phasemag phase and magnitude computation [phi,db]=phasemag(z [,mod]) z matrix or row vector of complex numbers. mod character string mod='c' "continuous" representation between -infinity and +360 degrees (default) mod='m' representation between -360 and 0 degrees phi phases (in degree) of z. db magnitude (in Db) phasemag computes the phases and magnitudes of the entries of a complex matrix. For mod='c'phasemag computes phi(:,i+1) to minimize the distance with phi(:,i), i.e. it tries to obtain a "continuous representation" of the phase. To obtain the phase between -%pi and %pi use phi=atan(imag(z),real(z)) s=poly(0,'s'); h=syslin('c',1/((s+5)*(s+10)*(100+6*s+s*s)*(s+.3))); [frq,rf]=repfreq(h,0.1,20,0.005); plot2d(frq',phasemag(rf,'c')'); s=poly(0,'s'); h=syslin('c',1/((s+5)*(s+10)*(100+6*s+s*s)*(s+.3))); [frq,rf]=repfreq(h,0.1,20,0.005); plot2d(frq',phasemag(rf,'m')'); repfreq gainplot atan bode