Description
In sale to celebrate version 4.0 !
TouchPlot is a powerful grapher with a long list of features :
- formula editor with custom keyboards along with prettyprint display of the formula being entered. Since version 4.0, an alternative algebraic formula editor is provided, and the learning curve is now much lower.
- symbolic differentiation
- numeric integration with graphical display
- user-defined, easy to manage, libraries of functions
- representative curves of functions with a focus on accuracy and speed, with several modes for inspection (zeros, extrema, intersection and values, definite integration)
- calculation of first terms of iterative sequences, and graphical representation of them
- parametric curves in cartesian and polar coordinates
- (numerical) solutions of ordinary differential equations (first and second order) with vector fields
- user defined constants with sliders to observe how a curve is changed by a parameter, or to adjust initial conditions of a differential equation particular solution...
- logarithmic scales if needed, adjustable separately for horizontal and vertical axis.
- drawing of equations, inequations solutions, contourplots, gradient fields, and 3d-plotting of surfaces with equation z=F(x,y).
See the website for documentation, tutorials and activities, videos.
P.S. : here's a hint for those who don't know : you can get a screenshot of the current view by pressing home+lock buttons.
P.P.S. : if despite the embedded documentation and the tutorials on the website you encounter a difficulty, you can get support through email. The adress is very easy to be found in the website as well as in the embedded documentation. (See About section).
What's New In Version 4.1
Bug fix release
Customer Reviews
Very handy, with a few more changes
I use mathematica / matlab on Mac. I wanted some handy tool to plot on the road, and this looks to be a good candidate.
Plots are pretty nice. The setting of the equation is not quite what I like, but is OK.
I want two features added to make this one much easier for me to use.
One is to save the entire setting, including equations, boundaries, etc, by a name. Later I load the setting by selecting from a list. I often use same functions with small modifications, and, for now, I have to start anew, each time.
Second is, somehow, I want to edit the equations. I wrote a complex formula, examined, and found I missed a sqrt. I don't want to start from a scratch.
The programmer is very responsive and I believe this software will become much more handy, soon.
Seriously impressive
This is a shockingly powerful graphing calculator. When you open it, you can chose to define one or two single variable functions, or a parametric curve in Cartesian or polar coordinates, or a function of two variables, or an ordinary differential equation (first or second order). Once you have a function defined, it can graph it along with its derivative-- which it can calculate algebraically. TouchPlot can also calculate a sequence of values for the function, and solve for roots or intersection points. I got a lot more than I was expecting for my $4.99.
Many of the requested features seem to be here (I didn't have the older version). Several reviewers have complained about the interface, but I had no trouble with it at all. The only awkwardness in the function editor comes from not having a parentheses button, but this really is unnecessary. You simply enter the operations in the proper order. For example, (1+2)*3 would be entered by tapping the multiplication button, then addition, and then the numbers 1, 2, and 3. This doesn't take long to get used to.
There are a few imperfections: first, while the function editor includes all the usual elementary functions, floor and ceiling functions, there are no other special functions, like the factorial function, or any special statistics function. You can't save functions you aren't using, except by turning their graphs off, which prevents you from putting another function in its place. You can zoom in and out on the graph only by pinching, which makes it difficult to keep the axes on the same scale.
However, the graphs look great, and they can be 3D, with contours, or inequalities-- I still can't get over how much TouchPlot can do, and I still haven't explored half of it.
A slick plotting app; worth the money
This is a pretty nice plotting app and will hopefully get even better. The slider bars for manipulating constants are very useful; the UI for this is more straightforward than what you find in many computer graphing packages, though I find the sliders hard to put my fingers on sometimes. The pinch interface for zooming in on functions is especially slick. The equation entry system is a bit of a challenge at first, though it makes equations that are nice to see. Hopefully an equation system similar to Apple's Grapher.app can show up eventually.
As of 8/8/08, here are some features that I hope will show up later:
- More special functions (e.g. gamma function and its log, digammas, beta function, Bessel functions, hypergeometric series, probability distribution functions, etc.)
- A way to get the numerical value of a function at x.
- More plots at once.
- Inequalities.
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$0.99
- Category: Education
- Updated:May 28, 2010
- Current Version:4.1
- 4.1
- 0.7 MB
- Languages:English, French, German
- Seller:Pierre-Henri Jondot
- © 2008 Pierre-Henri Jondot
Requirements:Compatible with iPhone, iPod touch, and iPad. Requires iPhone OS 2.2.1 or later.
