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lwx228
Level VII

Does JMP calculate the "cumulative density function" of CDF?

I'm searching for this code for the documentation, but I don't know what it means.

 

Get expert help.Thanks!

 

Names Default To Here( 1 );
/* Generate random values, Normal(0,1) */
Y = J( 150, 1, Random Normal() );

/* CDF function */
{Quant, CumProb} = CDF( Y ); Wait(0);

/* Draw empirical and theorical CDF */
New Window( "Empirical CDF",
	Graph Box(
		X Scale( -3, 3 ),
		Y Scale( 0, 1 ),
		Pen Color( "red" );
		For( i = 2, i <= N Row( Quant ), i++,
			H Line( Quant[i - 1], Quant[i], CumProb[i] );
			V Line( Quant[i - 1], CumProb[i - 1], CumProb[i] );
		);
		i = N Row( Quant );
		V Line( Quant[i], CumProb[i], 1 );
		Pen Color( "blue" );
		Y Function( Normal Distribution( q ), q );
	)
);
2 REPLIES 2
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lwx228
Level VII

Re: Does JMP calculate the "cumulative density function" of CDF?

I don't know whether "cumulative distribution function" and "cumulative density function" are the same.

Highlighted
mzwald
Staff

Re: Does JMP calculate the "cumulative density function" of CDF?

There is no cumulative density function. It is probably meant to have the meaning of cumulative distribution function.
Here is the topic help on the CDF() function:
https://www.jmp.com/support/help/en/15.0/#page/jmp/matrix-functions.shtml?os=win&source=application#...
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