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Re: Returning polynomial coefficients from matlabFunction as an array
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From: |
Colin Macdonald |
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Subject: |
Re: Returning polynomial coefficients from matlabFunction as an array |
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Date: |
Thu, 25 Aug 2016 09:30:46 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 |
On 25/08/16 04:50, iceman wrote:
the value of F returned should be
@(A, x) A11 .* x .^ 2 + A12 .* x + A13
where A = [A11,A12,A13]
How should I go about doing this ?
Here's one approach using num2cell:
>> tmp = function_handle(p)
tmp =
@(A11, A12, A13, x) A11 .* x .^ 2 + A12 .* x + A13
>> F = @(A,x) tmp(num2cell(A){:}, x)
F =
@(A, x) tmp (num2cell (A) {:}, x)
>> F([5, 7, 11], x)
ans = (sym)
2
5⋅x + 7⋅x + 11
>> F([5, 7, 11], 2)
ans = 45
This has some overhead, so maybe there is a better way.
Colin