[LON-CAPA-users] cleaning up submissions for numerical response problems

[Bob Gonzales]

Stuart,

Thanks for the help.  I'll start experimenting with the &submission in 2.11
on the testdrive server since we aren't going to be able to update our
servers to 2.11 until our break in May.


Bob Gonzales
Chemistry Dept
Binghamton University

On Thu, Dec 11, 2014 at 3:39 PM, Stuart Raeburn <raeburn at 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 <rgonzal at 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
>>
>
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