ios - Number Generator wave cycle to graph output -

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i'm looking generate wave form generated cycle of numbers increase , decrease on given rate. frequency can vary between 1 40 per minute , amplitude varies between 100 , 3000. idea form breathing pattern "breaths per minute" (1-40) , inhaled volume per breath (100-3000).

i'm new here , can find random generators. have looked @ nstimer , uigraphs ios-developer tesla tutorial app.

could point me in right direction.

many thanks.


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