Bounds not working

[TimBock]

When I run the following, I get minimum and maximum weight values that are outside the bounds. Sorry if I've misunderstood the documentation...

library(icarus)
mar1 <- c("categ",3,80,90,60)
mar2 <- c("sexe",2,140,90,0)
mar3 <- c("service",2,100,130,0)
mar4 <- c("salaire", 0, 470000,0,0)
margins <- rbind(mar1, mar2, mar3, mar4)
wCal <- calibration(data = data_ex2,
marginMatrix = margins,
colWeights="poids",
method = "logit",
bounds = c(3, 38),
description=FALSE)
range(wCal)

[haroine]

Hi! Thanks for the reproducible example!

The bounds are actually on the g-weights (i.e. reweighting factor = w/d), which in this case refers to the vector wCal / data_ex2$poids

The problem as defined here does not actually have a solution, since margin on categ for example implies a constraint on total population of 230, but the min bound of 3 on the reweighting factor would mean an estimated pop total with calibrated weights of at least 3*230 = 690. What you observe here is thus a numerical aberration (icarus finds a numerical solution within the pre-set 1e-6 tolerance).

If what you want is the range of the final weight wCal between 3 and 38, since all initial weights are equal to 10 you can thus use:

bounds = c(0.3, 380)

which gives:

> range(wCal)
[1]  3.96063 39.08558

Hope it helps :)

[TimBock]

Ah! That helps a lot. Many thanks. Tim From: Antoine R <notifications@github.com> Sent: Tuesday, May 28, 2019 11:05 AM To: haroine/icarus <icarus@noreply.github.com> Cc: Tim Bock <tim.bock@displayr.com>; Author <author@noreply.github.com> Subject: Re: [haroine/icarus] Bounds not working (#10) Hi! Thanks for the reproducible example! The bounds are actually on the g-weights (i.e. reweighting factor = w/d), which in this case refers to the vector wCal / data_ex2$poids The problem as defined here does not actually have a solution, since margin on categ for example implies a constraint on total population of 230, but the min bound of 3 on the reweighting factor would mean an estimated pop total with calibrated weights of at least 3*230 = 690. What you observe here is thus a numerical aberration (icarus finds a numerical solution within the pre-set 1e-6 tolerance). If what you want is the range of the final weight wCal between 3 and 38, since all initial weights are equal to 10 you can thus use: bounds = c(0.3, 380) which gives:

range(wCal)

[1] 3.96063 39.08558 Hope it helps :) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#10>, or mute the thread<https://github.com/notifications/unsubscribe-auth/ADEF6QEWUVDS7U3BYOGW2WLPXSALZANCNFSM4HPZTCQA>.