Trouble using ezplot and matlabFunction on a symbolic function defined using symengine "piecewise"
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syms x t;
MP_syntax1 = 'piecewise([x <= 10, x/10], [10 < x <= 30, (30 - x)/20])';
MP_syntax2 = 'ilaplace(2/s^3,s,t)';
f(x) = evalin(symengine,MP_syntax1);
g(t) = evalin(symengine,MP_syntax2);
No trouble with g(t) or other MuPad functions:
ezplot(g(t), [-5,5]);
G = matlabFunction(g(t));
Trying the same to the piecewise, f(x) will not work however.
ezplot(f(x),[0,30]);
F = matlabFunction(f(x));
However, this works
xd = 0:0.1:30;
fd = double(f(xd));
plot(xd,fd);
What is wrong with the other calls using ezplot and matlabFunction for f(x) ?
4 个评论
Geoff Hayes
2015-3-29
Ronny - what do you mean by f(x) will not work? Are you observing an error or something else?
Ronny Landsverk
2015-3-30
Vishal Tripathi
2016-3-3
I am having a similar error. Any solution yet?
Sarah Palfreyman
2016-3-7
Try the new fplot family of functions in R2016a.
采纳的回答
Sally Al Khamees
2016-12-23
编辑：Sally Al Khamees
2017-2-21
0 个投票
If you have R2016b and the Symbolic Math Toolbox installed, you can just use the piecewise function:
For example:
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