vectors must be the same length

I'm trying to create a graph but the code is getting teh error above.

x = [3.15647 4.15647 5.15647 6.15647 7.15647]; y = [4.15280 5.88409 7.81539 5.24301 4.09266];

plot(x,y,'o'); hold on

xa = linspace(0, 0.5, 10) ya = 4.15+(1.73.*(x-3.15))+(0.1.*(x-3.15).*(x-4.15)); plot(xa,ya,'-');

Answer 1

[Star Strider]

You probably want to use ‘xa’ rather than ‘x’ in your ‘ya’ calculation:

ya = 4.15+(1.73.*(xa-3.15))+(0.1.*(xa-3.15).*(xa-4.15));

Answer 2

[Rik]

You used the variable x in your definition of ya, which results in xa being length 10 and ya being length 5.

x = [3.15647 4.15647 5.15647 6.15647 7.15647];
y = [4.15280 5.88409 7.81539 5.24301 4.09266];
xa = linspace(0, 0.5, 10);
ya = 4.15+(1.73.*(xa-3.15))+(0.1.*(xa-3.15).*(xa-4.15));
plot(x,y,'o',xa,ya,'-')

(Also, next time, select your code and push the {}Code button to correctly format your code)