Getting rid of the for loop

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Max
Max 2015-11-7
编辑: Max 2015-11-10
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I'm having trouble getting rid of the for loop in my function. I have written out this code that works fine but I would like to get rid of the for loop and have it operate the same, i.e recursively. Thank you for the help in advance.

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Geoff Hayes
Geoff Hayes 2015-11-7
Max - please include all of your code and describe what the above is intended to do. It appears to be some sort of factoring (?) algorithm.
A recursive function for the above for loop could be
function [r,v] = getrv(q,qn,r,v)
if qn<=q+1
if r>q
vn = floor(r/q);
rn = 10*(r-vn*q);
else
vn = 0;
rn = 10*r;
end
[rn,vn] = getrv(q,qn+1,rn,vn);
r = [r rn];
v = [v vn];
end
and it would be called from your main function as
[r,v] = getrv(q,2,10*p,0);
Note how the recursive call to getrv is concatenated with the r and v inputs.
  4 个评论
Max
Max 2015-11-7
Sorry, I heavily modified the for loop you initially wrote it for. Would you be able to show me for this isolated section
i=1;
currentvalue(i)=(10^n)*p;
for i=1:(q+1)
quotient(i) = floor(currentvalue(i)/q);
Remainder(i) = currentvalue(i)-(quotient(i)*q);
currentvalue(i+1) = 10*Remainder(i);
end
Sorry for the bother but I would really appreciate it. Thank you.
Geoff Hayes
Geoff Hayes 2015-11-7
Max - use my example as a guide to modify the above code so that the for loop is replaced. Since you want to replace the above with a recursive function, ask yourself what should the inputs be to subsequent calls to the function? What should the output be? What is your stopping condition?

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