A Series code in C#?

Grasshopper Developer
1

// Someone could explain, Why this code, do not output yet exactly the same List as the series component?

private void RunScript(double Start, double Step, int Count, ref object Series)
  {
    List<double> numbers = new List<double>();

    // S = Start
    // N = Step
    // C = Count

    for (double i = Start; i < Start + (Step * Count); i += Step){
      numbers.Add(i);
    }
    Series = numbers;

  }

SeriesInC#.gh (9.1 KB)

2

You are missing the minus 1 in the condition of your for loop. It should be

private void RunScript(double Start, double Step, int Count, ref object Series)
{
List numbers = new List();

// S = Start
// N = Step
// C = Count

for (double i = Start; i < Start + (Step * Count) - 1; i += Step){
  numbers.Add(i);
}
Series = numbers;

}

3

I would recommend not using floating point maths to determine loop iterations. Whether or not your supposedly final i value is going to be 30.00000000002 or 29.9999999998 might as well be a matter of chance.

Use integers to count loop iterations and compute the floating point value afresh inside each iteration.

3 Likes
4

Dear Michael Pryor !
Thanks for your answer!

Best.

Andres

5

Dear DavidRutten,
Thanks for your answer.

I try this way, as a recursive Function, and is working now:
There is a simple way to do it?

Thanks
Best!
Andres

private void RunScript(double iStart, double iStep, int iCount, ref object A)
  {
    List<double> numbers = new List<double>();

    iCount = iCount - 1;
    numbers.Add(iStart);

    A = mySeries(iStart, iCount, iStep, numbers);
  }

  // <Custom additional code> 
  List<double> mySeries (double start, int count, double step, List<double>numbers){



    if (count > 0){
      count = count - 1;
      start = start + step;
      numbers.Add(start);
      // recursive function
      mySeries(start, count, step, numbers);
    }
    return numbers;
  }

SeriesInC#-RecursiveFunction.gh (8.4 KB)

6

Yeah don’t use recursion if you can help it. C# is stack recursive, not tail-recursive so there’s only so many steps you can take before you get a stack overflow exception.

double[] numbers = new double[Count];
for (int i = 0; i < Count; i++)
  numbers[i] = Start + i * Step;
1 Like
7

Thanks David!
SeriesinC# Array + a for Loop!
I share the code here, for any one else who is learning as me! :SeriesinC#Array forLoop.gh (11.4 KB)

private void RunScript(double Start, double Step, int Count, ref object A)
{
double numbers = new double[Count];

for (int i = 0; i < Count; i++){
  numbers[i] = Start + i * Step;
}

A = numbers;

}

8

Quick tip, if you put triple backticks around multiline code it will format correctly on discourse.