http://math.exeter.edu/rparris Latest version of PEAnut Software en-us 13 Sep 2012 14:14:14 GMT 13 Sep 2012 14:14:14 GMT Weblog Editor 2.0 rparris@exeter.edu (Rick Parris) rparris@exeter.edu (Rick Parris) http://math.exeter.edu/rparris/winplot.html More developments in mapping windows, based on user feedback. The "active" button can now be used to designate which curves in the domain window are mapped into the range window. In z-plane windows, the "derive" button can be applied to the mappings themselves. Also in z-plane windows, repairs were needed because some parametric equations were not being parsed correctly. I await news of unintended consequences. wpupdate 13092012 13 Sep 2012 14:14:14 GMT http://math.exeter.edu/rparris/winplot.html At the request of a user, it is now possible in mapping windows to obtain Jacobian data at points whose coordinates are entered from the keyboard. wpupdate 09092012 09 Sep 2012 13:52:00 GMT http://math.exeter.edu/rparris/windisc.html Repaired the editing function for the apportionment spreadsheet (for some reason, it was not allowing long names). The Voting-window notebook was forgetting its contents, and this has also been fixed. wdupdate 08092012 08 Sep 2012 18:18:18 GMT http://math.exeter.edu/rparris/wincalc.html At the request of a user, the List menu now has a Batch dialog box, which permits the a single calculation to be applied to comma-separated lists of input values. wcupdate 05092012 05 Sep 2012 12:12:12 GMT http://math.exeter.edu/rparris/winplot.html A very minor change, to make the program regard the closing (or opening) of the Inventory as a reason to enable the menu item "Save". wpupdate 29082012 29 Aug 2012 18:00:00 GMT http://math.exeter.edu/rparris/winwordy.html A Russian version is now available, thanks to Anatoly Koryanov. I also corrected a couple of bugs in the word-find window. wwupdate 220820120 22 Aug 2012 20:20:20 GMT http://math.exeter.edu/rparris/winplot.html There has been a flurry of user feedback recently. The domain grid in Mapping windows can now be polar --- just click the new "Polar" item in the Map menu. This addition requires a new version number. The Settings dialog in Mapping windows also needed repair, since the tangent color and secant color buttons were faulty (targeting gridline colors instead), and the now-retired "gridline" color button had no role to play. In complex Mapping windows, the "Im" function has been repaired (it was not working). The "Swap" button in 2D windows was producing strange behavior when applied to an implicit example that appeared in the shading dialog, or to an explicit function that had a locked domain. Finally, the component functions of an "Intrinsic" curve can now be plotted by opening the miscellaneous DEQ windows. wpupdate 11082012 11 Aug 2012 12:12:12 GMT http://math.exeter.edu/rparris/winstats.html A power user reported that a balanced one-way ANOVA request using a data array that had zero variance led to a crash. Not any more. wsupdate 07082012 7 Aug 2012 12:12:12 GMT http://math.exeter.edu/rparris/winstats.html In the Gambler's Ruin window, it is now clearer how to turn off a ceiling value on the length of a sequence of games. The user can now manage the random-number seed that is used to generate the data. wsupdate 27072012 27 Jul 2012 15:15:15 GMT http://math.exeter.edu/rparris/winplot.html The first oversight has appeared. I had to add a line of code to safely open a file that includes an explicit 3D curve and its indicatrices. Sorry for the inconvenience. wpupdate 26072012 26 Jul 2012 20:00:00 GMT http://math.exeter.edu/rparris/winstats.html Repaired an error in the reporting of tail probabilities in two-way chi-square tables. wsupdate 25072012 25 Jul 2012 12:12:12 GMT http://math.exeter.edu/rparris/winmat.html I was dismayed to discover that 3D rotation matrices were being set up incorrectly (except for the default example!). Sorry for any inconvenience. wmupdate 25072012 25 Jul 2012 11:11:11 GMT http://math.exeter.edu/rparris/winplot.html Repaired the 3D curve-family manager, which was not working reliably. It is now possible to move the 2D Slider along the graphs of indefinite integrals. Spherical indicatrices for 3D curves are now available; just click the "Frenet" button in the Inventory. This was a bit complicated to engineer, so I await reports of unintended consequences. wpupdate 21072012 21 Jul 2012 13:13:13 GMT http://math.exeter.edu/rparris/wingeom.html Another small repair to report: The min and max functions were allowing only two arguments; now they allow several, as in [min](AB,BC,CA). wgupdate 14072012 14 Jul 2012 13:13:13 GMT