KmPlot/Utilisation des glissières

Une fonctionnalité principale de KmPlot est de visualiser l'influence des paramètres d'une fonction sur une courbe.

Bouger une courbe de sinus

Regardons comment déplacer une courbe de sinus de gauche à droite :

• 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
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  Input

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  Show sliders option

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  Slider window

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 constant 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.