Peter, Thank you for your help. Although I can see and try out your problem, and I can see that you are sharing your xml code, I don't see where I can see your xml code within the LON-CAPA environment.
Should I be able to copy your code and include it in a problem of mine for syntax checking? And if so, do I site the original code? (I am very new to LON-CAPA, and if there is a standard practice I would like to know what it is.) Angus. On 13-10-30 7:50 PM, "Peter Dencker" <denc...@math.uni-luebeck.de> wrote: > > Hi, > > I don't think that it is helpful to give hints for syntactically > correct but semantically incorrect submissions: How can one know > what the student means? Students have to learn to produce valid > expressions. One could write simple problems for that purpose and > a short manual. > > In my option using customresponse is the appropriate method. > You can find an example (source available) how to check your > mentioned most common syntax problems in > > 'scl/dencker/testing/examples/simple syntax check 1.problem' > > This example is a (hopefully correct) reduction of a more > ambitious library. The library has to be rewritten and is not finished > yet - to put it mildly. I will keep you informed ... > > - Peter > > > Am 21.10.2013 16:23, schrieb Angus Findlay: >> When I give students formula response questions some of them don¹t submit >> valid mathematic expressions. The most common problems are: >> >> 1) Not having balanced brackets. (i.e. number of left brackets do not match >> number of right brackets) >> 2) Including invalid characters, such as quotation signs. >> 3) Not including brackets, when necessary. (eg. 2^-1/2 instead of 2^(-1/2)) >> >> I want to tell them that the expression is invalid, tell them why, and allow >> them to enter it again, without penalty. (Right now my LON-CAPA server times >> out on them, and asks them to try again later.) >> >> Is there a piece of standard code I can use for this, or if not, what it the >> easiest to implement a solution to this? >> >> Thanks in advance. >> >> Respectfully, >> ---------------------------------------------- >> Mr. Angus Findlay >> Math Department, Mount Allison University >> Sackville, New Brunswick >> >> email: afind...@mta.ca tel: 506-364-2592 >> ---------------------------------------------- >> >> >> >> >> _______________________________________________ >> 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
