More InformationĬredit: The above 3D grapher is based on Lee Stemkoski's Three.js Examples. If your graph doesn't work: Try using brackets! For example, "tan 2x" won't work. You can also use any combinations of the above, like ln(abs(x-y)). In fact, you can use most of the javascript math functions, including Sign (1 if the sign is positive, −1 if the sign of the function is negative.) For example, try sign(sin(x)).Absolute value: use "abs" like this: abs(x+y).Exponential ( e^x, e^y) and logarithm ( ln(x+y) for natural log and log(x+y) for log base 10).Any of the trigonometric functions: sin(x+y), cos((x-y)/2), tan(x/y), sec(x^2/4), cot(3x) (several of these will go off to infinity and are a challenge to see).Involving powers: (like x^2 + 3y^2 - 5x + 2).You can copy from the examples below if you wish. The grapher will accept any of the following functions (use the notation shown). This applet should work OK on mobile devices. Pan the whole graph left and right using the right mouse button and dragging (or 3-finger swipe on a mobile device) Also make use of the z-Scale slider to see main features of the graphħ. Zoom in and out using the mouse wheel (or 2-finger pinching, if on a mobile device). Contour plots can be based on tabular data or mathematical expressions within the same graph, and the contour plot data can lie on a regular grid or at random (x, y) points. You can vary the z-scale (changing the height of each peak) and the number of segments (which alters the sampling rate) using the sliders below the graph.Ħ. Contour plotting is available in both 2D and 3D graphs. You can vary the x- and y- lower and upper limits using the sliders below the graph.ĥ. The blue lines are lowest and the red ones are highest.Ĥ. In this mode, you are looking at the 3D graph from above and the colored lines represent equal heights (it's just like a contour map in geography). You can enter your own function of x and y using simple math expressions (see below the graph for acceptable syntax).ģ. Choose any of the pre-set 3D graphs using the drop down box at the top.Ģ. You can also toggle between 3D Grapher mode and Contour mode. Vector fields can model velocity, magnetic force, fluid motion, and gradients. You can use the following applet to explore 3D graphs and even create your own, using variables x and y. Quiver, compass, feather, and stream plots. The first example we see below is the graph of z = sin( x) + sin( y). That is, the z-value is found by substituting in both an x-value and a y-value. A graph in 3 dimensions is written in general: z = f( x, y).
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