anchor.diff:  
       if ops.help then
           printfn "Runs a series of benchmarks testing the operations in the DiffSharp library.\n"
  -        printfn "dsbench [-r repetitions] [-f filename]\n"
  +        printfn "dsbench [-r repetitions] [-vsize size] [-f filename]\n"
           printfn "  -r repetitions  Specifies the number of repetitions."
           printfn "                  Higher values give more accurate results, through averaging."
           printfn "                  Default: %i" defaultOptions.repetitions
           printfn "                  Minimum:  %i" minRepetitions
  +        printfn "  -vsize size     Specifies the size of vector arguments for multivariate functions."
  +        printfn "                  Default: %i" defaultOptions.vectorSize
  +        printfn "                  Minimum:  %i" minVectorSize
           printfn "  -f filename     Specifies the name of the output file."
           printfn "                  If the file exists, it will be overwritten."
           printfn "                  Default: DiffSharpBenchmark + current time + .txt"
  
positive.code:             v
  
  
          let xv = Array.init 10 (fun _ -> rnd.NextDouble())
          let xvD = DV xv
  
          let vv = Array.init 10 (fun _ -> rnd.NextDouble())
          let vvD = DV vv
  
          let zv = Array.init 3 (fun _ -> rnd.NextDouble())
  
negative.code:         let fileName = ops.fileName
  
          printfn "Repetitions: %A" n
          printfn "Vector size: %A" ops.vectorSize
          printfn "Output file name: %s\n" fileName
  
          printfn "Benchmarking module version: %s" benchmarkver
  