How to use a for loop to solve a function?
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Not sure where I'm going wrong. While loop works correctly, but not sure what's happening with the for loop.
x=linspace(0,20,20);
a=0;
while(a<=20)
y=x.^6-(3.*x).^2+3.^x-(230.*x);
a=a+1;
end
for j=1:20
y2(j)=100.*3log(j)-(2.*j);
end
When plotting, the while loop plots how it should, but nothing shows up for the for loop. Any guidance welcome. Thank you!
回答（1 个）
Ameer Hamza
2020-9-13
In your code, the while loop has no use. I think you wanted to write it like this
while(a<=20)
y(a)=x(a).^6-(3.*x(a)).^2+3.^x(a)-(230.*x(a));
a=a+1;
end
The for loop seems fine except there is a typing error. Following should work fine and you can plot the output
for j=1:20
y2(j)=100.*3*log(j)-(2.*j);
end
2 个评论
Jer D
2020-9-13
Ameer Hamza
2020-9-14
编辑：Ameer Hamza
2020-9-14
They are both visible, but y2 have very small values as compared to y, so it is on lower part axes (see the orange line on x-axes
x=linspace(0,20,20);
a=1;
while(a<=20)
y(a) = x(a).^6-(3.*x(a)).^2+3.^x(a)-(230.*x(a));
a=a+1;
end
for j=1:20
y2(j) = 100.*3*log(j)-(2.*j);
end
f = figure();
hold on;
plot(y);
plot(y2);
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2020-9-14
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