[英]Fibonacci function in matlab / octave
Help with Fibonacci function in octave / matlab. 八度/ Matlab中的斐波那契函数帮助。 The Fibonacci pattern is http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibtable.html 斐波那契模式是http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibtable.html
0 : 0
1 : 1
2 : 1
3 : 2
4 : 3
5 : 5
The function I have works but it skips a one
how can I fix this so the function correctly follows the list above? 我拥有的功能正常运行,但它跳过了one
该如何解决此问题,使功能正确地遵循上面的列表? Below is what my function creates. 以下是我的函数创建的内容。
0 : 0
1 : 1
2 : 2
3 : 3
4 : 5
5 : 8
See function below 见下面的功能
function f = rtfib(n)
if n<0
multi=-1; %if neg number store neg in multi variable
n=abs(n); %if neg make pos
else
multi=1;
end
if (n == 0)
f = 0;
elseif (n==1)
f=1;
elseif (n == 2)
f = 2;
else
fOld = 2;
fOlder = 1;
for i = 3 : n
f = fOld + fOlder;
fOlder = fOld;
fOld = f;
end
end
f=f*multi; %put sign back
end
Ps: I'm using octave 4.0 which is similar to matlab ps:我使用的是与Matlab相似的octave 4.0
Original code found from Create faster Fibonacci function for n > 100 in MATLAB / octave 在MATLAB / octave中为n> 100创建更快的Fibonacci函数找到原始代码
The function you provided assumes the 3rd item of the 0-starting Fibonacci sequence is 2, and that is wrong. 您提供的函数假定从0开始的斐波那契数列的第3项是2,这是错误的。 Just change that. 只是改变它。
function f = rtfib(n)
if n<0
multi=-1; %if neg number store neg in multi variable
n=abs(n); %if neg make pos
else
multi=1;
end
if (n == 0)
f = 0;
elseif (n==1)
f=1;
elseif (n == 2)
f = 1; % its 1
else
fOld = 1; % 1 again.
fOlder = 1;
for i = 3 : n
f = fOld + fOlder;
fOlder = fOld;
fOld = f;
end
end
f=f*multi; %put sign back
end
Now it works: 现在可以正常工作:
for ii=0:15
r(ii+1)=rtfib(ii);
end
disp(r)
0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610
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