http://math.exeter.edu/rparris/winstats.html Finished the export project started a couple of days ago (I noticed that I missed a few windows, and forgot to initialize a couple of file names). wsupdate 26062012 26 Jun 2012 15:00:00 GMT http://math.exeter.edu/rparris/winstats.html Repaired a bug in the printing of histogram windows. As has been done recently with other PEAnut programs, modified the graphical export menus (all output is still only single-page, however). wsupdate 24062012 24 Jun 2012 12:12:12 GMT http://math.exeter.edu/rparris/wingeom.html A small repair to report: In 3D windows, spherical segments were not being described correctly in the History. wgupdate 23062012 23 Jun 2012 19:19:19 GMT http://math.exeter.edu/rparris/winplot.html A user reported that some of his old 3D files were not opening properly. Indeed, the code that was supposed to grandfather the parsed-domain feature for 3D parametric curves was not doing its job. It should open those files now. Sorry for any inconvenience. wpupdate 21062012 21 Jun 2012 23:23:23 GMT http://math.exeter.edu/rparris/winfeed.html More developments: Dynamic fractals can now have more than seven targets. As an illustration, a ten-target system named "icosahedral" has been added to the Misc|Examples library. The user is now able to adjust the View before preparing a set of non-zoom slides. I await news of unintended consequences. Indeed, while working on these modifications, I discovered a glitch that was introduced last summer when the constraint on the repetition counter was relaxed. This bug (which was preventing old files from opening properly) has been repaired. wfupdate 13062012 13 Jun 2012 11:11:11 GMT http://math.exeter.edu/rparris/winfeed.html A couple of new developments to report: To a limited extent, multiple-page export of graphics is now available in most windows (this has been done recently to Winplot, Wingeom, and Windisc). When it makes sense to do so, the program will ask the user to specify a parameter to index such output. I am happy to hear about any opportunities I may have missed, or any mistakes that you discover. On the subject of fractals in the classroom, Maria Hernandez sent me a link to a Newton's Method project that she has developed for her calculus students. It includes a short video that shows how Winfeed can play a role in the exploration. wfupdate 04062012 04 Jun 2012 12:12:12 GMT http://math.exeter.edu/rparris/windisc.html Dealt with a few anomalies in multiple-page PiCTeX output. wdupdate 13052012 13 May 2012 17:17:17 GMT http://math.exeter.edu/rparris/windisc.html The multiple-page export of graphics has been extended to all five formats; this applies to displaying algorithms step-by-step in the Graph window. While making this change, I repaired the Scheduling window, which was crashing sporadically. wdupdate 08052012 08 May 2012 11:11:11 GMT http://math.exeter.edu/rparris/wingeom.html Responding to a request that Wingeom offer more assistance in the creation of animations, I have uniformly extended the multiple-page export of graphics to all five formats. When it makes sense to do so, the program will ask the user to choose a parameter to index multiple-page output. One additional modification: the Voronoi window now samples the color palette differently. wgupdate 06052012 06 May 2012 14:14:14 GMT http://math.exeter.edu/rparris/winplot.html Corrected a minor anomaly in the newly designed SVG dialog for exporting graphics. wpupdate 02052012 02 May 2012 17:17:17 GMT http://math.exeter.edu/rparris/winplot.html Dietmar Strube sent me some animated GIFs that he created with Winplot. wpupdate 01052012 01 May 2012 13:13:13 GMT http://math.exeter.edu/rparris/winplot.html Two developments to report. First, responding to a request that Winplot offer more assistance in the creation of animations, I have uniformly extended the multiple-page export of graphics to all five formats. When it makes sense to do so, the program will ask the user to choose a parameter to index multiple-page output. While modifying the program code, I repaired an error (the feature was not working for EPS output). Second, another user pointed out that points added to the ends of 2D polar segments were not being graphed correctly (in polar mode, that is). Now they are. wpupdate 29042012 29 Apr 2012 12:12:12 GMT http://math.exeter.edu/rparris/winplot.html An interesting drawback to a recent "improvement" was pointed out by a user. Last July, displayed equations were given their independence. The equations can be moved around the screen like other supplementary text, and their attributes can now be edited individually. Once the equation texts were made