KmPlot/Using Sliders

    From KDE UserBase Wiki

    A main feature fo KmPlot is to visualize the influence of parameters to the curve of a function.

    Moving a Sinus Curve

    Let's see, how to move a sinus curve left and right:

    • Create a new cartesian plot.
    • Enter the equation
      f(x,a) = sin(x-a)
    • Check the Slider option and choose Slider No. 1 from the drop down list.
    • To make the available sliders visible, check View -> Show Sliders

    Now you can move the slider and see how the parameter value modifies the position of the curve.

    Screenshots

    Trajectory of a Projectile

    Now let's have a look at the maximum distance of a projectile thrown with different angles. We use a parametric plot depending on an additional parameter which is the angle.

    • Define a contant v_0 for the starting velocity.
    • Create a new parametric plot
    • Enter the equations
      f_x(t,α) = v_0∙cos(α)∙t
      f_y(t,α) = 2+v_0∙sin(α)∙t−5∙t^2
    • Check the Slider option and choose Slider No. 1 from the drop down list.
    • To make the available sliders visible, check View -> Show Sliders

    Now you can move the slider and see how the distance depends on the parameter value.