optim function: how to restrict number of decimal places?

Asked Jan 20 '23 at 10:56

Active Jan 20 '23 at 15:54

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I am using the optim function in R to analyze how people percieve distributions. My usual code looks like this: val.FR<-optim(par=0, fn=Frequency.Regression, method=c("Brent"), lower = 0, upper = 1)

It seems like optim is increasing the parameter from 0 to 1 in very small steps. However I only need accuracy to the second digit after the decimal. Everything better than a 0.01 increase of the parameter is unnecessary. Can anyone tell me how to restrict the optimization process to two digits after the decimal?

I tried googling the problem and played around with reltol and abstol but with no success :/

edited Jan 20 '23 at 15:54

Carl Witthoft

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asked Jan 20 '23 at 10:56

Jonas

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try to add: , control = list(maxit = 100, parscale = 0.01)) – Beeflight31 Jan 20 '23 at 11:03
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Please provide enough code so others can better understand or reproduce the problem. – Community Jan 20 '23 at 13:00
Why is this a problem? Are you running into long runtimes? – Carl Witthoft Jan 20 '23 at 15:55

optim function: how to restrict number of decimal places?

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