# KmPlot/Using Sliders

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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.

## 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 angel.

• 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. Educational and training fun for young and old

This page was last edited on 11 October 2010, at 18:08. Content is available under Creative Commons License SA 4.0 unless otherwise noted.