I would like to have questions in the survey conditional on a random number. As many have mentioned the rand() function is volatile such that it re-generates any time the survey is opened. Does anyone has a solution to this besides once(rand())? I am finding the once command unstable.
Hi EZ,
What do you mean by unstable? What version of ODK Collect are you
using? Do you have a short one or two question form that shows the
issue?
Yaw
···
On Tue, Sep 20, 2016 at 10:50 AM, EZ wrote: > I would like to have questions in the survey conditional on a random number. As many have mentioned the rand() function is volatile such that it re-generates any time the survey is opened. Does anyone has a solution to this besides once(rand())? I am finding the once command unstable. > > -- > -- > Post: opendatakit@googlegroups.com > Unsubscribe: opendatakit+unsubscribe@googlegroups.com > Options: http://groups.google.com/group/opendatakit?hl=en > > --- > You received this message because you are subscribed to the Google Groups "ODK Community" group. > To unsubscribe from this group and stop receiving emails from it, send an email to opendatakit+unsubscribe@googlegroups.com. > For more options, visit https://groups.google.com/d/optout.And note that once() should not be embedded within a formula.
create a calculated field with a formula once(...rand()...)
Then reference that field value elsewhere in the form.
···
On Thu, Sep 22, 2016 at 7:48 AM, Yaw Anokwa wrote:Hi EZ,
What do you mean by unstable? What version of ODK Collect are you
using? Do you have a short one or two question form that shows the
issue?Yaw
On Tue, Sep 20, 2016 at 10:50 AM, EZ evazleid@gmail.com wrote:
I would like to have questions in the survey conditional on a random
number. As many have mentioned the rand() function is volatile such that it
re-generates any time the survey is opened. Does anyone has a solution to
this besides once(rand())? I am finding the once command unstable.--
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--
Mitch Sundt
Software Engineer
University of Washington
mitchellsundt@gmail.com