Zooming In and Out

We now have a number of traces displayed. However, the current trace is small. Suppose that we would like to look a little closer at a peak in the current waveform. We can do this by using some of the zoom features provided by Probe. Select View and then Zoom from the menu bar  

The menu lists 5 ways to zoom in and out. Select Area. The cursor will be replaced by crosshairs  

See page 106 for a more detailed description of how to switch between windows using this method. 

Click and HOLD the LEFT mouse button. While continuing to hold down the mouse button, move the mouse down and to the right. An outline will appear  

The portion of the plot inside the outline will be enlarged to fit the screen. Move the mouse to make an outline as shown above and release the mouse button. The display will zoom in on the area  

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We may also want to use the zoom feature of MATLAB to zoom in and out of a plot to get a better picture of, say, the break-off point of two loci. Make sure you enter "zoom off" when you are done. 

We now have a better view of the schematic page. Note that we can zoom in and out while still placing parts and that the resistor moves with the mouse. Zoom out until you see a screen close to the one shown below ... 

Start the viewer using AliDot. pi alif old. out, and a canvas will open showing the dot plot. The + and keys can be used to zoom in and out. The coordinates of the basepair below the mouse pointer is indicated in the upper left corner. Clicking on any basepair will display more detailed information including the probability of the pair, the number of sequences unable to form the pair, and the observed basepair types. A screenshot is shown in Fig. 2. 

Multiscale regression or wavelet regression [60] is based on the simple idea that the mapping between the independent and dependent variables may involve different resolution levels. Most approaches to multivariate regression and classification only make use of the original data resolution in forming models. The multiscale approach enables the investigator to zoom in and out of the detail structures in the data. 

Mapview has many useful options, which are well described in the oifline help. Some maps have more than one tier, each displaying different types of markers, such as markers positioned with varying confidence thresholds on a linkage or radiation hybrid map. It is possible to zoom in and out, highlight markers across maps, color code different tiers, display markers using different aliases, change the relative position of the displayed maps, and search for specific markers. To retrieve additional information on a marker from any of the maps, double-click on its name to perform a Simple Search (as described above). A separate browser window will then display the GDB entry for the selected marker. 

Axis scales - Deciding on an axis scale which works for the parameter(s) being plotted can be complex. For example, some variables utilise a logarithmic scale. Where time is plotted on the x-axis, there is often the issue of being able (or otherwise) to zoom in and out of that scale. Failure to get this right can make a graph difficult to interpret. 

Zooming in and out on the timeline is one of the most fundamental skills needed to master ACID. Fortunately, zooming is very easy, especially if you have a mouse with a wheel button. 

Mouse Wheel Zoom in and out on a project (also Up and Down Arrow keys)... 

Waveforms can also be used to identify where the beat falls in rhythmic music. The two events in Figure 2.15 display the waveforms of two different media files. The top track has a spoken-word media file. The hottom track contains a drum part and displays clear periodic peaks in the waveform that line up with the beat marks along the top of the timeline. By zooming in and out on the timeline or in another window, you can see more detail in the waveform and make more accurate edits. 

The central area of the map displays the risk values overlaid on a backdrop aerial imagery. Navigation controls allow the user to zoom in and out of the map. At each zoom levels, the risk values are aggregated to a suitable level to ensure that the information presented to the user is neither in too much detail or too little detail. The pre-calculated aggregation also ensures that the volume of data queried by the tool is minimised, which improves tool performance. A screenshot of the tool is shown in Figure 7. 

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