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1.40: code for natural logarithm and e^x exponential funct
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Ford Prefect
Guru
Joined: Sat Mar 01, 2008 12:52 pm Posts: 1030

1.40: code for natural logarithm and e^x exponential funct
hi, I'm not sure what RobotC really does or how to do this (although I strongly hope it's like the standard C commands do...) what is the correct RobotC code to obtain  the natural logarithm ln(x)  the e^x exponential function (2,718..^x)
_________________ regards, HaWe aka Ford #define S sqrt(t+2*i*i)<2 #define F(a,b) for(a=0;a<b;++a) float x,y,r,i,s,j,t,n;task main(){F(y,64){F(x,99){r=i=t=0;s=x/332;j=y/321;F(n,50&S){t=r*ri*i;i=2*r*i+j;r=t+s;}if(S){PutPixel(x,y);}}}while(1)}

Wed Aug 13, 2008 5:07 am 


Dick Swan
Creator
Joined: Fri Feb 09, 2007 9:21 am Posts: 616

Re: 1.40: code for natural logarithm and e^x exponential funct
ROBOTC firmware simply calls the standard C library functions for this with identical parameter.
Read up on these functions in a standard C programming text.

Wed Aug 13, 2008 9:10 am 


Ford Prefect
Guru
Joined: Sat Mar 01, 2008 12:52 pm Posts: 1030

Re: 1.40: code for natural logarithm and e^x exponential funct
thx, then everything is fine. exp(x)=e^x, and log(x) is ln(x)
_________________ regards, HaWe aka Ford #define S sqrt(t+2*i*i)<2 #define F(a,b) for(a=0;a<b;++a) float x,y,r,i,s,j,t,n;task main(){F(y,64){F(x,99){r=i=t=0;s=x/332;j=y/321;F(n,50&S){t=r*ri*i;i=2*r*i+j;r=t+s;}if(S){PutPixel(x,y);}}}while(1)}

Wed Aug 13, 2008 9:24 am 



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