Scatter visualizer
From Piki
The Scatter visualizer plots one variable as a function of a second variable. It is capable of showing two pairs of features simultaneously and features selection and removal of specified data points functionality.
| Scatter | |
 | |
| Name | Scatter |
| Can modify data | Yes |
| Produces filters | Yes |
| Can show multivariate data | Yes |
| Supports selection | Yes |
| Supports clipboard operations | Yes |
| Can export data | No |
| Can export images | Yes |
Contents |
Operation
The visualizer menu has five drop-down selection boxes. The first will let you choose between the training and the validation set. The next two are called X and Y. They are used to specify what two features to plot and X and Y denotes the horizontal and vertical axis respectively. The next two are named U and V. They can be used to plot a second pair of features simultaneously with the X and Y pair. To plot U and V you must first enable Use UV as X2Y2 in the Options menu.
The Options menu offer the following:
- Plot Mode - Line and/or Scatter.
- Use UV as X2Y2 - Toggle the secondary U-V pair mentioned above.
- Make Filter - If you have selected any samples in this visualizer you can choose between removing them, or removing all other samples but them, and apply this removal as a filter on the filter stack of the data unit being displayed by the visualizer.
To see the coordinates of the mouse position, right-click on the plot and choose Show World Coordinates to toggle their display.
Zooming and Panning
To zoom to a specific region, use the magnifying glass tool 
. If you just want to stretch or tighten up one axis you can do so by dragging at the axis just outside the plot area. To pan, use the hand tool 
and to get back to the default scales and positions of the axis, right-click and select Original Dimensions.
Selection
The Value vs. Sample visualizer will let you select samples and will show selected samples in alternated color.
To select samples, use the selection tool. 
. To add to a selection press [Shift] and to subtract from a selection press [Alt]. To select everything or to clear the selection, use the two buttons in the visualizer menu (
). Note that only points in the X-Y set can be selected.
Clipboard, Save and Print
Their is a dedicated menu for these tasks featuring a button for each action. 
The Save button will save the plot as a any of a number of image formats. Print will let you print out an image of the plot and Copy will copy selected data to the Windows clipboard in CSV text format. If the selection is empty, all data will be copied. When data is copied to the clipboard, all features will be copied and not just the ones displayed in the plot.