psubst.m

Version 1.0.0.0 (612 Bytes) by J.D. Hol & J.O. Entzinger
substitutes one polynomial in another
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Updated 18 Dec 2001

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PSUBST Solve p1 o p2

PSUBST(p1,p2) returns the polynomial coefficients for p1 o p2, i.e. returns p2 subsituted for the variable of p1. The resulting vector is length (LENGTH(p1)-1)*(LENGTH(p2)-1)+1.

For example:
p1=f(y), p2=f(x) ==> PSUBST(p1,p2)=p1(p2(x))

p1=y^2+4y+6, p2=x+1 ==> PSUBST(p1,p2)=x^2+6x+11

J.D. Hol & J.O. Entzinger

Cite As

J.D. Hol & J.O. Entzinger (2026). psubst.m (https://www.mathworks.com/matlabcentral/fileexchange/1161-psubst-m), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R11
Compatible with any release
Platform Compatibility
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Version Published Release Notes
1.0.0.0