r - `quantmod`'s `getSymbols.FRED` not working as expected -

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this question has answer here:

the following lines quantmod's manual (p54):

library(quantmod) getsymbols('cpiaucns',src='fred')

returns:

error in download.file(paste(fred.url, "/", symbols[[i]], "/", "downloaddata/",  :    cannot open url 'http://research.stlouisfed.org/fred2/series/cpiaucns/downloaddata/cpiaucns.csv'

how fix this?

(using latest version of both r , quantmod)

use https:// url instead.


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