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# draw a plot-graph

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andreas kaffas 2020년 10월 18일
댓글: andreas kaffas 2020년 10월 18일
how can i draw a graph from this equation:F(n) = x2^3 − 3x1^2 + x3 ?
Can anyone explain?
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andreas kaffas 2020년 10월 18일
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 2020년 10월 18일
doc fimplicit3
##### 댓글 수: 2표시숨기기 이전 댓글 수: 1
andreas kaffas 2020년 10월 18일
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 2020년 10월 18일
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 ##### 댓글 수: 1표시숨기기 없음
andreas kaffas 2020년 10월 18일
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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