Debugging with Print()

[RDPoS]

I tried the search feature for a few examples of Print() statements used for debugging but came up with nothing useful.

Is there a thread around somewhere with a number of examples of using Print()?

T.I.A.

[NinjaTrader_Brett]

Hello,

Thanks for your forum post.

Sure, Please see here:

http://www.ninjatrader.com/support/forum/showthread.php?t=3418

and also here:

http://www.ninjatrader.com/support/helpGuides/nt7/print.htm?zoom_highlightsub=Print

Let me know if I can be of further assistance.

[Bayesian]

Hello Group,

I placed a print statement inside of the method but get an error message from the print line (CS0120). This error message says:
An object reference is required for the nonstatic field, method, or property 'member'
In order to use a non-static field, method, or property, you must first create an object instance.

I belive that the method does not reconize that the print() statement belongs to the using NinjaTrader.Strategy Class. How do I fix this. I am using the print statement to test that the array is being passed to the method.

Here is my code below.

static double ProbLast50(ref double[] array_ClosePrice)
{
double P_ProbLast50 = 0;
int[] LongORShort = new int[50];
int i;

for (i = 0; i < 50; i++)
{
LongORShort[i] = 0;
Print("ClosePrice["+ i.ToString("00")+ "] " + array_ClosePrice[i].ToString("00.00"));
}
return P_ProbLast50;

} // End of ProbLast500

Why does it not recognize the print statement inside of the method. The print statement works in the OnBarUpdate() inside of the strategy.
Thanks for your help,

Bayes

[NinjaTrader_Brett]

Hello,

Print is a NinjaTrader overridden function that is only able to access in OnBarUpdate() and other NinjaTrader methods. I'm not sure where your culling this method from.

If you move this code into OnBarUpdate() does it now run?

I look forward to assisting you further.

[Bayesian]

Using Print () in methods

Hello Brett,
Thanks for your help.
Here is how my program code is structed below.

Why can't the method section (marked by ***********) call to the using NinjaTrader.Strategy or Indicator where ever the Print() method is located?
Why does it have to be in the OnBarUpdate() braces { }?
Is not "methods" still part of the names space and class for the strategy?

#region Using declarations
using System;
......
using NinjaTrader.Cbi;
using NinjaTrader.Data;
using NinjaTrader.Indicator;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Strategy;
#endregion


namespace NinjaTrader.Strategy
{

public class Dynamic : Strategy
{

protected override void Initialize()
{
} //End of Initialize

protected override void OnBarUpdate()
{
for (int i = 0; i < 50; i++)
{
array_ClosePrice[i] = Close[i];
// Print("ClosePrice["+ i.ToString ("00")+ "] " + array_ClosePrice[i].ToString("00.00"));
} //End of for loop
P_LongORShort = ProbLast50(ref array_ClosePrice);
Print("P_LongORShort " + P_LongORShort.ToString("0.000"));

} // End of On Bar Update


//********************************************
// Methods used in Dynamic Strategy class

static double ProbLast50(ref double[] array_ClosePrice)
{
//do something and print() out debug text to a window
} // End of ProbLast500

} // End of Dynamic Strategy Class

} // End of namespace NinjaTrader Strategy

[NinjaTrader_Austin]

Bayesian, please simplify your string to print, perhaps by concatenating it all to a single string before printing it. I just ran this test, and everything worked as expected, showing it is actually possible to use Print() inside a helper method.

void PrintTest(string s)
{
    Print(s);
}
protected override void OnBarUpdate()
{
    PrintTest(Close[0].ToString());
}