Justin Thank you for the help. I will try to examine further the customresponse option. Perhaps another expert will offer an answer.
Cheers, Itay On Tue, 27 Oct 2020, at 20:54, Justin Gray wrote: > This was in reply to your R example. I have just read your most recent > message. I am not sure how to provide more detailed feedback on the answer > input without using customresponse. My approach is usually to just provide > clear instructions to students on what is expected. > > Best, > Justin > -- > *Justin Gray* > Senior Lecturer | Department of Mathematics > Simon Fraser University | SCK 10531 > 8888 University Dr., Burnaby, B.C. V5A 1S6 > Canada > Simon Fraser University is located on the Unceded Coast Salish Territories of > the xʷməθkʷəy̓əm (Musqueam), Səl̓ílwətaʔ/Selilwitulh (Tsleil-Waututh), > Kwikwitlem, and Skwxwú7mesh Úxwumixw (Squamish) Peoples > > > On Tue, Oct 27, 2020 at 11:49 AM Justin Gray <jg...@math.sfu.ca> wrote: >> Perhaps you could do something with this: >> >> <problem> >> <script type="loncapa/perl">$ax=&random(1.0,10,0.1); >> $ay=&random(1.0,10,0.1); >> @args = ($ax, $ay); >> $answer = "Many answers are possible"; >> </script> >> <startouttext /> >> <p>Consider a vector <m eval="on">\( \vec{a} = $ax\hat{x} + $ay\hat{y} >> \)</m>'. >> Provide a vector <m>\( \vec{b} \)</m>, orthogonal to <m>\( \vec{a} \)</m>. >> </p> >> Enter the coordinates of <m>\( \vec{b} \)</m> separated by a comma. That is, >> answer in the form <font color="red"> <m>\( b_x, b_y \)</m></font>: >> <endouttext /> >> <mathresponse cas="maxima" answerdisplay="$answer" args="@args"> >> >> <answer>is(abs([LONCAPALIST[1],LONCAPALIST[2]].[RESPONSE[1],RESPONSE[2]]) < >> 0.001);</answer> >> <textline readonly="no" spellcheck="none" /> >> </mathresponse> >> </problem> >> >> Best, >> Justin >> >> -- >> *Justin Gray* >> Senior Lecturer | Department of Mathematics >> Simon Fraser University | SCK 10531 >> 8888 University Dr., Burnaby, B.C. V5A 1S6 >> Canada >> Simon Fraser University is located on the Unceded Coast Salish Territories >> of the xʷməθkʷəy̓əm (Musqueam), Səl̓ílwətaʔ/Selilwitulh (Tsleil-Waututh), >> Kwikwitlem, and Skwxwú7mesh Úxwumixw (Squamish) Peoples >> >> >> On Sat, Oct 24, 2020 at 4:15 AM Itay <it...@nospammail.net> wrote: >>> __ >>> Hi >>> >>> (Sorry for miswriting Justin's name in my previous message.) >>> I finally was able to get a working minimal example (see below). >>> >>> This modest success bring up a few follow-up questions that I hope that >>> list members could answer. >>> 1. How to test responder's input, e.g., for non-numeric submission? >>> Should I use the $submission variable with the initial <script> block? >>> 2. If the test should be done inside R : how to deliver the test results to >>> LC? >>> >>> I ask this because when I tested the ME below with various inputs that do >>> not follow the expected format (non-numeric values, missing input, etc.) I >>> got only one kind of warning 'Unable to understand formula'. >>> >>> I would like to be able to give a more granular feedback to the students, >>> in the spirit of the original ME. >>> >>> Thanks >>> Itay >>> >>> <problem> >>> <script type="loncapa/perl"> >>> $ax = &random(1.0, 10, 0.1); # Coordinates of \vec{a} >>> $ay = &random(1.0, 10, 0.1); >>> @avec = ($ax, $ay); >>> $answer="Chose b such that the scalar product with a is zero."; >>> </script> >>> >>> <startouttext /> >>> Consider a vector <m eval="on">\( \vec{a} = $ax\hat{x} + $ay\hat{y} >>> \)</m>'. >>> Provide a vector <m>\( \vec{b} \)</m>, orthogonal to <m>\( \vec{a} \)</m>. >>> <br /> >>> <endouttext /> >>> >>> <mathresponse answerdisplay="$answer" cas="R" args="@avec"> >>> <answer> >>> a <- c(LONCAPALIST[1],LONCAPALIST[2]); >>> b <- c(RESPONSE[1],RESPONSE[2]) ; >>> abs(sum(a*b))<0.001 >>> </answer> >>> <textline readonly="no" size="20" /> >>> </mathresponse> >>> </problem> >>> >>> >>> >>> >>> On Sat, 24 Oct 2020, at 13:35, Itay wrote: >>>> Just, >>>> Thank you for your