independent, however, it became impossible to edit their attributes in unison (making a uniform change of font size, for example). With this in mind, I have re-installed the dedicated equation font; it is listed in the new Settings dialog box. Check the box next to this item to restore the old display system, which applies the same font to all the equations. wpupdate 13042012 13 Apr 2012 13:13:13 GMT http://math.exeter.edu/rparris/winplot.html At the request of a user, the 3D curve slider now shows all nine components of the Frenet (TNB) frame when that is the only one of the three calculation items to have a check. wpupdate 26032012 26 Mar 2012 15:15:15 GMT http://math.exeter.edu/rparris/winplot.html Implemented an interesting request from a user. When pi symbols are requested to scale the 2D axes, fractions are now displayed vertically, instead of horizontally. If you still prefer the horizontal version, you can switch the vertical mode off; see the online help text for details. While working on this new axis-scale code, I discovered and repaired a couple of errors that were afflicting EPS and SVG output. wpupdate 15032012 15 Mar 2012 12:12:12 GMT http://math.exeter.edu/rparris/winplot.html Eliminated a bug that caused sporadic crashes when retrieved files contained indefinite integrals. A user also reported that "linked" windows (in the Animation menu) were hiding behind the main (green) window when this was large enough (maximized) to cause trouble. This has been repaired, I think. wpupdate 05032012 05 Mar 2012 14:14:14 GMT http://math.exeter.edu/rparris/windisc.html At least for undirected graphs, the program will now seem to search more thoughtfully for Hamiltonian circuits and paths. wdupdate 04032012 04 Mar 2012 13:13:13 GMT http://math.exeter.edu/rparris/winplot.html A few more adjustments and repairs. A user noticed that the box thickness controls in the new 3D Settings dialog box were not having any effect; this has been fixed. The tangent lines created by the 3D Slider were misbehaving in three (related) ways: They were causing crashes when the tracing cursor was assigned to them; they did not remember the placement of requested arrows; the arrow requests themselves caused the lines to re-position themselves. All of these anomalies have been fixed, I think. wpupdate 21022012 21 Feb 2012 12:12:12 GMT http://math.exeter.edu/rparris/winplot.html A user reported that the slider dialog assigned to the "time" parameter (the character "@") was crashing. Indeed it was. It seems that not many users time their animations, since this bug has been around since 17 Jan 2010 (which is when I added integer mode for animation sliders). It should behave properly now. wpupdate 12022012 12 Feb 2012 12:12:12 GMT http://math.exeter.edu/rparris/winplot.html A couple of adjustments to report. Following up on a repair made last December, I taught the program to do a better job of setting up the parameter domain when an unrestricted explicit y=f(x) graph is reflected across a general axis. In response to a crash report from a veteran user, I discovered that the cause was the faulty retrieval of evaluated texts. wpupdate 08022012 08 Feb 2012 14:14:14 GMT http://math.exeter.edu/rparris/winplot.html Many items to report. (1) Prompted by a veteran user, I did something that should have been done long ago --- collecting several menu items (fonts, colors, pen widths, and more) into a "settings" dialog box that is opened from the Misc submenu, and that will stay open, making it easier to manage certain attributes. (2) Because some users did not want to see recent file names populating the File menu, I installed a switch in the main Windows menu, so that you can turn off this feature. (3) While making these changes, I repaired the 3D "linked" animation window, which had somehow gotten broken. (4) Another user noticed that changes to the user-function library were not generating "save?" messages when the window was closed; now they do. (5) In addition, this dialog box now accepts longer definition strings, and text is preserved exactly as it is typed by the user (no automatic conversion to upper case). (6) Yet another user report revealed that graphs of lines ax+by=c in the 2D window were disappearing if they passed exactly through a window corner; this anomaly became conspicuous when the line y=x was graphed in a perfectly square window centered at the origin. That has been repaired. wpupdate 28012012 28 Jan 2012 18:18:18 GMT http://math.exeter.edu/rparris/winstats.html A veteran teacher of statistics recommended that the various test dialog boxes be equipped with "save?" messages for data sets that