converting a binary vector to polynomial form?

2013 4 24
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If i have a binary vector:
x = 1 0 0 1 0 1
how can i convert this to polynomial form:
y = x.^5+x.^2+1
regards.

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回答（1 个）

Walter Roberson
Walter Roberson 2013-4-24

0 个投票

If you have the Symbolic Toolbox, use poly2sym

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Malik
Malik 2013-4-24
i dont have it. isnt there an alternate to this.
Walter Roberson
Walter Roberson 2013-4-24
What output form are you looking for? A function handle? A string written to a file? Or you have a binary polynomial vector P and a matrix of values x and you want y to be the polynomial implied by P evaluated over x?
Malik
Malik 2013-4-25
i have a binary vector representing the 1 and 0 coefficients of a polynomial. i want to convert it to polynomial form, so that its easy for me to see the positions at which i have 1 as the co-efficient.
Walter Roberson
Walter Roberson 2013-4-26
You could just
find(fliplr(x)) - 1
which would, in this example, output 5 2 0
Anyhow, so you are looking for a string output ?

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Malik
Malik
2013-4-24

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