this programme in matlab 2017b but icant run it

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Aalaa Abu alrob
Aalaa Abu alrob 2018-8-13
评论： Walter Roberson 2018-8-14
syms x;
syms E;
syms a;
p(x) =(sqrt(2*(E-potential(x,a))))
q = integral(p(x),0,x)
function [v] = potential(a,x)
v= a.*x
end
  2 个评论
Rik
Rik 2018-8-13
Today I formatted your code. Next time, you can do it yourself by selecting your code and pushing the {}Code button.
Rik
Rik 2018-8-13
What is the error you are getting? You can run scripts that contain functions since R2016b, so that isn't the problem. I don't have the symbolic toolbox, so I can't check the code itself for you.

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采纳的回答

Tiasa Ghosh
Tiasa Ghosh 2018-8-13
For using Integral (), you must describe 'p' as a function handle with the '@' notation.Like this:
p = @(x) sqrt(2*(E-potential(x,a)));
This will work for Integral(). However, your second input to integral is 'x' which a symbolic variable. But Integral() accepts only scalar values as input. You need to change that.
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Aalaa Abu alrob
Aalaa Abu alrob 2018-8-14
Thanks for your attention .. but my integral is with respect to x.. and other sympoles are constant
Walter Roberson
Walter Roberson 2018-8-14
Your a is not constant, it is an unresolved symbolic variable.

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更多回答（1 个）

Walter Roberson
Walter Roberson 2018-8-13
p is defined in terms of the symbolic variable a. integral() is for numeric integration and cannot be used with unresolved symbolic variables.
Please recheck the order of parameters for your function. You define the function with one order but you call it with a different order.

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