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draw a plot-graph

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andreas kaffas
andreas kaffas 18 Oct 2020
댓글: andreas kaffas 18 Oct 2020
how can i draw a graph from this equation:F(n) = x2^3 − 3x1^2 + x3 ?
Can anyone explain?

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KSSV
KSSV 18 Oct 2020
Define x2, x1, x3....what should be there range?
andreas kaffas
andreas kaffas 18 Oct 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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답변(2개)

madhan ravi
madhan ravi 18 Oct 2020
doc fimplicit3

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Walter Roberson
Walter Roberson 18 Oct 2020
This would be suitable if F(n) is some constant, such as if the equation is
andreas kaffas
andreas kaffas 18 Oct 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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Walter Roberson
Walter Roberson 18 Oct 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

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andreas kaffas
andreas kaffas 18 Oct 2020
thank you....there was a problem with the exercise and teachers uploaded another file in which the variables are defined!!

댓글을 달려면 로그인하십시오.

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