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How can I change the radius of the spiral so it varies along the length from 0 to 1?

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Mara Pereira
Mara Pereira 2020-5-21
评论： Star Strider 2020-5-21
How can I change the radius of the spiral so it varies along the length from 0 to 1?
y=0:0.5:100;
n=length(y);
x=cos(y/100*10*pi);
z=sin(y/100*10*pi);
X=[zeros(1,n);x];
Y=[y;y];
Z=[zeros(1,n);z];
surf(X,Y,Z);
alpha(0.5);
view(75,15);

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Star Strider
Star Strider 2020-5-21
Change ‘x’ and ‘z’ to:
x=cos(y/100*10*pi).*(y/100);
z=sin(y/100*10*pi).*(y/100);
so the full code siis now:
y=0:0.5:100;
n=length(y);
x=cos(y/100*10*pi).*(y/100);
z=sin(y/100*10*pi).*(y/100);
X=[zeros(1,n);x];
Y=[y;y];
Z=[zeros(1,n);z];
surf(X,Y,Z);
alpha(0.5);
view(75,15)
.

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