In my case instead of using mean and std. dev., I am using median and rank statistics for outliers like inter-quartile range. Could be an interesting follow-up exploration / nice segue into robust statistics.

]]>Hello Saf, probably the best thing you can do is download the ggb files and try to deconstruct them. Having said that, I just tried to do that myself, because it’s a year since I made these and I’ve largely forgotten how I managed it. Most of the interesting stuff is in the spreadsheet module – have a look in there. To get the iteration results to display on the screen, well that was a real challenge: All the text lines’ positions are dependent on the position of a single hidden point, the position of which is determined by formulas in terms of zoomX, zoomY, posX and posY. Additionally, the gap between each text line is dependent on zoomY and the gap between the two columns of text is dependent on zoomX. Bloody complicated! It would be useful if you could specify an object’s position relative to the window, rather than the axes – that would make such things a lot easier.

My school uses Autograph, which I very much dislike, so I made these which are far easier to interact with. I give the students a link to the applets on GeoGebraTube and they play around with them to get a feel for each numerical method. It’s way too complicated for them to try to build themselves. They use Excel to do the requisite mathematics for the coursework, and they are allowed to put screenshots of these applets in their submission.

Change of sign is dead easy – just use Excel.

Best wishes

Micky

Any chance you can send me some info on how you made this and the other ggb for MEI cw?

Saf ]]>

Also, for the C3 CW, do you just give them this applet and ask them to enter the equation they are working with or get them to make it from scratch?

]]>Hi Michael, glad you like the applet! I originally had n-max set to 100, but it makes the applet too slow. It’s bad enough set at 50 in HTML5 mode. If you like, download the file and you can modify n-max from within the GeoGebra application.

]]>Thank you ]]>