Help Plotting Piecewise functions
이전 댓글 표시
I need help plotting the following piecewise function. I attatched the question.
This is what I have so far:
syms x
y = piecewise(0<=x<=3, 4*x^1/3, 3<x<=6, pi^x+e) % this is the line that is saying there is an error.
fplot(y)
답변 (2개)
Walter Roberson
2019년 9월 1일
Chaining equalities like that is only supported in very recent MATLAB. Also you are using the wrong exponent:
y = piecewise(0<=x & x<=3, 4*x^1/3, 3<x & x<=6, pi^(x+e))
If e is intended to be the base of the natural logs then chances are you are going to need to define e as e is not built-in constant in MATLAB. e = exp(1);
댓글 수: 9
Brianna Selles
2019년 9월 1일
Walter Roberson
2019년 9월 1일
y = piecewise(0<=x & x<=3, 4*x^1/3, 3<x & x<=6, pi^(x+exp(1)))
Question: what is the value of the function for negative x or x > 6 ?
Brianna Selles
2019년 9월 1일
Brianna Selles
2019년 9월 1일
Walter Roberson
2019년 9월 1일
No. Look carefully at the second equation. The x + e is all the same font size and is all raised higher than the pi.
. If it were pi^x+e then it would have been 
Brianna Selles
2019년 9월 1일
Brianna Selles
2019년 9월 1일
Walter Roberson
2019년 9월 1일
syms x
e = exp(1)
y = piecewise(0<=x & x<=3, 4*x^1/3, 3<x & x<=6, pi^(x+e))
fplot(y,'c')
madhan ravi
2019년 9월 1일
madhan ravi
2019년 9월 1일
편집: madhan ravi
2019년 9월 1일
You are almost there , change e to exp()
syms x
y = piecewise(0<=x<=3, 4*x^1/3, 3<x<=6, pi^(x+e)) % Note the parentheses around pi
fplot(y,'c') % change this line
doc fplot % to see more examples
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