• Supports up to 20 curves on a single graph.

• Curve colors are defined by a color table skin, the hundreds of other graphical options are defined by the primary skin.

• Axes are set to autoscale, however they can also be set to fixed values or the autoscale parameters can be adjusted by altering the skin for this graph.

• Touching a data point shows the values of that data while touching the curve (interpolated line segment) shows the interpolated value at the touch point.

• All the pictures shown here are in landscape format, but if you rotate the device then it shows portrait format just as you expect.

• Log scales are automatic and there are many adjustments that can be made to the autoscale by using a skin or you can turn autoscale off.

• No need to reenter the data, rather simply select the representation of the data you want.

• Touch works on non-linear graphs as well.

• Notice the sub-cycle log scale on the y-axis and the full-cycle scale on the x-axis as computed by the autoscaler.

• Touch on the Linear, Semi-Log, X-Log, Log-Log, Polar, R-Log Polar entries for line, area or scatter plots to show the same data in different coordinates.

• The graph's titles can be set in the Graph Preference task entry or on the skin.

• Font size, type and other attributes can be set in the skin.

• Touch any part of the curve to see the curve's x and y values, or in the case of a polar plot, the curve's theta and radius values.

• The radius-axis labels are rotated 90 degrees. With a skin, you can set the rotation to any value simply by dragging a dial.

• Many of the graphs share the same data and simply present that data on a different coordinate system or with different graphical effects. In this case and area graph is simply a different graphical representation of a line graph.

• The stacked effect gives a sense of accumulated data.

• If needed, the autoscale feature can be set so that data presents to the graph frame and there is no gap. However, usually ticks are defined on some regular interval such as shown here so that the data does not fill the entire graph.

• Scalar data can be represented by column, bar and pie graphs.

• Grids are on by default, however you may want to turn them off with a skin.

• Gradients can be set via a skin as well. Gradients are particularly handsome for bar and column graphs.

• The y-axis labels are defined by user input.

• Double touch to zoom in on the graph. The picture shows the graph zoomed into the lower left corner.

• Almost all graphs respond to touches.

• Most other graphics can also have gradients by loading in the corresponding skin set to have gradients.

• The wedge border and other attributes are also defined by skins that you can make.

• Touch the line fit to see interpolated values, or a data point to see the values at that point.

• Choose different task entries to see dots or labels at the data point.

• The background of the graph has a blue gradient effect and you can change that yourself using the appropriate skin.

• Maps are geographic, schematic, process maps, node graphs, floor plans or any diagram.

• Make your own map and load it into the Map task by following the directions.

• When you touch on a map it shows the name that you defined for that part of the map, such as "Valve 1". If you choose to develop your own application then you can set the touch as a feedback command. For example: Touching Valve 1 opens and closes it.

• The map of the United States is included with Vvidget Builder. You can use that as a starting point for your own map skin. For example, you can define state sets as sales territories and touch to see sales data.

• With a little programming the touch can retrieve enterprise sales data based on geography and present it to the user. For example: Who is the sales rep. in Pennsylvania and what is his phone number?

• All data can be stored on the device so users have access to it at all times and without delay.

• Although associated with Z-Values, a point fill plot can show any 2D density representation.

• Entries are available for all the graph coordinates, i.e.: Linear, Semi-Log, X-Log, Log-Log, Polar and R-Log Polar.

• Simply touch different Task Entries to see the point fill plot on different coordinate representations.

• If you develop using the Vvidget library then touches can be intercepted to perform nearly any task upon a touch. See the Event Qualifier sections in the Vvidget Code Reference Manual.

• The surface chart is defined by scalars on a regular grid, same as for the point fill plot. Both are different representations of the same data and are hence associated with the same Task.

• Color mappings are defined in the skin.

• Touch drag rotates the graph.

• A combination of rotate and zoom helps to bring forward and separate the data point to touch.

• A combination of touch, graphical effects and programming can permit intricate exploration and querying of 3D data.

• A volume graph is a representation of density values on a 3D regular grid shown by color coded cubes.

• The color v.s. density mapping is defined through a skin.

• Touching a density values shows cell values and density values.

• The volume density values can be panned through z-slices by touch-drag horizontally or by animation.

• You can make as many projects as you wish.

• Projects help organize tasks along project boundaries so you can work on one project without affecting another.

• There are 3 ways to acquire data, using a tabular entry (Show Data), using a normal text view to copy, paste and key in data with the keypad (Edit Data) and fetching data from a URL which can reference a web server or shared file entry (Fetch Data).

• Touching a task textual entry navigates to that entry's input mechanism.

• Enter a URL and then touch the Fetch Data button.

• Data is retrieved from the URL. The URL can point to something as simple as a flat file, or can point to a web server CGI service which can, for example, access a database.

• Once the data is fetched then it resides on the device and does not have to be retrieved again. However, you can also setup fetch during first viewing or animation to reacquire data without clicking the Fetch Data button.

Most people desire results without programming. The Graph application is based on one principle: "You give it data and it gives you a graph". That is straightforward and the way it should be. It also employes skins which adds more features but with an increased level of indirection and complexity. If you don't mind the default visuals of the Graph application then you need not be concerned with skins.

There are also people and companies that prefer more automation and specific features for their own operations. But, they also do not desire a huge investment in data visualization programming. For that situation the Vvidget library may meet those needs. For additional information email info@vvi.com.

• The Graph application does not require any programming and can be used right away. Skins are made with Vvidget Builder, an optional Mac OS X application, and although it is a complex application it also requires no programming to access all its features.

• The Vvidget library, documented at Vvidget Code Reference Manual is based on about a million lines of code, or so, but that isn't really of any concern since it comes as a prepackaged library that can be inserted into applications, such as this Graph application, without any programming at all.

• This Graph application is about 30,000 lines of code, a million characters and 100 classes in scope. That is a lot of typing by itself but is still small because it leverages against the much larger project of the libraries.

• If you do choose to program a data visualization application then your use of Vvidget may be as little as a handful of code, perhaps a few dozen lines.

• If you do not want to program at all then this Graph application is for you. No programming, just results based on data inserted.

• If you seek greater features then there are options available from VVI, the leading expert in the field of data visualization on iPhone, iPad and iPod touch as well as Mac OS X.