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The Maxima on-line user's manual

Algebra Calculator

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Cabs

Function: cabs (<expr>) Returns the complex absolute value (the complex modulus) of <expr>.

kill(all);
load("log10");
H1(s):= 1/((s/1000+1)^2);
H2(s):= (s/1000)/((s/1000+1)^2);
H3(s):= ((s/1000)^2)/((s/1000+1)^2);
H4(s):= H1(s)+H3(s);
plot2d([20*log10(cabs(H1(%i*f))),20*log10(cabs(H2(%i*f))),20*log10(cabs(H3(%i*f))),20*log10(cabs(H4(%i*f)))], [f, 10, 20000], [logx]);

(%o1)                                true
(%i2) 

Related Examples

cabs-carg-cos-fpprintprec-load-makelist-plot2d-sin
plot2d([discrete, t, S]);

load (fft) ;

sample : 64;

fpprintprec : 4 ;

Calculate

cabs-sqrt

express(cabs((1+sqrt(...

Calculate

cabs-exp-load-plot2d
plot2d([sdomain(H(f_to_w(%i*f))),sdomain(Hz(exp((%pi*%i*f)/48000)))], [f,10,24000], [logx, true]);

load("log10");

f_to_w(f):= 2*%pi*f;

sdomain(s):= 20*log10...

Calculate

cabs-ev-log-plot2d
plot2d(20*log(cabs(F(%i*2*%pi*10^x)))/log(10),[x,1,7]);

R1: 1.2;

L1: 1000e-12;

C1: 10e-6;

Calculate

cabs-carg-ev-load-log-numer-plot2d
plot2d(20 * log(cabs(T( %i * 2 * %pi * 10^x))) / log(10), [x,1,6]);

V_in:24;

V_out:150;

I_load: 0.1;

Calculate

cabs-first-kill-load-plot2d-solve
plot2d(dB(cabs(H(2*%pi*%i*f))),[f,10,20000],[logx,true]);

kill(all);

load("log10");

dB(x):= 20*log10(x);

Calculate

cabs-first-float-kill-load-plot2d-ratsimp-second-solve
plot2d(float(dB(cabs(H(2*%pi*%i*f)))),[f,10,20000],[logx,true]);

kill(all);

load("log10");

dB(x):= 20*log10(x);

Calculate