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.TH varn 1 "April 1993" "Scilab Group" "Scilab Function"
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varn - symbolic variable of a polynomial
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: polynomial (or matrix polynomial)
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: polynomial or polynomial matrix
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: symbolic variable (character string)
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: matrix or polynomial matrix
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\fVsymb=varn(p)\fR returns in \fVsymb\fR the symbolic variable of the polynomial \fVp\fR
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(i.e. \fVvarn(poly(0,'x'))\fR is \fV'x'\fR).
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\fVvarn(x,'s')\fR returns a polynomial matrix with same coefficients
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as \fVx\fR but with \fV's'\fR as symbolic variable (change of variable name).
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s=poly(0,'s');p=[s^2+1,s];
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\fVvarn(p)\fR is the string \fV's'\fR and \fVvarn(p,'x')\fR is the polynomial matrix