[Jprogramming] JHS plot breakthrough

[Kip Murray]

At present JAL reports

Local JAL information was last updated: 02 Dec 2011 23:56:32
Installed addons are up to date, 47 addons are not yet installed.
The base library is up to date.

--I will check again in the morning -- it's near midnight here in Texas.

On 12/2/2011 11:16 PM, bill lam wrote:
> Thanks for report.  There was a bug in closepath and now fixed. Please update
> base libray, jhs and plot.
>
> The font should be smaller but broswers seem place a minimum for font
> size, please try configure the browser or test with other browsers to see
> if there will be any difference.
>
> Please also try plotdemos 34 to see if the orientation of vertical label
> text is correct or not in Firefox 8.  It is wrong in my linux FF8.
>
> Птн, 02 Дек 2011, Kip Murray писал(а):
>> Things work pretty well now but plot joins the last data point to the
>> first by a straight line segment.  For example
>>
>> plot (;*:) steps _1 2 100
>>
>> shows the graph of y = x^2 for x going from _1 to 2 together with a
>> straight line segment from the point 2 4 to the point _1 1.  In J602 the
>> same plot command draws the curve correctly, without that straight line
>> segment from the last point of the curve to the first point.
>>
>>
>> On 12/2/2011 7:07 PM, bill lam wrote:
>>> There was a mismatch for suffix htm vs html, please update plot package
>>> (to 1.0.17) and test again.
>>>
>>> Птн, 02 Дек 2011, Kip Murray писал(а):
>>>> The rough edges include absence of ~addons/ide/jhs/jplotdemos.ijs .  I
>>>> found jplotdemo.ijs and tried it instead.  After several iterations of
>>>> installing addons required by jplotdemo.ijs I was able to do
>>>>
>>>>       plotdemo
>>>> NB. requires JAL graphics/plot and graphics/afm installs
>>>> NB. requires JAL general/misc and math/misc installs
>>>> NB. plotdemos 0 through jplot 54 create html plot files
>>>>       plot 10?10
>>>>       plotdemos 1
>>>>       plotdemos 10
>>>>       plotdef 'show';600 300 NB. jhsshow width height
>>>>       plotdemos 10
>>>>       plotdef 'link';400 200 NB. jhslink
>>>>       plotdemos 25
>>>>       plotdef 'none';600 300 NB. create ~temp/plot.html without show or link
>>>>       plotdef 'show';600 300 NB. jhsshow
>>>>       plotdemos 54
>>>>
>>>> but none of the listed commands would work correctly with Google Chrome.
>>>>     For example,
>>>>
>>>>       plot 10?10
>>>>
>>>> led to a window with address http://127.0.0.1:65001/~temp/plot.html
>>>> and Chrome error message
>>>>
>>>> No data received
>>>> Unable to load the webpage because the server sent no data.
>>>> Here are some suggestions:
>>>> Reload this webpage later.
>>>> Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection
>>>> without sending any data.
>>>>
>>>> This was a typical response to the commands I tried.
>>>>
>>>> However, when I used Windows Explorer to find file
>>>>
>>>> C:\Users\Kip Murray\j701-user\temp\plot.htm
>>>>
>>>> and clicked on the file name in Windows Explorer, a J Plot window opened
>>>> showing a jagged line plot passing through ten random points, on a
>>>> "graph paper" grid with labels i.10 on the x and y axes.
>>>>
>>>> So something is working!
>>>>
>>>> It appears to me ~temp/plot.html was incorrect identification of the
>>>> html file.
>>>>
>>>>
>>>> On 12/2/2011 12:34 PM, Eric Iverson wrote:
>>>>> Thanks to a significant contribution by Bill Lam we now have much of the J6
>>>>> native J plot facility in J7 JHS!
>>>>>
>>>>> This provides plotting in JHS similar to what was available in J6 without
>>>>> the requirement for gnuplot and without the limitations of Google Charts.
>>>>>
>>>>> The plot output is an html file that draws on the html5 canvas element.
>>>>> This is similar to the new gnuplot facility and uses the same jhsshow,
>>>>> jhslink, and related facilities.
>>>>>
>>>>> There are still rough edges that need work, but I strongly encourage you to
>>>>> take an initial look.
>>>>>
>>>>> Use JAL to update JHS then shutdown and restart JHS server.
>>>>>
>>>>> browse to jijx
>>>>>       load'~addons/ide/jhs/jplotdemos.ijs'
>>>>>       plotdemo
>>>>>
>>>>> One of the  big problems in getting labs to run in JHS was that J6 plot
>>>>> wasn't supported. With this new support it should be much easier to get
>>>>> more of the labs running cleanly on JHS.
>>>>>
>>>>> This plot facility will work on your iPad!
>>>>> ----------------------------------------------------------------------
>>>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>>> ----------------------------------------------------------------------
>>>> For information about J forums see http://www.jsoftware.com/forums.htm
>>>
>> ----------------------------------------------------------------------
>> For information about J forums see http://www.jsoftware.com/forums.htm
>