How do you get flash to draw arbitrary curves from the built in AS graph functions?

]]>Graphs are a big help in the understanding of math.

Yes, well said, especially in determining the number of zeroes that a polynomial has and where they are. Other types of functions even more so! With the new graphing calculators and CAS they are fun to do also. When I started they only gave us a beach full of sand to draw on and some pebbles to count with. Some of us were eaten by sharks, math was more dangerous then.

]]>The Function Grapher and Calculator is ready for you guys to try out. There are probably still bugs, and I don't mind if you tell me about them.

My idea is that we can use this thing to solve or illustrate problems, so I placed a special "Link" section - you can copy-and-paste the "forum" link into your message, and it will re-create the graph you made Have a try and tell me what you think.

I think you have a winner. Graphs are a big help in the understanding of math.

]]>http://www.mathsisfun.com/data/graph.html

(This one has a black background, and no "y=")

(I guess there are 3+ equation graphers!)]]>

http://www.mathsisfun.com/data/grapher-equation.html

]]>http://www.mathsisfun.com/data/function-grapher.php

That one says "y =" to the left of the entry box.

http://www.mathsisfun.com/data/function-grapher.php

This one does not say "y=" to the left of the entry box.

Since the older one doesn't say "y=" to the left of the

expression you enter, it might be a tiny bit confusing.

Just a thought.

The 'a' slider is a bit laggy, but it works perfectly.

Yeah ... it needs time to draw the graph. I thought of part-drawing the graph, or drawing it in low-res (every 4th pixel) while you are dragging - I am not sure it would be better though ?

mathsyperson wrote:

One thing - the plots people have been posting don't seem to work anymore.

Oops ... fixed.

mathsyperson wrote:

I'd also really like boxes where you can specify the shown range exactly (eg. (-pi,-1) to (pi,1) )

Good idea

]]>The 'a' slider is a bit laggy, but it works perfectly.

I'm not sure if it's new, but I also really like the polar feature.

One thing - the plots people have been posting don't seem to work anymore.

Edit: I'd also really like boxes where you can specify the shown range exactly (eg. (-pi,-1) to (pi,1) )

]]>I have an "Equal Scales" option (so when you zoom it can keep scales the same, or let the graph "stretch" if the option is Off).

AND I have a slider for the constant "a" so you can include "a" in your function and then use the slider to alter "a"

Does it work nicely for you guys?

]]>if you zoom out so 10000 units is about one inch, and

then pan upward a few screens, then the left or right

side a the parabola might appear without the other side.

Here is a picture of some trig...

If you pan around by 2 or 3 pixels at a time by clicking

near the middle, then the lines will appear for some

clicks, and then disappear for a few clicks, and if you

pan back, it is always the same locations that trigger

this when you find the problem, so it isn't intermittant I guess.]]>

Glad the bug is rare

Screenshots would be nice

It is really great the way you can pan around.

I was examining what happens when you add two sine waves together with similar frequencies,

and comparing this to the 2sin(average)cos(halfDifference) formula, which I see how it

works on paper by the way with a drawing, but anyway, after about an hour with the

awesome grapher you made, I came across some instances when occasional lines

are not printed on the screen. I made some screen prints, in case you are interested.

It is a pretty rare occurrence and when I pan around by a few pixels, then the missing

lines show up on the screen. But overall, the grapher is beautiful and very, very nice.

Just thought I'd let you know. I took some screen shots if you ever want to see the missing lines.]]>

Some people have been referring to this in Help Me topics, so I thought this topic should be revisited.

As ganesh said earlier, letting the axes have different scales would be extremely useful.

Also, in asymptotic graphs that go to -infinity from one side of a certain x-value and +infinity from the other, the grapher tries to join them with a vertical line.

I'm not sure how easy that would be to fix though.