![]() Wolfram Knowledgebase Curated computable knowledge powering Wolfram|Alpha. Wolfram Universal Deployment System Instant deployment across cloud, desktop, mobile, and more. In the previous plotting post, you had the opportunity to learn about 2D Cartesian plotting in Wolfram|Alpha, and now you are equipped with the ability to make 2D polar and parametric plots as well.Wolfram Data Framework Semantic framework for real-world data. We focus on two functions, DSolve and NDSolve. parametric plot (sin(8 t) (-csc(2 t)), -2 sin(3 t) sin(5 t) csc(2 t)) The solution of differential equations using the software package Mathematica is discussed in this paper.parametric plot (cos( t) – sin^2 t/sqrt(2), cos( t) sin( t)).You can rotate each 3D picture plotted in Mathematica by placing the mouse on the pic-ture and. ![]() The command ParametricPlot3D is used to plot surfaces given by parametric equations, for example x tcost, y tsint, z t. parametric plot (1/cosh( t), t – tanh( t)) The command ContourPlot3D is used to plot surfaces given by an equation, for exam-ple x2 +y2 1, x+y2 z 3, sin(yz) 0.Want some more examples? Check out these classic examples of parametric plots (the tractrix, fish curve, Tschirnhausen cubic, and Plateau curves, respectively): If we had just said “plot” instead of “parametric plot”, then Wolfram|Alpha would have returned a Cartesian plot of 4cos(φ) + 2cos(2φ) and 4sin(φ) + 2sin(2φ), as well as a parametric plot of the deltoid. Use WolframAlpha to generate plots of functions, equations and inequalities in one, two and three dimensions. How about the parametric plot of the astroid: Now let’s look at some other cool plots that Wolfram|Alpha can create. Of course, it’s possible to specify a range for the parameter, in this case we plot ( x( t), y( t)) = (sin( t), sin(3 t)) for t from 0 to 100. In the above example, we didn’t even need to enter a plot range Wolfram|Alpha picked the plot range that best suits the graph. We can easily see that this is the same as the Cartesian equation y = 1 – 2 x + x 2. Try to make a parametric plot of ( x( t), y( t)) = (1- t, t 2). Here are some examples of 2D parametric plots to try in Wolfram|Alpha. What is the difference between a polar and parametric plot? Parametric coordinates specify points ( x, y) in 2D with two functions, ( x, y) = ( f( t), g( t)) for a parameter t. Now that you have seen some great examples of polar plots, let’s move on to parametric plots. Wolfram|Alpha can also handle more complicated inputs, like r(θ) = exp(cos(θ) – 2 cos(4θ) + sin (θ/12)^5: By clicking the dog-ear in the bottom left of the images and then “Copyable plaintext”, you can see the Mathematica code used to generate the plots. Want to know how to graph this in Mathematica? We can easily extract the Mathematica code for this plot right from Wolfram|Alpha. ![]() Or we can get a little fancier and plot a polar rose with eight petals. Making a polar plot in Wolfram|Alpha is very easy for example, we can plot Archimedes’ spiral. To generate a polar plot, we need to specify a function that, given an angle θ, returns a radius r that is a function r(θ). The following diagram illustrates the relationship between Cartesian and polar plots. For example, the Cartesian point ( x, y) = (1, 1) has the polar coordinates ( r, θ) = (√2,π/4). In this post, we will look at 2D polar and parametric plotting.įor those of you unfamiliar with polar plots, a point on a plane in polar coordinates is located by determining an angle θ and a radius r. ![]() In my last blog post on plotting functionality in Wolfram|Alpha, we looked at 2D and 3D Cartesian plotting.
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