are created on the spot. These tests are accessed via the Calculation menu of continuous probability windows. Such data can otherwise be lost by inadvertently hiding the matrix window. The message has been installed. While I was at it, I corrected an error that was automatically inserting a lot of extraneous material into the summary text windows; these summaries should only receive data when a test button is clicked. wsupdate 21012012 21 Jan 2012 17:17:17 GMT http://math.exeter.edu/rparris/winstats.html The Russian version is now up to date. wsupdate 10012012 10 Jan 2012 11:11:11 GMT http://math.exeter.edu/rparris/winplot.html While upgrading the 2D implicit-region dialog box last October, I forgot to anticipate that the user might delete a curve that was used to define a region (which inevitably leads to a crash). This has been fixed. wpupdate 03012012 03 Jan 2012 14:14:14 GMT http://math.exeter.edu/rparris/wingeom.html Thanks to a report from a veteran user, I was able to correct the 3D inscribed-sphere function, which was miscalculating badly. It seems to be ok now. Happy New Year! wgupdate 01012012 01 Jan 2012 04:04:04 GMT http://math.exeter.edu/rparris/winplot.html Responding to a pair of user reports, I found and fixed a couple of bugs, which mostly pertained to the 2D translation of graphs. There was also a crash-producing bug in the 2D Italian surface of revolution dialog box. wpupdate 31122011 31 Dec 2011 18:18:18 GMT http://math.exeter.edu/rparris/winplot.html A Polish version is now available, thanks to Piotr Pawlikowski. At the request of a user, a standalone construction for indefinite integration has been added to the function library --- intv(f,a,b,n) is the integral of f with respect to v, from v = a to v = b, where f, a, and b can be arbitrary expressions. The integration variable "v" can be changed to another letter. The optional integer parameter is proportional to the number of subdivisions; its default value is 40. The derivative of the gamma function is now enabled, and the polygamma function psi(n,x) of order n has been added to the function library. Two branches of the Lambert W function have also been added --- lamb(0,x) and lamb(-1,x). wpupdate 30122011 30 Dec 2011 13:13:13 GMT http://math.exeter.edu/rparris/wingeom.html While thinking about a question from a user, I was horrified to discover that 2D regular polygon units were not responding correctly to size changes during animation (the first side was frozen). A repair has been made. wgupdate 22122011 22 Dec 2011 13:13:13 GMT http://math.exeter.edu/rparris/wingeom.html I recently started to add illustrations to my help pages. While working on this project today, I discovered that my 3D macro demo was no longer applying the intended transparency. I also discovered that the "label" switch in the 3D Edit|Linear Elements dialog box had stopped working. A couple of small repairs have been made. wgupdate 13122011 13 Dec 2011 23:23:23 GMT http://math.exeter.edu/rparris/winplot.html At the request of a user, field vectors in 2D and 3D can now be displayed with varying lengths. The feature is activated in the edit dialog by enclosing length information in brackets (see the Equa help text). At the request of another user, optional image axes can be added when transforming a curve. A transformational error introduced in the previous update was also repaired. wpupdate 11122011 11 Dec 2011 12:12:12 GMT http://math.exeter.edu/rparris/winarc.html In response to a user request, a new puzzle has been added to the collection. Its name is "Sieve". The Help file for the window explains what it does. waupdate 08122011 08 Dec 2011 12:12:12 GMT http://math.exeter.edu/rparris/windisc.html Fixed a minor bug that afflicted retrieved Apportionment files; occasionally a crash would result when the user subsequently tried to change the apportionment Method. There is nothing wrong with the files themselves. wdupdate 06122011 06 Dec 2011 23:23:23 GMT http://math.exeter.edu/rparris/winplot.html The 2D parsed domain feature introduced in May 2010 was not being applied to transformed functions (rotated, reflected, translated) or to their derivatives. Now it is. wpupdate 04122011 04 Dec 2011 12:12:12 GMT http://math.exeter.edu/rparris/winstats.html On-line help pages are now available. I made a couple of minor adjustments to the program so that it corresponds better to what the help pages say. Feedback is welcome, of course. wsupdate 01122011 01 Dec 2011 15:15:15 GMT http://math.exeter.edu/rparris/winstats.html Corrected a couple of minor errors, and brought the two Serbian versions up to date. wsupdate 27112011 27 Nov 2011 19:19:19 GMT