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Re: Apply Polyval to Array


From: Doug Stewart
Subject: Re: Apply Polyval to Array
Date: Sun, 12 Jun 2016 23:25:16 -0400



On Sun, Jun 12, 2016 at 10:03 PM, Thomas D. Dean <address@hidden> wrote:
I want to vectorize this:

p1 = [1,2,3;4,5,6;7,8,9];
for idx=1:3
  polyval(p1(idx,:),0)
endfor

cellfun("polyval",{p1},{[0;0;0]}); ## fails
arrayfun("polyval",p1,0 "UniformOutput",false)); ## wrong
arrayfun("polyval",p1,zeros(3,3), "UniformOutput",false); ## wrong

Tom Dean

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does this help

p1 = [1,2,3;4,5,6;7,8,9];
t=[1 2 3]
f=@(t) polyval(p1(t,:),0)
arrayfun(f,t)

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