draw a plot-graph

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andreas kaffas
andreas kaffas el 18 de Oct. de 2020
Comentada: andreas kaffas el 18 de Oct. de 2020
how can i draw a graph from this equation:F(n) = x2^3 − 3x1^2 + x3 ?
Can anyone explain?
  2 comentarios
KSSV
KSSV el 18 de Oct. de 2020
Define x2, x1, x3....what should be there range?
andreas kaffas
andreas kaffas el 18 de Oct. de 2020
thank you....there was a problem with the exercise and teachers uploaded another file in which the variables are defined!!

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Respuestas (2)

madhan ravi
madhan ravi el 18 de Oct. de 2020
doc fimplicit3
  2 comentarios
Walter Roberson
Walter Roberson el 18 de Oct. de 2020
This would be suitable if F(n) is some constant, such as if the equation is
andreas kaffas
andreas kaffas el 18 de Oct. de 2020
thank you....there was a problem with the exercise and teachers uploaded another file in which the variables are defined!!

Iniciar sesión para comentar.


Walter Roberson
Walter Roberson el 18 de Oct. de 2020
If F(n) is not a constant, then you have the problem that you have three independent variables and one dependent variable. That would require 4 dimensional plots.
The closest you can get to 4 dimensional plots is to use isosurface() or slice() .
For example:
Fn = @(x1, x2, x3) x1.^2 - 2*x2.^3 + 3*x3/5 + 4;
[X1, X2, X3] = meshgrid(linspace(-2,2,25));
Z = Fn(X1, X2, X3);
for level = -13:5:25; isosurface(X1, X2, X3, Z, level); end
  1 comentario
andreas kaffas
andreas kaffas el 18 de Oct. de 2020
thank you....there was a problem with the exercise and teachers uploaded another file in which the variables are defined!!

Iniciar sesión para comentar.

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