Getting started with KAlgebra: Difference between revisions

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    Revision as of 15:53, 9 April 2010

    KAlgebra is a calculator with symbolic and analysis features that lets you plot 2D and 3D functions as well as to easily calculate mathematical expressions.

    The Console Tab

    When you first open KAlgebra a blank window shows up, this is the main work area for calculus.

    Let's get started with a little example of how KAlgebra works, just type:

    2+2


    Then type Return and KAlgebra will show you the result. So far it's easy.

    However, KAlgebra is much more powerful than that, it started as a simple calculator, but now it's almost a CAS. You can define variables this way:

    k:=3


    And use them normally:

    k*4


    And that will give you the result: 12 You can also define functions:

    f:=x->x^2


    And then use them:

    f(3)


    Which should return 9. You can define a function with as many variables as you want:

    g:=(x,y)->x*y


    The possibilities of defining functions are endless if you combine this withe the piecewise. Let's define the factor function:

    fact:=n->piecewise { n=0 ? 1, n=1 ? 1, ? n*fact(n-1) }

    Yes! KAlgebra supports recursive functions. Give some values to n, to test it.

    fact(5)


    fact(3)

    KAlgebra has recently started support for symbolic operations, to check it out, just type:

    x+x+x+x


    or

    x*x


    It doesn't work on some complex structures, though. Only basic support so far.

    Moreover, KAlgebra has support for differentiation. An example of the syntax:

    diff(x^2:x)


    If you have used KAlgebra, you will have noticed the syntax completion support, which is very helpful.

    Another resource that can be useful to learn more about KAlgebra comes with KAlgebra: The Dictionary tab

    It contains examples of every function supported by KAlgebra. Maybe the best way to learn how to do things with KAlgebra.