bfcast.html

主要是介绍人工模拟股票市场的

		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getConditionsObject"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getConditionsObject">getConditionsObject</A></H3><P>
		<CODE>- (BitVector *)<B>getConditionsObject</B>
		</CODE><P>
		Returns an object of type BitVector, the represnetation of 
conditions that is actually used inside this class or 
calculations
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getConditionsWord:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getConditionsWord:">getConditionsWord:</A></H3><P>
		<CODE>- (int)<B>getConditionsWord:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Returns the integer representation of the <I>x</I>'th word in the 
conditions
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getConditionsbit:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getConditionsbit:">getConditionsbit:</A></H3><P>
		<CODE>- (int)<B>getConditionsbit:</B>(int)<EM>bit</EM>
			
		</CODE><P>
		Returns 0,1,or 2, for a given <I>bit</I> in the conditions records
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getCval"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getCval">getCval</A></H3><P>
		<CODE>- (double)<B>getCval</B>
		</CODE><P>
		Return c coefficient from demand equation
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getForecast"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getForecast">getForecast</A></H3><P>
		<CODE>- (double)<B>getForecast</B>
		</CODE><P>
		Return forecast from this object
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getLastactive"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getLastactive">getLastactive</A></H3><P>
		<CODE>- (int)<B>getLastactive</B>
		</CODE><P>
		Return the time on which this forecast was last active
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getLforecast"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getLforecast">getLforecast</A></H3><P>
		<CODE>- (double)<B>getLforecast</B>
		</CODE><P>
		Get forecast from the previous time period
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getSpecfactor"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getSpecfactor">getSpecfactor</A></H3><P>
		<CODE>- (double)<B>getSpecfactor</B>
		</CODE><P>
		Return the specfactor value of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getSpecificity"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getSpecificity">getSpecificity</A></H3><P>
		<CODE>- (int)<B>getSpecificity</B>
		</CODE><P>
		Return the specificity of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getStrength"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getStrength">getStrength</A></H3><P>
		<CODE>- (double)<B>getStrength</B>
		</CODE><P>
		Return strength of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- getVariance"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/getVariance">getVariance</A></H3><P>
		<CODE>- (double)<B>getVariance</B>
		</CODE><P>
		Return the variance of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- incrCount"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/incrCount">incrCount</A></H3><P>
		<CODE>- (int)<B>incrCount</B>
		</CODE><P>
		Increment this forecast's count variable
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- incrSpecificity"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/incrSpecificity">incrSpecificity</A></H3><P>
		<CODE>- (void)<B>incrSpecificity</B>
		</CODE><P>
		Raise the specificity value of this forecast by one unit
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- maskConditionsbit:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/maskConditionsbit:">maskConditionsbit:</A></H3><P>
		<CODE>- (void)<B>maskConditionsbit:</B>(int)<EM>bit</EM>
			
		</CODE><P>
		No method description.
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- print"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/print">print</A></H3><P>
		<CODE>- <B>print</B>
		</CODE><P>
		Return some disgnostic information about the status of 
variables inside this forecast to the terminal
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- printcond:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/printcond:">printcond:</A></H3><P>
		<CODE>- <B>printcond:</B>(int)<EM>conditions</EM>
			
		</CODE><P>
		No method description.
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setAval:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setAval:">setAval:</A></H3><P>
		<CODE>- (void)<B>setAval:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set a coefficient from demand equation
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setBitcost:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setBitcost:">setBitcost:</A></H3><P>
		<CODE>- (void)<B>setBitcost:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set the variable bitcost at <I>x</I>
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setBval:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setBval:">setBval:</A></H3><P>
		<CODE>- (void)<B>setBval:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set b coefficient from demand equation
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setCnt:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setCnt:">setCnt:</A></H3><P>
		<CODE>- (void)<B>setCnt:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Set the count variable to an inputted value
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setCondbits:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setCondbits:">setCondbits:</A></H3><P>
		<CODE>- (void)<B>setCondbits:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Sets the number of bits. This is the number of aspect of the world that are monitored
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setConditions:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setConditions:">setConditions:</A></H3><P>
		<CODE>- (void)<B>setConditions:</B>(int *)<EM>x</EM>
			
