Axis 282 Uživatelský manuál stáhnout pdf (Strana 36)

Chapter II-12 — Graphs

II-268

the rest of the graph. You can set the default font for all graphs using the Default Font item in the Misc menu.

You can set the default font for this particular graph using the Modify Graph item in the Graph menu. The

axis label font can be controlled by escape codes within the axis label text. See Axis Labels on page II-282.

Auto/Man Ticks Tab

The items in the Auto/Man Ticks tab control the placement of tick marks along the axis. You can choose one

of three methods for controlling tick mark placement from the pop-up menu at the top of the tab. Choose

Auto Ticks to compute nice tick mark intervals using some hints from you; choose Computed Manual Ticks

to have complete control over the origin and interval for placing tick marks; use User Ticks from Waves to

choose waves that give you complete control over tick mark placement and labelling.

Here is what the tab looks like with Auto Ticks chosen:

With Auto Ticks chosen, you can specify a suggested number of major ticks for the selected axis by entering that

number in the Approximately parameter box. The actual number of ticks on the axis may vary from the sug-

gested number because Igor juggles several factors, including the approximate ticks parameter, to get round

number tick labels with reasonable spacing in a common numeric sequence (e.g., 1, 2, 5). In most cases, this auto-

matically produces a correct and attractive graph. This item is not available if the selected axis is a log axis.

You can turn minor ticks on or off for the selected axis using the Minor Ticks checkbox.

The Minimum Sep setting controls the display of minor ticks if minor ticks are enabled. If the distance between

minor ticks would be less than the specified minimum tick separation (measured in points) then Igor picks a

less dense ticking scheme. For log axes Minor Ticks and Tick Separation affect the drawing of subminor ticks.

The Manual Ticks section on page 275 describes how you can completely override Igor’s intelligent algo-

rithms for tick placement.

Choose a tick

placement mode

from the menu.

These sections are unavailable because Auto Ticks is chosen in the menu.

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Axis 282 Uživatelský manuál Strana 36