why is rejection sampling used what is the gamma function in r as an envelope? what is the envelope in r what kind of sampling is used to generate exponential what's the difference between gamma exponential or inverse gamma exponential? how is gamma exponential does rejection sampling generate exponential draw in r what makes gamma exponential how to generate draws using unit exponential which exponential function does a rejection sampling function use what is gamma exponential how can an exponential draw from a gamma why use rejection sampling which exponential functions are envelopes which of the following gammas is a rejection sampling function? can gamma exponential be used with reject sampling how do you generate units with an inverse gamma exponential function what kind of transforms do gamma function need to perform can rejection sampling generate exponentials in r how to use rejection sampling to generate exponential draws?