		</CODE><P>
		Rather than individually set bits one by one, we might want to set 
all of them at once. That means we pass in a pointer to an array of 
words that is the &quot;right size&quot; for all the bits.
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setConditionsWord:To:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setConditionsWord:To:">setConditionsWord:To:</A></H3><P>
		<CODE>- (void)<B>setConditionsWord:</B>(int)<EM>i</EM> <B>To:</B>(int)<EM>value</EM>
			
		</CODE><P>
		For low level access to a full word's-worth of the condition
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setConditionsbit:FromZeroTo:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setConditionsbit:FromZeroTo:">setConditionsbit:FromZeroTo:</A></H3><P>
		<CODE>- (void)<B>setConditionsbit:</B>(int)<EM>bit</EM> <B>FromZeroTo:</B>(int)<EM>x</EM>
			
		</CODE><P>
		If a <I>bit</I> is currently set to 0 (&quot;don't care&quot;), then change it to 
something else (1 or 2)
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setConditionsbit:To:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setConditionsbit:To:">setConditionsbit:To:</A></H3><P>
		<CODE>- (void)<B>setConditionsbit:</B>(int)<EM>bit</EM> <B>To:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Sets the value of a <I>bit</I> in the conditions
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setCondwords:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setCondwords:">setCondwords:</A></H3><P>
		<CODE>- (void)<B>setCondwords:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Sets the number of words-worth's of conditions that are going to be used
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setCval:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setCval:">setCval:</A></H3><P>
		<CODE>- (void)<B>setCval:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set c coefficient from demand equation
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setForecast:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setForecast:">setForecast:</A></H3><P>
		<CODE>- (void)<B>setForecast:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set the forecast of this object to an inputted value
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setLastactive:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setLastactive:">setLastactive:</A></H3><P>
		<CODE>- (void)<B>setLastactive:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Set the time on which this forecast was last active to an input value
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setLforecast:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setLforecast:">setLforecast:</A></H3><P>
		<CODE>- (void)<B>setLforecast:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set the previous forecast of this object to an inputted value
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setNNulls:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setNNulls:">setNNulls:</A></H3><P>
		<CODE>- (void)<B>setNNulls:</B>(int)<EM>x</EM>
			
		</CODE><P>
		Null bits may be needed if the bit vector that is allocated is larger than the number of conditions being monitored. Since a bitvector allocates space in sizes of words, this might be important. Luckily, in the current design of ASM-2.0 (and after), there are no null bits.
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setSpecfactor:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setSpecfactor:">setSpecfactor:</A></H3><P>
		<CODE>- (void)<B>setSpecfactor:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set the specfactor value of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setSpecificity:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setSpecificity:">setSpecificity:</A></H3><P>
		<CODE>- (void)<B>setSpecificity:</B>(int)<EM>specificity</EM>
			
		</CODE><P>
		Set the <I>specificity</I> of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setStrength:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setStrength:">setStrength:</A></H3><P>
		<CODE>- (void)<B>setStrength:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set the strength value to an inputted value
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- setVariance:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/setVariance:">setVariance:</A></H3><P>
		<CODE>- (void)<B>setVariance:</B>(double)<EM>x</EM>
			
		</CODE><P>
		Set the variance of this forecast
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- switchConditionsbit:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/switchConditionsbit:">switchConditionsbit:</A></H3><P>
		<CODE>- (void)<B>switchConditionsbit:</B>(int)<EM>bit</EM>
			
		</CODE><P>
		Change a YES to a NO, and vice versa
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- updateForecastPrice:Dividend:"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/updateForecastPrice:Dividend:">updateForecastPrice:Dividend:</A></H3><P>
		<CODE>- (double)<B>updateForecastPrice:</B>(double)<EM>price</EM> <B>Dividend:</B>(double)<EM>dividend</EM>
			
		</CODE><P>
		Calculate new forecast on basis of <I>price</I> and <I>dividend</I> information
	
		<P><HR WIDTH=25% ALIGN=LEFT>
		<A NAME="- updateSpecfactor"></A><H3><A NAME="//apple_ref/occ/instm/BFCast/updateSpecfactor">updateSpecfactor</A></H3><P>
		<CODE>- (void)<B>updateSpecfactor</B>
		</CODE><P>
		Update the spec factor of this forecast. That means calculate: 
specfactor= (condbits - nnulls - specificity)* bitcost
	




<P><HR>
Version 1.1 Copyright &copy;2001.  All Rights Reserved.  
<P>
</BODY></HTML>