hi MathsIsFun,

Looks like you've made excellent progress; thank you!

For me the behaviour was a little different. (IE8)

As I zoomed in there was a slight left drift of the numbers, so that, although I had started centred on zero, I became centred on 3.4, then 3.45 and so on.

Just tried it again.  Aaarrhh, the light dawns.  It depends where I'm pointing on the number line;  it zooms out from that point.  That's good.  Better than in my dream.  But maybe it needs an instruction for dumb-brains like me who take ages to work it out. 

After 3.450 I had no more resolution to see further digits, although the power of ten count must still have been working .... if I zoomed out, say, another 5 powers of ten, to zoom back took 5 zoom levels again before I was back to where I'd been.  This is obviously always going to be a problem as there'll always be a point beyond which you cannot go.

..... Unless, and I'm not sure about this, only every other number is displayed to free up space; then every fifth number .......  Not sure if that would be a solution.  Even then a limit point would be reached where the displayed numbers were off the screen and all that would be left would be the line.

So maybe just come up with a "You've reached the limit" notice and then stop zooming.  Either way, I don't think it helps with understanding if the digits all start to look like the same number.  So perhaps stick at say 6 character width numbers and lock the zoom after that.  (But still track left and right with the arrows.)

I can picture learners just liking to operate the zoom and being fascinated by the result.  Not realising that they are seeing and learning about the number system in action.  Great!

   

Bob

ps.  Shed in bits and moved.  Now all I've got to do is put it back together again!!

Hi MIF;

It would be nice to see more digits, then we could have more discussions about .9999999... = 1.

Good thoughts, maybe by taking the log of the scale I can determine the appropriate number of digits and the space they take up. Will work on it.

To get to 0.9999... might be a problem as we run into computer accuracy problems (you know, when 0.345 shows as 0.3449999997) so I may need to have a limit there.


ps. pics of shed before, during (deconstructed), and after would be good!

But bobbym;  I liked the idea.  Now let me see ... I should check with you first.

Woooaah.  But before doing that, I should check with you first.

But before doing that I should check with you first.

But .....................................................

ERROR!  INFINITY LOOP ENCOUNTERED!  MAJOR OVERLOAD.  ALL FUNCTIONS RESET!

  Arrrhhhh.  That's better.

Pics of shed before not available due to lack of time machine.  Anyone got one I could borrow?  If you have, send it to me last week, please.

Other pics possible without time machine.  Just one snag.  It's still too dark now.  Will return to this during the hours of daylight.



Bob

Cool! Nice looking garden, too.

hi MIF,

Well thanks for keeping going.  I have every confidence.

Shed update.  Had to get the roof on before it rained so Monday was hectic and I was on the roof fixing in wooden slats to hold the felt until it was too dark to see the nails any more.  Tuesday, spent the day at my Mother's sorting out her garden.  Today finished the slats but rain stopped play.  So no final picture yet.  Hopefully tomorrow.

Off to see Dave Gorman tomorrow evening. Wow, life is very busy when you're retired!

Really stuck on Juan's integral.  I think it's directly integrable for the right choice of 'u' and 'v' in a quotient.  But my paper attempts are full of near misses.  About to start Version 5.

Bob

Update: New version. Still a little buggy, but improved: Zoomable Number Line

What do you think? Best to speak up now!

For a reason, I cannot un-zoom it.

bob bundy wrote:

Hold the shift key.

Bob

Now that works.

Nice. Shiny. Looks like garden shed, but inside it is a fully-fledged state-of-the-art game theater.

Thank you ... still working on improvements (when time permits)

Update of Zoomable Number Line

Can be zoomed up to about 30 digits now, hopefully that is enough

Try "Fullscreen"

Let me know what you think, and any bugs.