[Jprogramming] crash

['Michael Day' via Programming]

Yes - it fails gracefully in JQt 807,  and it also fails in a reasonable 
fashion in the older
J701 on the iPad; I attempted to give an idea of J's error-handling in 
each version.
(12.4.5 is the version level of iPad's iOS operating system.)
I didn't try it in my own installation of 901,  assuming it would crash 
as it had for you.
However,  I HAVE now tried

     load 'plot'
     'ylog 1' plot 1 0 2

in a new JQt session of version 9.01 and find the same reasonable 
error-handling
behaviour as for version 8.07:  it does NOT crash on this machine/in 
this JQt 901
installation.
So maybe there's an installation problem in your case.
Cheers,
Mike


On 23/03/2020 10:51, Rudolf Sykora wrote:
> 'Michael Day' via Programming <programming at jsoftware.com> writes:
>
>> It's OK - well,  fails gracefully - in JQt 807 under Windows 10.
>> ...
>> while on my iPad,  iOS 12.4.5,  (typing what I see there)
>
> Do you mean that jqt807 on Win10 does not crash, while a newer J crashes
> on your iPad?
>
> I noticed more crashes in the past while trying to use 'plot', for me it
> is enough to
>      load 'plot'
>      plot 1 2; 3 4 5
>
> There is an error message and after like 2 seconds the whole session
> crashes. Do others also see this?
>
>
> A related question is, what ploting utility would you recommend for
> *interactive* investigation of data, that would easily cooperate with J,
> if possible.
> I know there is a gnuplot addon, for instance. Do you have any
> experience with it? (I would like to be able to zoom into parts of the
> graph, 'plot' does not allow this) Or do you just produce a data file
> and plot it seperately with a comletely external tool (matplotlib;
> roassal from smalltalk; some javascript in a browser like d3js...;
> grace)?
>
>
> Thank you
> Ruda
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