ULXLOG/ULYLOG

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DCL:GRPH2:ULPACK : Logarithmic Coordinate Axis Routines: Explanation of Subroutines

4.3.1 ULXLOG/ULYLOG

1.

Function

Plots a logarithmic coordinate axis.

2.

Call

CALL ULXLOG(CSIDE,NLBL,NTICKS)
CALL ULYLOG(CSIDE,NLBL,NTICKS)

3.

Explanation of Parameters

CSIDE (C*1) Specifies the position to plot the axis. (See Section 3.2.)

NLBL (I) The number of labels in the range for a single order. Specify a number from 1 to 4.

1: Labels placed only on the 10ⁿ mark.

2: Labels placed the 10ⁿ and 2. 10ⁿ marks.

3: Labels placed on the 10ⁿ, 2. 10ⁿ, and 5. 10ⁿ marks.

4: Labels placed on marks specified by user.

NTICKS (I) The number of tick marks in the range of one order. Specify within the range of 1≤NTICKS≤9. When a value smaller than 1 is specified, the ticks with smaller tick intervals are omitted first.

4.

Notes

(a): ULXLOG/ULYLOG plots axes using UXPAXS/UYPAXS (ISLCT=2). The minor ticks other than 10ⁿ are drawn using UXPTMK/UYPTMK (ISLCT=1); Major ticks for 10ⁿ are drawn using UXPTMK/UYPTMK (ISLCT=2); Labels are drawn using UXPLBL/UYPLBL (ISLCT=1). Therefore, the attributes of these component elements of the coordinate axes can be inquired/changed using UZpGET/UZpSET. See Chapter 3 for details.
(b): This routine generates the position of the minor ticks internally, and makes a call to UXPTMK/UYPTMK. The restrictions from this work array limit the maximum number of ticks that can be placed to 200.
(c): This routine generates the position of the labels internally, and makes a call to UXPLBL/UYPLBL. The restrictions from this work array limit the maximum number of labels to 50.
(d): When specifying 4 for NLBL the position of the labels must be pre-specified using ULSXBL/ULSYBL.
(e): The label format is specified using the internal variables 'IXTYPE', 'IYTYPE'(formats for X and Y axes, respectively) handled by ULpGET/ULpSET. (The initial values are both 1; all labels have exponent parts.)

`CSIDE`	`(C*1)`	Specifies the position to plot the axis. (See Section 3.2.)
`NLBL`	`(I)`	The number of labels in the range for a single order. Specify a number from 1 to 4.
		1: Labels placed only on the 10ⁿ mark.
		2: Labels placed the 10ⁿ and 2. 10ⁿ marks.
		3: Labels placed on the 10ⁿ, 2. 10ⁿ, and 5. 10ⁿ marks.
		4: Labels placed on marks specified by user.
`NTICKS`	`(I)`	The number of tick marks in the range of one order. Specify within the range of 1`≤NTICKS≤`9. When a value smaller than 1 is specified, the ticks with smaller tick intervals are omitted first.