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Anthony,
For any point , D bars before the end of an array y, we may draw an
automatic line with ANGLEdeg [in degrees, positive or negative.
Avoid +-90, the tan is not defined there.
Since we do not have in AFL a tangent function [as we miss pi], we
should use their equivalents
D=50;ANGLEdeg=Param("a",45,-89,89,1);
x=Cum(1);L1=LastValue(x);
y=RSI();
x0=x[L1-D];
Y0=Y[L1-D];
pi=4*atan(1);ANGLErad=pi*ANGLEdeg/180;
z=y0+(sin(ANGLErad)/cos(ANGLErad))*(x-x0);
Plot(y,"",1,1);
Plot(IIf(x>=x0,z,-1e10),"",colorRed,1);
Plot(IIf(x>=x0,y0,-1e10),"",colorRed,1);
PlotShapes(shapeUpTriangle*(x==x0),colorYellow);
Title="ANGLEdeg="+WriteVal(ANGLEdeg,1.0);
Dimitris Tsokakis
--- In amibroker@xxxxxxxxxxxxxxx, "Anthony Faragasso" <ajf1111@xxxx>
wrote:
> Dimitri,
>
> Would it be possible to work at this from a different
way....something like:
>
> Angle=Param("Angle",45,10,90,1);
>
> Select an angle and then have the line drawn.
>
> Anthony
> ----- Original Message -----
> From: "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Sunday, January 25, 2004 5:59 AM
> Subject: [amibroker] Re: Slope in radians? question for Math
geniuses
>
>
> > Suppose you START 50 bars before the last bar and the END is 20
bars
> > ago.
> > For any ARRAY, the angle is
> >
> > START=50;END=30;
> > ARRAY=RSI();
> > L1=LastValue(Cum(1));
> > X0=L1-START;X1=L1-END;
> > Y0=ARRAY[X0];Y1=ARRAY[X1];
> > Plot(ARRAY,"",1,1);
> > Plot(LineArray(X0,Y0,X1,Y1),"",4,1);
> > Plot(LineArray(X0,Y0,X1,Y0),"",4,1);
> > ANGLE=atan((Y1-Y0)/(X1-X0));
> > Title="ANGLE="+WriteVal(ANGLE)+" RADS"+", ["+WriteVal
(45*ANGLE/atan
> > (1),1.0)+" DEGS]";
> >
> > Replace the ARRAY with yours and see the result in RADS [and
DEGS].
> > Note that the calculation does not match with the visual angle,
which
> > depends on the applied zoom and the dimensions of your graph.
> > Dimitris Tsokakis
> > --- In amibroker@xxxxxxxxxxxxxxx, "epintoem" <epintoem@xxxx>
wrote:
> > > Given two points.... how could I calculate the slope of the line
> > > connecting those two points....We have an atan function but I
have
> > no
> > > clue as to how to use it.
> > >
> > > Thanks for your help
> >
> >
> > Send BUG REPORTS to bugs@xxxx
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>
>
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