers(upperbound) double  = 0 upperbound     numbers(i) = convert.todouble(lines(i)) next 

here's simpler option:

dim lines = file.readalllines(filepath) dim numbers = array.convertall(lines, function(s) convert.todouble(s)) 

if of data might not valid better option:

dim lines = file.readalllines(filepath) dim numberlist new list(of double)  each line in lines     dim number double      if double.tryparse(line, number)         numberlist.add(number)     end if next  dim numbers = numberlist.toarray() 

you can use linq option provided earlier:

dim lines = file.readalllines(filepath) dim numbers = lines.where(function(s) double.tryparse(s, nothing)).                     select(function(s) double.parse(s)).                     toarray() 

that last option little inefficient because parses each number twice it's succinct , inefficiency not big deal if amount of data small.