Examples

In certain cases, such as boundary condition definitions, QuickField allows to use formulas. The Formula Syntax used by QuickField is quite simple. The table below contains examples you can use to learn writing your own QuickField formulas. The left column contains mathematical formulas with the corresponding QuickField expressions contained in its right counterpart.

Function

Plot

QuickField notation

100·t

100*t

t·(1 - t)·(2 - t)

t*(1-t)*(2-t)

2·t2 - t - 3

2*t^2 - t - 3

e-t 2/2

exp(-t^2 / 2)

log2t

log(t) / log(2)

sin t + cos t

sin(t) + cos(t)

200·sin(18000·t + 240)

200*sin(18000*t+240)

2t

2^t

arcsin(√t)

asin(sqrt(t))

tg t
2.4·10-8

tan(t / 2.4e-8)

|2π·t|

abs(2*pi*t)

t, if t < 0.5
1-t, if t ≥ 0.5

t*step(0.5-t) + (1-t)*step(t-0.5)

0, if t < 0
t, if 0 ≤ t < 0.5
1-t, if 0.5 ≤ t < 1
0, if t ≥ 1

t*impulse(t,0,0.5) + (1-t)*impulse(t,0.5,1)

sin(t), if sin(t) > cos(t)
cos(t), if sin(t) ≤ cos(t)

max(sin(t), cos(t))

t/2, if 0 ≤ t < 2
periodic with period 2

saw(t, 2)

10·e5t, if 0 ≤ t < 2
10, if 2 ≤ t < 3
periodic with period 3

10 * exp(5 * saw(t,2,1))
10·e5t, if 0 ≤ t < 2
0, if 2 ≤ t < 3
periodic with period 3

10 * exp(5 * saw(t,3)) * impulse(saw(t,3), 0, 2/3)
et-1, if 0 ≤ t < 1
e1-t, if 1 ≤ t < 2
periodic with period 2

exp(saw(t,1,1)-1) + exp(saw(2-t,1,1)-1) - exp(-1)

Symmetrical square wave

sign(sin(t))

Asymmetrical square wave

2*M*sign(saw(t,a,b)) - M + c

Triangle wave

2*M*saw(t+a,2*a,2*a) + 2*M*saw(-t-a,2*a,2*a) - M