Axis 282 Uživatelský manuál stáhnout pdf (Strana 12)

Chapter II-12 — Graphs

II-244

If you manually scale any axis, that axis changes to the manual scaling mode. The methods of manual

scaling are described in the next section. Axes in manual scaling mode are never automatically scaled.

If you choose Autoscale Axes from the Graph menu all of the axes in the graph are autoscaled and returned

to the autoscaling mode. You can set individual axes to autoscale mode and can control properties of the

autoscale mode using the Axis Range tab of the Modify Axis dialog described in Setting the Range of an

Axis on page II-245.

Manual Scaling

To manually scale one or more axes of a graph with the mouse, start by selecting the region of the graph

that you want to examine. Then select the scaling operation that you want from a pop-up menu that appears

when you click inside the region.

Click the mouse and drag it diagonally to frame the region of interest. Igor displays a dashed outline around

the region. This outline is called a marquee. A marquee has handles and edges that allow you to refine its

size and position.

To refine the size of the marquee move the cursor over one of the handles. The cursor changes to a double

arrow which shows you the direction in which the handle moves the edge of the marquee. To move the

edge click the mouse and drag.

To refine the position of the marquee move the cursor over one of the edges away from the handles. The

cursor changes to a hand. To move the marquee click the mouse and drag.

When you click inside the region of interest Igor

presents a pop-up menu from which you can

choose the scaling operation.

Choose the operation you want and release the

mouse. These operations can be undone and

redone; just press Command-Z (Macintosh) or

Ctrl+Z (Windows).

The expand operation scales all axes so that the

region inside the marquee fills the graph (zoom

in). It sets the scaling mode for all axes to manual.

The horiz expand operation scales only the horizon-

tal axes so that the region inside the marquee fills the graph horizontally. It has no effect on the vertical axes. It

sets the scaling mode for the horizontal axes to manual.

The vert expand operation scales only the vertical axes so that the region inside the marquee fills the graph

vertically. It has no effect on the horizontal axes. It sets the scaling mode for the vertical axes to manual.

The shrink operation scales all axes so that the waves in the graph appear smaller (zoom out). The factor

by which the waves shrink is equal to the ratio of the size of the marquee to the size of the entire graph. For

When you position the

cursor over various

parts of the marquee,

the cursor shape

indicates what clicking

and dragging will do.

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