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The Maxima on-line user's manual

Algebra Calculator

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Num

Function: num (<expr>) Returns the numerator of <expr> if it is a ratio. If <expr> is not a ratio, <expr> is returned.

aInitialValue_num: 1.0;
aFinalValue_num: 1.0;
aDuration_num: 4.0;
lSignedAmplitude_num: (aFinalValue_num - aInitialValue_num) / 2;
plot2d(aInitialValue_num + 0.5*sin(aCurrentTime_num / aDuration_num * %pi*2 - %pi/2),[aCurrentTime_num,0,aDuration_num]);

num evaluates its argument.

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

(%o1)                                true
(%i2) 

Related Examples

num-plot2d-sin
plot2d(aInitialValue_num + 0.5*sin(aCurrentTime_num / aDuration_num * %pi*2 - %pi/2),[aCurrentTime_num,0,aDuration_num]);

aInitialValue_num: 1.0;

aFinalValue_num: 1.0;

aDuration_num: 4.0;

Calculate

num-partfrac

num : 1-1*z-4*z^2+4*z^3;

den : 1-11/4*z+13/8*z...

partfrac(num/den, z);

Calculate

num-plot2d
plot2d(-(aCurrentTime_num * aDuration_num/2) ^ 2 + lSignedAmplitude_num,[aCurrentTime_num,0,aDuration_num]);

aInitialValue_num: 1.0;

aFinalValue_num: 1.0;

aDuration_num: 4.0;

Calculate

num-sum

num : sum(y[i] * t[i]...

Calculate

num-rat-rhs-solve-subst

mbc: (yc-yb)/(xc-xb);

mca: (ya-yc)/(xa-xc);

eq1: x+mbc*y-xa-mbc*ya;

Calculate

num-solve

f(x):=0.015*(x^4)-3;

solve(0.015*(x^4)-3=0...

solve(f(x)=0,x);

Calculate

num-solve

D:32;

solve([%pi*(D/2)^2*h=...

Calculate

num-plot2d-sin
plot2d(aInitialValue_num + sin(%pi / aCurrentTime_num),[aCurrentTime_num,0,aDuration_num]);

aInitialValue_num: 1.0;

aFinalValue_num: 1.0;

aDuration_num: 4.0;

Calculate

num-plot2d-sin
plot2d(aInitialValue_num + 1.0 + sin(aCurrentTime_num / aDuration_num * %pi*2 - %pi/2),[aCurrentTime_num,0,aDuration_num]);

aInitialValue_num: 1.0;

aFinalValue_num: 1.0;

aDuration_num: 4.0;

Calculate