reply. >>>> Following your suggestion I tried to create a minimal example based on the >>>> template >>>> Math Response using Computer Algebra System R >>>> Here, too, I am having difficulties. >>>> The minimal example is enclosed below. >>>> Typing the correct answer for vector b (ay, -ax) >>>> provokes the response >>>> Unable to understand formula. >>>> >>>> Note : the command delegated to R was tested directly with R. >>>> >>>> Thank you >>>> Itay >>>> >>>> >>>> <problem> >>>> >>>> <script type="loncapa/perl"> >>>> $ax = &random(1.0, 10, 0.1); # Coordinates of \vec{a} >>>> $ay = &random(1.0, 10, 0.1); >>>> @avec = ($ax, $ay); >>>> $answer="Chose b such that the scalar product with a is zero."; >>>> </script> >>>> >>>> >>>> <startouttext /> >>>> Consider a vector <m eval="on">\( \vec{a} = $ax\hat{x} + $ay\hat{y} >>>> \)</m>'. >>>> Provide a vector <m>\( \vec{b} \)</m>, orthogonal to <m>\( \vec{a} >>>> \)</m>. >>>> <br /> >>>> <endouttext /> >>>> >>>> <mathresponse answerdisplay="$answer" cas="R" args="@avec"> >>>> <answer> >>>> abs(sum(LONCAPALIST * RESPONSE))<0.001 >>>> </answer> >>>> <textline readonly="no" size="20" /> >>>> </mathresponse> >>>> >>>> </problem> >>>> >>>> >>>> >>>> >>>> On Fri, 23 Oct 2020, at 23:36, Justin Gray wrote: >>>>> I'm afraid I do not have an answer to your question, but have you >>>>> considered coding this problem as a mathresponse problem? >>>>> >>>>> Best regards, >>>>> Justin >>>>> -- >>>>> >>>>> *Justin Gray* >>>>> Senior Lecturer | Department of Mathematics >>>>> Simon Fraser University | SCK 10531 >>>>> 8888 University Dr., Burnaby, B.C. V5A 1S6 >>>>> Canada >>>>> >>>>> Simon Fraser University is located on the Unceded Coast Salish >>>>> Territories of the xʷməθkʷəy̓əm (Musqueam), Səl̓ílwətaʔ/Selilwitulh >>>>> (Tsleil-Waututh), Kwikwitlem, and Skwxwú7mesh Úxwumixw (Squamish) Peoples >>>>> >>>>> >>>>> On Fri, Oct 23, 2020 at 1:18 PM Itay <it...@nospammail.net> wrote: >>>>>> __ >>>>>> Hi >>>>>> >>>>>> I am trying to develop a custom response problem in which the student >>>>>> submission is a vector. >>>>>> A minimal example is provided below. >>>>>> Regardless of what I typed in the either of the two input fields I get >>>>>> the response: >>>>>> 'This question expects a numeric answer.' >>>>>> >>>>>> Please advise what am I doing wrong? >>>>>> >>>>>> Thanks in advance. >>>>>> Itay >>>>>> >>>>>> >>>>>> <problem> <!-- begin minimal --> >>>>>> <script type="loncapa/perl"> >>>>>> $ax = &random(1.0, 10, 0.1); # Coordinates of \vec{a} >>>>>> $ay = &random(1.0, 10, 0.1); >>>>>> </script> >>>>>> >>>>>> <startouttext /> >>>>>> Consider a vector <m eval="on">\( \vec{a} = $ax\hat{x} + $ay\hat{y} >>>>>> \)</m>'. >>>>>> Provide a vector <m>\( \vec{b} \)</m>, orthogonal to <m>\( \vec{a} >>>>>> \)</m>. >>>>>> <br /> >>>>>> <endouttext /> >>>>>> >>>>>> <customresponse id="dotProd"> >>>>>> <answer type="loncapa/perl"> >>>>>> for ($i=0; $i<2; $i++) { # Test input sanity. >>>>>> if ($submission[i] =~ /^\d+\s+\w+$/) { return 'UNIT_NOTNEEDED'; } >>>>>> if ($submission[i] !~ /^[\d\.]+$/) { return 'WANTED_NUMERIC'; } >>>>>> } >>>>>> >>>>>> # Is submission correct? >>>>>> $dotProd = $ax * $submission[0] + $ay * $submission[1]; >>>>>> if (abs($dotProd) < 1.0e-3) { return 'APPROX_ANS'; } # Can't >>>>>> expect EXACT_ANS. >>>>>> return 'INCORRECT'; >>>>>> </answer> >>>>>> >>>>>> <startouttext /><m>\( b_x = \)</m><endouttext /> >>>>>> <textline size="10" readonly="no" spellcheck="none" /> >>>>>> <startouttext /><br /><endouttext /> >>>>>> >>>>>> <startouttext /><m>\( b_y = \)</m><endouttext /> >>>>>> <textline size="10" readonly="no" spellcheck="none" /> >>>>>> <startouttext /><br /><endouttext /> >>>>>> </customresponse> >>>>>> </problem> <!-- end minimal --> >>>>>> >>>>>> >>>>> _______________________________________________ >>>>> 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 >>>> >>> > _______________________________________________ > 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