Tengo problemas con el comando plot y no sé por qué

Question

javiera opazo garcía 2022-5-2

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回答： Paras Gupta 2023-10-19

Quiero graficar una señal seno perfecta, que se vea curvilinea, y por supuesto para eso necesito colocar varios tiempos... y cuando trato de agregarle más tiempos entre medio, me sale error, de que la dimensión del largo del vector debe ser correspondiente, y no entiendo por qué, si mi código no es distinto a otros que he hecho antes.

>> t=0:0.1:10;

%para el v0 en la resistencia:

w=5000/11;

y=1/sqrt(2)*sin(w*t+pi/4);

%para el v0 en el capacitor:

z=1/sqrt(2)*sin(w*t+3*pi/4);

>> plot(t,y)

>> t=0:0.01:10;

>> plot(t,y)

Error using plot

Vectors must be the same length.

>> t=0:0.01:100;

>> plot(t,y)

Error using plot

Vectors must be the same length.

>> t=0:0.1:100;

>> plot(t,y)

Error using plot

Vectors must be the same length.

Por favor, que alguien me diga cómo arreglar esto, gracias.

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Answer 1

Paras Gupta 2023-10-19

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Hi,

I understand that you are getting an error while plotting when you try to change the time range with a smaller step size.

The error occurs because changing the step size of the time values alters the length of the 't' vector, while the 'y' and 'z' vectors remain the same length. This mismatch in vector lengths causes the error.

To resolve this, you need to recalculate the 'y' and 'z' vectors using the updated time values. You can refer to the following code to achieve the same.

t = 0:0.1:10;

w = 5000/11;

y = 1/sqrt(2) * sin(w*t + pi/4);

z = 1/sqrt(2) * sin(w*t + 3*pi/4);

plot(t, y)

% Update time values and recalculate the signals

t_new = 0:0.01:10;

y_new = 1/sqrt(2) * sin(w*t_new + pi/4);

z_new = 1/sqrt(2) * sin(w*t_new + 3*pi/4);

figure % Create a new figure

plot(t_new, y_new)

Hope this answer resolves your query.