Stuart, Am I right in thinking that &submission is not an option for retrieving data from separate problems in a sequence as opposed to retrieving answers from other responses all in the same problem?
Doug Douglas Mills Director of Instructional Technologies Department of Chemistry University of Illinois dmi...@illinois.edu (217) 244-5739 On 12/11/14, 2:39 PM, "Stuart Raeburn" <raeb...@msu.edu> wrote: >Hi, > >> Any help or comments regarding any submission handling would be >>appreciated. > >The CAPA engine which determines correctness of submissions for >numericalresponse items (amongst others) tries its best to extract a >number from data submitted by the student. However, LON-CAPA >faithfully records the learner's actual submission. > >Accordingly, it is possible, as you have found, for a student to >provide some misshapen input in an initial part in a multi-part >problem, which LON-CAPA grades as correct, but then when you come to >use that submission in a perl script block for a subsequent part, it >does not behave as you might expect. > >See comment #3 in bug 6614 -- >http://bugs.loncapa.org/show_bug.cgi?id=6614#c3 > >There are three related enhancement requests: 6609, 6613 and 6614 (all >resolved in 2.11.0), with option (b) below. > >Your options are: > >(a) Include a preprocessor routine. (There is a problem template: >"Numerical Response with Pre-Processing" which is an example of this >functionality). The "preprocess" attribute was first included in >LON-CAPA 2.10.1 > >or > >(b) Retrieve the student's previously submitted data using >&submission() in place of &EXT(), and specify desired clean-up in the >optional fifth argument in the call to &submission(). This fifth >argument is a reference to a hash, with one or more of the following >keys => values: > > exponent => 1, comma => 1, letterforzero => 1, spaces => 1, format => >'ns' > (where n is an integer, i.e., number of significant digits). > >An example call, where part id of first part is "one", and response ID of >numericalresponse in that part is "11" would be: > >$first = &submission('one','11','','',{exponent => 1, comma => 1, >letterforzero >=> 1, spaces => 1, format => '3s'}); > >with spaces => 1 included: > >0. 44 in learner data would be converted to 0.44 > >This fifth argument in &submission() was first included in LON-CAPA >2.11.0. > >If you want to try this out, but your library server is running >2.10.1, visit: https://testdrive.loncapa.org/ and create a username >and authoring space in the testdrive domain (not connected to the main >LON-CAPA network) - running 2.11.0. > >or > >(c) Create your own clean-up routines (e.g., in a .library file) and >import the file into your problems, and then within the script block >call the routine you created to clean up the learner data. > >or some combination of two or more of (a), (b), and (c). > >Some time I ago I created a library file containing a routine: >&cleaneq() which could be used to clean up algebraic expressions. >This file is published source XML open, so select an author role, and >then browse the /res/msu/raeburn/ directory in the shared repository >with the "Source Available" checkbox checked, and you will be able to >click on "Source Code" to pop-open a window displaying the perl >regular expressions used in the cleaneq routine in the cleaneq.library >file. > > >Stuart Raeburn >LON-CAPA Academic Consortium > > >Quoting Bob Gonzales <rgon...@binghamton.edu>: > >> Hi, >> >> I'd like to look at the code that Loncapa uses to clean up submissions >>in >> numerical response problems. I'm referring to clean-up actions like >> converting exponents from '1x10^1' to '1e1' and removing leading '+' >>signs. >> >> We have some lab exercises in which we use the student's entered data >>in >> some numerical response problems. I'm getting the previously submitted >> data via the &EXT() function. >> >> Every once in a while a student will submit their data with something >>like >> a leading '+' sign, which Loncapa cleans up, and the data is accepted as >> correct. So, it would be good for me to do the same clean up before I >>use >> the submission. >> >> I've looked around in the system and I see some cleanup in the >> 'implicit_multiplication' routine in 'caparesponse.pm' but I'm not sure >> I'm even in the right place. >> >> Any help or comments regarding any submission handling would be >>appreciated. >> >> Thanks, >> Bob Gonzales >> Chemistry Dept >> Binghamton University > >_______________________________________________ >LON-CAPA-users mailing list >LON-CAPA-users@mail.lon-capa.org >http://mail.lon-capa.org/mailman/listinfo/lon-capa-users _______________________________________________ LON-CAPA-users mailing list LON-CAPA-users@mail.lon-capa.org http://mail.lon-capa.org/mailman/listinfo/lon-capa-users