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What's the error in this program

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Syed Muhammad Umar
Syed Muhammad Umar 2015-10-6
关闭： MATLAB Answer Bot 2021-8-20
x=0;
dt=1;
while x<=120
y=325*x;
x=x+dt;
plot(x,y)
end
title('Mothly loan vs commulative payment');
xlabel('Monthly loan' );
ylabel('Commulative payment' );

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回答（2 个）

Star Strider
Star Strider 2015-10-6
It’s generally not a good idea to put a plot in a loop (unless you want to animate the plot).
This seems to work:
x=0;
dt=1;
k1 = 1;
while x<=120
y(k1)=325*x(end);
x(k1)=x(end)+dt;
k1 = k1 + 1;
end
plot(x,y)
title('Mothly loan vs commulative payment');
xlabel('Monthly loan' );
ylabel('Commulative payment' );
Image Analyst
Image Analyst 2015-10-6
You didn't index x or y inside the loop. But better yet, why not just vectorize it, and not even use a while loop?
dt=1;
x = 0 : dt : 120;
y=325*x;
plot(x,y, 'b.-');
grid on;
title('Mothly loan vs commulative payment');
xlabel('Monthly loan' );
ylabel('Commulative payment' );

此问题已关闭。

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