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#desmos — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #desmos, aggregated by home.social.

  1. #desmos is out of control. Here is my guide to all of the features I've found so far. You can make logic gates in there. You can do lists and iterate things:

    desmos.com/calculator/4xeklx0h

    They've added summation and it's a little strange sometimes how it works. This threw me. You set i to be a list and it give you three answers. It won't evaluate it if you don't set an upper bound.

    I'm excited but also a little horrified that this is the new SAT calculator. It's just so feature-rich.

  2. Fun! Well-known online #math #visualization utility #desmos doesn't have a way to save gifs, but someone created one

    jpanneton.dev/gifsmos-v/

    Which let's me share this animation of a #satellite #orbit thing I'm trying to figure out

    wait a minute...#mastodon doesn't support #svg??

    and neither #imagemagick nor #ffmpeg support converting animations directly???

    Ugh, I don't want to fight this battle today.

  3. I may have let things get a liiiiiiiiiittle out of hand when trying to handle the edge cases of this percentile function in #desmos.

  4. Never though noise was so overrated, we really just need a few sin waves...

  5. Waah 3D is such an incredible tool...

  6. Looking for a libre alternative to Desmos online graphing calculator? (desmos.com/calculator)

    I found grapk.tk!

    It used to be on graph.tk, but that address no longer works - yet the name of the project remains.

    So it's now here:
    graph.equation.io/

    Source on Github:
    github.com/aantthony/graph.tk

    #maths #math #graphs #gnuplot #calculator #graphingCalculator #equation #Desmos #alternative #foss #opensource #libre #freesoftware

  7. I don't know who needs to hear that, but if you need to call atan(x) with x in [-1,1], a linear remapping (straight line) to [-π/4,-π/4] is an okayish approx.

    I checked the hermite (smoothstep), and it's also kinda acceptable, just the other way around.

    Then I thought "their average could be interesting"... And it's indeed actually pretty good!

    Is this useful? Probably not.

    Simplifying the expressions, you get:
    atanlol(x) = mix(-π/4,π/4,(x+1)/4+smoothstep(-1,1,x)/2)

  8. I gave an excellent #math lesson this week that details the relationship between exponential growth and #economics and #power structures.

    The basic idea can be summed up with some #desmos graphs:

    The income of a working person who starts at $40000 a year and gets regular yearly raises of $1000 can be shown on the red line.

    The income from a million-dollar investment at 4% per year compounded annually is given on the blue line. They both appear linear and similar. #teachingmath #algebra