Help Plotting Piecewise functions

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Brianna Selles
Brianna Selles 2019-9-1
评论： madhan ravi 2019-9-1
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)

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回答（2 个）

Walter Roberson
Walter Roberson 2019-9-1
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);
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Walter Roberson
Walter Roberson 2019-9-1
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')

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madhan ravi
madhan ravi 2019-9-1
编辑：madhan ravi 2019-9-1
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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