Objects of Other Classes

[texasnomad]

Goal: Plot the skew of similar calculations against each other. For example, skew of dataseries (close[1]-close[0]) versus (close[0]-open[0])

Actions:
I created an indicator class called Statistics. Within that class, I wrote a method called Skew. The new indicator where I want to create objects from the Statistics class is called SkewDiff

Problem:
I don't understand how to call methods from other classes.

How do I create an object in the new indicator SkewDiff and assign its value to the Skew() method from the class Statistics? I know I could just copy and paste the method, but I'm trying to learn how to reference everything.

What I tried so far in SkewDiff (and it's probably way off the mark):

#region Variables
private DataSeries skewCtoO ;
#endregion
// skewCtoO represents skew of the Close to Open

protected override void Initialize()
{
Add(new Plot(Color.FromKnownColor(KnownColor.Orange), PlotStyle.Line, "ClosetoOpen"));

Statistics skewCtoO = new Statistics();
}

protected override void OnBarUpdate()
{
closeOpen.Set(Close[0] - Open[0]);
ClosetoOpen.Set(skewCtoO.Skew(barLookBack , closeOpen));}

[texasnomad]

Also, I realize that Statistics skewCtoO = new Statistics() calls the Statistics constructor, which does not exist. If I try using new Skew(), it won't compile.

[NinjaTrader_Ray]

If you are wanting to call a method that exists on a custom NinjaScript indicator, then you would write something like:

myIndicator.MyMethod();

[texasnomad]

ClosetoOpen.Set(Statistics.Skew(barLookBack , closeOpen));

NinjaTrader.Indicator.Indicator.Statistics()' is a 'method' which is not valid in the given context.

CS0119

[NinjaTrader_Ray]

I assume your method signature is:

Skew(int value, IDataSeries value)

returning a double value?

[texasnomad]

Yes, that's correct.

[NinjaTrader_JoshP]

texasnomad,

We will need your complete script, both files, to be able to understand what is going on. It would be helpful if you attached both .cs files as attachments here. Thanks.

[texasnomad]

It won't let me export files because there are programming errors. Is there another way to do it? I'd like to know for future reference.

I got around the issue by commenting line 45 of SkewDiff. Please remove the comments and try to recompile.

[NinjaTrader_JoshP]

Please review the comments inside the attached files.

There is no way to get around exporting files with errors. You can just upload the .cs file from your My Documents\NinjaTrader 6.5 folder directly, but that is not preferred.

[texasnomad]

Thanks, Josh. The comments clearly explain the issue.