"Invalid use of operator."

¿Por qué me aparece el tipo de error "Invalid use of operator." al introducir la expresión Z=5*X.^2+5*Y.^2-X.*Y.-11*X+11*Y.+11 para generar gráficas de contorno? Muchas Gracia

Answer 1

[Arif Hoq]

if you want to perform element-by-element calculations with vectors, you should use a dot (.) before any multiplication (*), division (/), or power (^) operators that involve vectors. but not for addition, subtraction. that's why its showing error.

X=[5,7,8] ; % anyvalue
Y=[7,3,2]; % anyvalue
Z=5*X.^2+5*Y.^2-X.*Y-11*X+11*Y+11 

Z = 1×3

368 236 269