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The Maxima on-line user's manual

Algebra Calculator

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Abs

Function: abs (<expr>) Returns the absolute value <expr>. If <expr> is complex, returns the complex modulus of <expr>.

H(a1,a2,b0,b1,b2,z):=(b0+b1*z^(-1)+b2*z^(-2))/(1+a1*z^(-1)+a2*z^(-2));
H1(f,F0):=H(-1.978882,0.979126,0.989502,-1.979004,0.989502,exp(%i*2*%pi*f/F0));
plot2d([abs(H1(f,16000)),abs(H1(f,20000))],[f,0,500]);
float(abs(H1(50,16000)));
float(abs(H1(50,20000)));

There are also some inexact matches for abs. Try ?? abs to see them.

(%o1)                                true
(%i2) 

Related Examples

abs-radcan

A:1/(1+2*%i*k/k0);

B:radcan(A+1);

radcan(abs(A));

Calculate

abs-define

define(g(x), abs(4*x/...

s: find_roots(g(x)=3,...

Calculate

abs-float-linsolve-rhs

eq1: Vint=-Iint/(s*C);

eq2: Iint=k*Iin;

eq3: Iin=Vin/30000 + ...

Calculate

abs-define-diff

define(h(x), abs(2*x^...

define(hp(x), diff(h(...

Calculate

abs-cos-limit-sin

y: abs(x)/x;

limit(y,x,0,plus);

limit(y,x,0,minus);

Calculate

abs-float-plot2d
plot2d (1/float(abs(parallel(RB,ZC(C1,x)))), [x, 0, 1e7], [logx,logy]);

RB:10000;

C1:22e-9;

parallel(a,b):=1/(1/a...

Calculate

abs-cos-sin-subst

f:a*sin(x)+b*cos(x);

a1:subst(x=%pi/2,f);

s1:a1/abs(a1);

Calculate

abs-define-float-realroots

define(f(x),(x^4+3*x^...

define(g(x), abs(4*x/...

g(-%e);

Calculate

abs

f(x):=x^2-4;

root(a,b):=b-((f(b)*(...

root(2.1,1.9048);

Calculate