| iTool User's Guide: Common Operations |

## Transformations

Three types of transforms are common to all iTools: Resample, Rotate Data, and Scale Data.

### Resample

The Resample transform resamples the selected data. Resampling operation properties include factors for each dimension of the data, as well as the interpolation method to be used.

Figure 7-4: Resample Dialog

Figure 7-4: Resample Dialog

For example, if the X, Y, or Z value of a visualization needs to be different from the original data value, you can resample the data to adjust the X, Y, or Z value by the specified resample factor. Or, if the default interpolation method produces undesirable artifacts in the visualization of the data, you can resample the data with a different interpolation method.

To resample data:

1. Select one or more objects in the iTool window for resampling.

2. Select Operation Transform Resample.

3. Use the property sheet that appears to specify the resampling factor in each dimension, along with the interpolation method. See Resample Properties for details.

4. Click OK to resample the data, or Cancel to abort the operation.

Note For more information on the iTool's Operations Browser, see Operations Properties.

### Rotate Data

The Rotate Data transform makes it possible to rotate the data within the visualization by a specified number of degrees without affecting the rest of the data space (graphical objects and axes).

To rotate data:

1. Select the visualization.

2. Select Operation Transform Rotate Data. The Rotate Data dialog is displayed.

Figure 7-5: Rotate Data Dialog

Figure 7-5: Rotate Data Dialog

3. Specify the number of degrees to rotate by clicking the up-down control, or by editing the text.

4. Click OK.

### Scale Data

The Scale Data transform makes it possible to scale the data within an object by a specified scale factor.

To scale data:

1. Select one or more objects which contain the data to be scaled.

2. Select Operations Scale Data. The Scale Data dialog appears.

Figure 7-6: Scale Data Dialog

Figure 7-6: Scale Data Dialog

3. Change the scale factor, if necessary, by editing the number in the Scale Factor field, and click OK to scale the selected object(s) or Cancel to close the Scale Data dialog without scaling the object(s).

IDL Online Help (March 01, 2006)