r/geogebra

how to using current view center location when change the ratio of xAxis:yAxis

Hi, there
I'm using Geogebra classic 5,
I draw some big number point in Geogebra ,
then change the ratio of xAxis:yAxis, the software change the ratio in the center of (0,0), my current view was in big number, will move out a lot,
Is there an option to use the current view's center coordinates as the anchor point when adjusting the X and Y axis ratio?

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u/Tall-Cod4941 — 6 days ago

Can I no longer set the bounds for my axes?

Am I going insane, or has GeoGebra actually removed the ability to set axis bounds in the 3D calculator? Under the settings menu, I should be able to find the following, which is still available in the desktop version:

https://preview.redd.it/yuxg0g35y6jh1.jpg?width=413&format=pjpg&auto=webp&s=5de21fbcd67a00f00ba11c5b0c35409742f22d8f

I've already spent more time than it deserves trying (unsuccessfully) to find this option in the menu largely because it seems unfathomable that GeoGebra would remove such a basic and essential feature. And while I can at least fall back on the desktop app, I'm now concerned that a future update will leave it in a similarly compromised state.

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u/DrCecilCorndog — 7 days ago

algebra output of ellipse(focus1,focus2,point) and hyperbola(focus1,focus2,point)

Hi everybody, when there is a distance of irrational length involved, the coefficients in the corresponding equations shown in the algebra window are too large by a factor of 16. For example, ELLI1=ellipse((-4,0),(4,0),(0,3)) correctly yields 9*x^2 + 25*y^2 = 225, but ELLI2=ellipse((-4,0),(4,0),(6,4)) yields 673.33*x^2 + 929.33 * y^2 = 39109.21 . The command SemiMajorAxisLength(ELLI2) yields 7.62, the square of which is 58.08. 929.33/58.08 = 16.00... the equation is correct, of course, but the coefficients cannot be interpreted as squared semi-axes. Same effect occurs for command hyperbola, and moreover, for a vertically open hyperbola, in order to obtained the canonical form, a factor of -1 has to be applied to the equation. GeoGebra Classic 5.4.927.1-d

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u/StroehleinsSchorsch — 11 days ago

How to make If(0<x<10,x^(2)+y^(2)=z^(2)) work?

I am trying to 'cut' an infinite double cone into a finite single cone by restricting the domain, but GeoGebra doesn't like me putting the equation of a cone as the 'then' condition: is there a way to do this without incurring in this error? I could use the cone function, but I wanted to build something in pure mathematics :)

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u/Excellent_Ninja_2774 — 10 days ago

Angles 0 to 180

Is there an option to set the default to angles between 0 and 180 or is the only way to change it for each individual angle after it is created?

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u/lake327 — 10 days ago

Vectors as function parameters?

Hi,

I'm trying to do a simple line intersection experiment in Geogebra, but I'm struggling with functions which take vectors.

Even when I'm trying something extremely basic, like this function to get the x component of a vector:

f(V) = x(V)

I get the following error:

Illegal argument
x(V)

How can I take vectors as function parameters? I don't feel like I'm trying to do something remotely complicated here, I must be missing something.

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u/mort96 — 13 days ago

Slider issue

I used Android mobile app geogebra suite .I can't change the slider intervals .it is 0.1 always .I can't change it on my own. Please fix this issue and tell me alternate method to solve this problem.

I have one solution for the case whenever slider with interval is required.

Use this f(x) = gif(x) = ⌊x⌋ .If required slider is a' and a is the slider provided by geogebra .

a'= b• ⌊a⌋+ c .

b=required interval

c= start value of slider

u/Own_Swordfish4122 — 11 days ago

stopping animation when y-value reaches a certain value?

i am trying to code a simple simulation of a projectile and its range + distance. i want it to stop when it reaches y=0 so it doesn't go into negative height, but i'm not sure how to do that. do i use a boolean? i didn't see a "StopAnimation" command so is there no way to stop it? here's my code for reference: https://www.geogebra.org/m/nzkraswz

u/ContextAdept9818 — 13 days ago