delay

[Fio]

Hi there,
I have a quite simple question as I am a beginner. I try to use the level of the period before (in t I need t-1 to calculate the interest which is paid on the stock from the period before) but I cannot figure out how that works. I do not want to use the delay thing as it is, as far as I unterstand, an exponential delay.
Could you help me? Thanks Fio

[Administrator]

Does DELAY FIXED do what you want?

[bob@vensim.com]

Note that for difference equations (TIME STEP = 1) then using

previous value = INTEG(current value - previous value)/TIME STEP,current value)

gives you a 1 period delay. This is the same as SMOOTH or DELAY1.