How to initialize a Series array of int ?

[vindiou]

"Error on calling 'OnBarUpdate' method on bar 11: Object reference not set to an instance of an object." Compilation is OK. Thanks for your help

namespace NinjaTrader.NinjaScript.Indicators
{
    public class aaTest : Indicator
    {
        private Series<int>[] aaa;
        
        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Description                                    = @"Enter the description for your nouveau custom Indicator here.";
                Name                                        = "aaTest";
                Calculate                                    = Calculate.OnBarClose;
                IsOverlay                                    = true;
                DisplayInDataBox                            = false;
                DrawOnPricePanel                            = true;
                DrawHorizontalGridLines                        = true;
                DrawVerticalGridLines                        = true;
                PaintPriceMarkers                            = true;
                ScaleJustification                            = NinjaTrader.Gui.Chart.ScaleJustification.Right;
                IsSuspendedWhileInactive                    = true;
            }
            else if (State == State.Configure)
            {
            }
            else if (State == State.DataLoaded)
            {
                aaa= new Series<int>[8];
            }      
        }
        
        protected override void OnBarUpdate()
        {
            if (BarsInProgress != 0 || CurrentBar <= 10 )
               return;
            
            for(int i=0; i<=7; i++)
              aaa[i][0]= 2;
        }
    }
}

[NinjaTrader_AlanP]

Hello vindiou,

Thank you for your note.

To Declare,

private int[] aaa;

To initialize,

aaa = new int[8];

To Set,

for(int i=0; i<=7; i++)
aaa[i]= 2;

Please let us know if you need further assistance.

[vindiou]

Sorry but you didn't read carefully my original question and my code example.

I didn't ask for :

An array of int (very simple) BUT
for SERIES arrays of int.

I need 8 series of int per bar = one series array (of dimension eight) int per bar.

example :aaa[2][4] = the current prior/last 5th int element of the 3rd serie.

Thanks

[NinjaTrader_AlanP]

Hello vindiou,

To declare a series of int arrays,

private Series<int[]>MySeries;

To initialize,

MySeries = new Series<int[]>(this, MaximumBarsLookBack.Infinite);

To set,

MySeries[0] = new []{0,1,2,3};

To Reference,

Print(MySeries[0][0] + " " + MySeries[0][1]);

Please let us know if you need further assistance.

[vindiou]

Thanks but that still isn't what I need.

I don't need a Series int array
BUT
an array of Series int

This is why I declared :
private Series<int>[] aaa;

Maybe I should initialize aaa to : ?
for (int i=1; i<=8; i++)
aaa[i] = new Series<int>(this,MaximumBarsLookBack.TwoHundredFif tySix);

The compiler seems to accept this, but how do I set aaa?
Moreover, how do I reference aaa if for example, I need to know what was the value of the 4th last/prior element of my 3rd Series for the current bar?
aaa[3][4] doesn't seem to work...

[NinjaTrader_AlanP]

Hello vindiou,

In your code you could set aaa with,
aaa[0][i]= 5;

And you could reference the 4th element of the third series with,
aaa[3][4]

Assuming its been set and is not null.

I would suggest you look into Lists in C# as they are easier to work with,

https://www.dotnetperls.com/list

Please let us know if you need further assistance.

[vindiou]

Sorry but your solution doesn't work, try it.

Indicator 'aaTest': Error on calling 'OnBarUpdate' method on bar 11: Object reference not set to an instance of an object.

aaa[i][0]= 5; OR aaa[0][i]= 5; gives the same error message

BTW, my question is on arrays, not lists.

Here's the code :

namespace NinjaTrader.NinjaScript.Indicators
{
    public class aaTest : Indicator
    {
        private Series<int>[] aaa;
        
        protected override void OnStateChange()
        {
            if (State == State.SetDefaults)
            {
                Description                                    = @"Enter the description for your nouveau custom Indicator here.";
                Name                                        = "aaTest";
                Calculate                                    = Calculate.OnBarClose;
                IsOverlay                                    = true;
                DisplayInDataBox                            = false;
                DrawOnPricePanel                            = true;
                DrawHorizontalGridLines                        = true;
                DrawVerticalGridLines                        = true;
                PaintPriceMarkers                            = true;
                ScaleJustification                            = NinjaTrader.Gui.Chart.ScaleJustification.Right;
                IsSuspendedWhileInactive                    = true;
            }
            else if (State == State.Configure)
            {
            }
            else if (State == State.DataLoaded)
            {
                aaa= new Series<int>[8];
            }      
        }
        
        protected override void OnBarUpdate()
        {
            if (BarsInProgress != 0 || CurrentBar <= 10 )
               return;
            
            for(int i=0; i<=7; i++)
              aaa[i][0]= 5;
        }
    }
}

[NinjaTrader_AlanP]

Hello vindiou,

If you would like a series where each slot in the series contains 8 values, you could use,

private Series<int[]>MySeries1;

else if (State == State.Configure)
{
MySeries1 = new Series<int[]>(this, MaximumBarsLookBack.Infinite);
}

protected override void OnBarUpdate()
{
if(CurrentBar<100) return;
		
MySeries1[0]= new int[8];	
			
for(int i=0; i<=7; i++)
{
    MySeries1[0][i]= i;	
}
foreach(int i in  MySeries1[0])
{
Print(i.ToString());
}
}

If this is not what you’re looking for, please provide more information on what you’re trying to do exactly, as the following is confusing.

I don't need a Series int array
BUT
an array of Series int

I didn't ask for :
An array of int (very simple) BUT
for SERIES arrays of int.

Please let us know if you need further assistance.

[vindiou]

I don't understand why you have difficulties to understand my original request.
I feel like you are trying to avoid to answer to it and find another solution because of some reason, maybe NinjaTrader hasn't implemented this.

Once again, I don't need a single Series of an int Array
I need an Array of Series (of int type).

Do you understand the difference between ??

private Series<int[]>MySeries1;
and
private Series<int>[] MySeries1;

Why didn't you test my last code and tell me what's wrong with it?

Thanks

[NinjaTrader_PatrickH]

Hello vindiou,

Thank you for your response.

To create, initialize, and set the values of an Array of Series<int> please see the basic code below. I have also attached the indicator for your reference to this post.

Please keep in mind we do not provide programming education nor do we provide debugging assistance.

public class TestArrayOfSeriesType : Indicator
	{
		private Series<int>[] SeriesArray;
		
		protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				Description									= @"";
				Name										= "TestArrayOfSeriesType";
			}
			else if (State == State.DataLoaded)
			{
				SeriesArray = new Series<int>[8];
				
				for (int i = 0; i < SeriesArray.Length; i++)
					SeriesArray[i] = new Series<int>(this, MaximumBarsLookBack.TwoHundredFiftySix);
			}
		}

		protected override void OnBarUpdate()
		{
			SeriesArray[0][0] = CurrentBar;
			
			Print("");
			Print(Time[0]);
			Print(SeriesArray.Length);
			Print(SeriesArray[0][0]);
		}
	}

Please let me know if you have any questions.

[vindiou]

Excellent Patrick, have a good day.