Dear Petr, you have to install the "foreach" library: http://cran.r-project.org/web/packages/foreach/foreach.pdf
I include the option %do% to execute the expression sequentially (see manual). I want to use foreach instead of for, because with "foreach" is possible to do a loop in parallel and I'm exploring it. Best regards, Marc 2014-02-11 12:02 GMT+01:00 PIKAL Petr <petr.pi...@precheza.cz>: > Why? > > Are you 100% sure that you need to use for loop? > > What is %do%, I did not find it among standard R functions? > > Regards > Petr > > > -----Original Message----- > > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > > project.org] On Behalf Of Marc Marí Dell'Olmo > > Sent: Tuesday, February 11, 2014 11:31 AM > > To: r-help@r-project.org > > Subject: [R] if(...){next} with "foreach" loop? > > > > Dear all, > > > > I want to do a loop with foreach. But, I would like to include a > > condition with "next" to don't loop over some elements. > > > > For example, I would like to translate this "for loop" to a "foreach > > loop": > > > > for (i in 1:10) { > > for (j in 1:2) { > > ... > > if((i==2 & j==1) | (i==4 & j==3)) { next } > > ... > > } > > } > > > > Foreach loop??? > > > > foreach (i = c(1:10)) %do%{ > > foreach (j = c(1:2)) %do%{ > > > > #I don't know how to include a "next"!! > > ... > > > > } > > } > > > > Thank you! > > > > Marc > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide http://www.R-project.org/posting- > > guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ________________________________ > Tento e-mail a jakékoliv k nìmu pøipojené dokumenty jsou dùvìrné a jsou > urèeny pouze jeho adresátùm. > Jestli¾e jste obdr¾el(a) tento e-mail omylem, informujte laskavì > neprodlenì jeho odesílatele. Obsah tohoto emailu i s pøílohami a jeho kopie > vyma¾te ze svého systému. > Nejste-li zamý¹leným adresátem tohoto emailu, nejste oprávnìni tento email > jakkoliv u¾ívat, roz¹iøovat, kopírovat èi zveøejòovat. > Odesílatel e-mailu neodpovídá za eventuální ¹kodu zpùsobenou modifikacemi > èi zpo¾dìním pøenosu e-mailu. > > V pøípadì, ¾e je tento e-mail souèástí obchodního jednání: > - vyhrazuje si odesílatel právo ukonèit kdykoliv jednání o uzavøení > smlouvy, a to z jakéhokoliv dùvodu i bez uvedení dùvodu. > - a obsahuje-li nabídku, je adresát oprávnìn nabídku bezodkladnì pøijmout; > Odesílatel tohoto e-mailu (nabídky) vyluèuje pøijetí nabídky ze strany > pøíjemce s dodatkem èi odchylkou. > - trvá odesílatel na tom, ¾e pøíslu¹ná smlouva je uzavøena teprve > výslovným dosa¾ením shody na v¹ech jejích nále¾itostech. > - odesílatel tohoto emailu informuje, ¾e není oprávnìn uzavírat za > spoleènost ¾ádné smlouvy s výjimkou pøípadù, kdy k tomu byl písemnì zmocnìn > nebo písemnì povìøen a takové povìøení nebo plná moc byly adresátovi tohoto > emailu pøípadnì osobì, kterou adresát zastupuje, pøedlo¾eny nebo jejich > existence je adresátovi èi osobì jím zastoupené známá. > > This e-mail and any documents attached to it may be confidential and are > intended only for its intended recipients. > If you received this e-mail by mistake, please immediately inform its > sender. Delete the contents of this e-mail with all attachments and its > copies from your system. > If you are not the intended recipient of this e-mail, you are not > authorized to use, disseminate, copy or disclose this e-mail in any manner. > The sender of this e-mail shall not be liable for any possible damage > caused by modifications of the e-mail or by delay with transfer of the > email. > > In case that this e-mail forms part of business dealings: > - the sender reserves the right to end negotiations about entering into a > contract in any time, for any reason, and without stating any reasoning. > - if the e-mail contains an offer, the recipient is entitled to > immediately accept such offer; The sender of this e-mail (offer) excludes > any acceptance of the offer on the part of the recipient containing any > amendment or variation. > - the sender insists on that the respective contract is concluded only > upon an express mutual agreement on all its aspects. > - the sender of this e-mail informs that he/she is not authorized to enter > into any contracts on behalf of the company except for cases in which > he/she is expressly authorized to do so in writing, and such authorization > or power of attorney is submitted to the recipient or the person > represented by the recipient, or the existence of such authorization is > known to the recipient of the person represented by the recipient. > [[alternative HTML version deleted]]
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