Scaling up without a loop (Math question)

Question

Kelsey Allis 2021-2-7

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/738252-scaling-up-without-a-loop-math-question

回答： Walter Roberson 2021-2-7

Hello,

I need to find a way to scale the x - value back up without using a loop. After the while loop runs and x = sum((x .^ n )./ factorial(n)), I have to scale it back up by squaring it as many times as the while loop ran. My instructor does not want me to do a loop to do this, but I am not sure how to keep squaring the value c times without a loop. Any feedback would be appreciated!

a = x ;

c = 0 ;

n = [ 0 : 14 ] ;

while ( abs(x) >= 1/2)

x = x/2 ;

c = c + 1 ;

end

x = sum((x .^ n )./ factorial(n))

est = x^2*(c+1) ;

% for i = 1 : (c-1)

%est = est^2 ;

act = exp(a)