<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><div><blockquote type="cite" class="clean_bq" style="color: rgb(0, 0, 0); font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">For a given data.table, is there any condition … Ergo, it's a bug, right? </blockquote></div><p>Yes.</p><div><div><blockquote type="cite" class="clean_bq" style="color: rgb(0, 0, 0); font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); ">I'll be glad <br>to try to boil this down to something that's reproducible. </blockquote></div><p>That'd be great.</p><div><br class="Apple-interchange-newline"></div></div></div> <div id="bloop_sign_1403255739906665984" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">Arun</div></div> <div style="color:black"><br>From: <span style="color:black">Michael Smith</span> <a href="mailto:my.r.help@gmail.com">my.r.help@gmail.com</a><br>Reply: <span style="color:black">Michael Smith</span> <a href="mailto:my.r.help@gmail.com">my.r.help@gmail.com</a><br>Date: <span style="color:black">June 20, 2014 at 5:37:24 AM</span><br>To: <span style="color:black">datatable-help@lists.r-forge.r-project.org</span> <a href="mailto:datatable-help@lists.r-forge.r-project.org">datatable-help@lists.r-forge.r-project.org</a><br>Subject: <span style="color:black"> Re: [datatable-help] Bug when Merging with nomatch=0 and roll=T? <br></span></div><br> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>So let me rephrase my question (haven't received an answer so far):
<br>
<br>For a given data.table, is there any condition under which the lengths
<br>of the vectors in each column may differ? Based on my understanding,
<br>each data.table is also a data.frame, and with a data frame this should
<br>not be possible. For example, it's not possible to have a data.frame
<br>where the first column is a vector of length eight, and the second
<br>column is a vector of length nine. Ergo, it's a bug, right?
<br>
<br>If my understanding is correct, please do let me know and I'll be glad
<br>to try to boil this down to something that's reproducible.
<br>
<br>Thanks,
<br>M
<br>
<br>On 06/19/2014 11:59 AM, Michael Smith wrote:
<br>> By the way, I know it's not reproducible with the code below. Before
<br>> going into further detail, I first wanted to ask whether this looks like
<br>> a bug, or whether I've overlooked something obvious and this is expected
<br>> behavior.
<br>>
<br>> Thanks,
<br>> M
<br>>
<br>> On 06/19/2014 11:51 AM, Michael Smith wrote:
<br>>> I got the following result on my keyed data tables `CS` and `SP`, which
<br>>> seems like a bug (in 1.9.2 and 1.9.3 dev version) to me, since all
<br>>> columns should have the _same_ length:
<br>>>
<br>>>> ## Works as expected:
<br>>>> all((l <- sapply(CS[SP, roll = TRUE], length)) == l[1])
<br>>> [1] TRUE
<br>>>> ## Works as expected:
<br>>>> all((l <- sapply(CS[SP, nomatch = 0], length)) == l[1])
<br>>> [1] TRUE
<br>>>> ## Here's the potential _bug_, when combining both:
<br>>>> all((l <- sapply(CS[SP, nomatch = 0, roll = TRUE], length)) == l[1])
<br>>> [1] FALSE
<br>>>
<br>>>
<br>>> Thanks,
<br>>>
<br>>> M
<br>>>
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