1Chart::Manual::PropertiUesse(r3)Contributed Perl DocumenCthaatrito:n:Manual::Properties(3)
2
6 Chart::Manual::Properties - complete guide to Chart's changeable
7 properties
8
10 Individual properties of a chart can be changed via method "set":
11 $chart_object->set( %properties);
13 $chart_object->set( key => 'value', ... );
14 This page documents all viable keys and values for this calls.
16 The first section lists the most common data types and their acceptable
18 values.
19 Please note that all chart type reacts only to a distinct subset of
21 properties. The section section therefore groups all properties by
22 chart type or set of types, where they have an effect. The descriptions
23 in this section are shortened to achive a tabular overview.
24 A fuller description of each property provides the third section, where
26 they are alpabetically sorted.
27 The general layout of a chart image:
29
31 Every key expects values of a certain data type. The more often
32 occurring types are sorted, enumerated and decibed in this section.
33 boolean
35 Yes or no decisions you can answer with the perlish 0 or 1 as well as
36 with 'true' or 'false', which might be shortened to 't' and 'T' or 'f'
37 and 'F'. 'none' as an alias of 'false' is also an option.
38 code
40 Anonymous subroutine that usually takes the first argument and returns
41 a transformed result:
42 sub { $_[0] + 1 }
44 color
46 The usual options are:
47 names: 'blue'
49 All names are tabulated visually and by name under "NAMES" in
51 Chart::Color::Constant. You can also define a color with integer
52 values in the RGB or HSL space. Acceptable ranges are for RGB: 3x
53 0..255 and for HSL: 0..359, 2 x 0..100.
54 RGB triplets: [0,255,255]
56 RGB hashes: { Red => 0, Green => 255, Blue => 255 }
57 RGB hashes: { R => 0, G => 255, B => 255 }
58 HSL hashes: { H => 240, S => 100, L => 50 }
59 HSL hashes: { hue => 240, saturation => 100, lightness => 50 }
60 Detailed explanation and even more options you find under Chart::Color.
62 font
64 There are a handful GD built in font object, than can be referenced:
65 GD::Font->Tiny
67 GD::Font->Small
68 GD::Font->MediumBold
69 GD::Font->Large
70 GD::Font->Giant
71 integer
73 Whole numbers (without decimals) to set position, size and alike.
74 positive integer
76 Integers greater or equal zero.
77 string
79 Short texts for title, sub_title and labels on axis, tics and legend.
80 Line breaks ("/n") are only acceptable inside single quotes and in the
81 "title".
82
84 Summary of all properties, grouped by chart type where there
85 applicable. Sections are named after the Chart type in question,
86 except All and NoPie.
87 The format is: name, type, description, default value Click on name for
89 a longer explanation.
90 All
92 Properties available in all chart types:
93 colors-background ... "color" of whole image background ; 'white'
95 colors-datasetx ..... "color" of points/lines/bars of dataset number x
97 = 0..64
98 colors-grid_lines ... "color" of vertical and horizontal grid lines in
100 the plot background; 'black'
101 colors-x_grid_lines . "color" of vertical grid lines; 'black'
103 colors-y_grid_lines . "color" of horizontal grid lines; 'black'
105 colors-text ......... "color" of all text ; 'black'
107 colors-title ........ "color" of text above the graph ; 'black'
109 colors-x_label ...... "color" of x-axis label text; 'black'
111 colors-y_label ...... "color" of y-axis (left side) label text; 'black'
113 colors-y_label2 .... "color" of y-axis (right side) label text; 'black'
115 colors-misc ....... "color" of boxes, ticks, axis and alike; 'black'
117 "f_x_tick" ................ "code" that transforms "would have" into
119 actual tick label on left x-axis; "undef"
120 "f_y_tick" ............... "code" that transforms "would have" into
122 actual tick label on right y-axis; "undef"
123 "graph_border" .......... space between graph and title + legend in
125 pixel; 10
126 "grey_background" ...... bool: sets plot background to grey; 'true'
128 "imagemap" ............ bool: enable imagemap_dump(); 'false'
130 "label_font" .......... "font" of axis labels; GD::Font->MediumBold
132 "legend" .............. qw[left right top bottom none]: placement of
134 the legend; 'right'
135 "legend_font" ......... "font" of the text in the legend;
137 GD::Font->Small.
138 "legend_labels" ....... (array ref): labels of colors in legend;
140 "undef"
141 "png_border" .......... pos_int: space between graph parts and image
143 edge in pixel; 10
144 "sub_title" ........... "string": text below the "title" in smaller
146 letters; ''
147 "text_space" .......... pos_int: extra space around any text; 2
149 "title" ............... "string": text on top of a chart; ''
151 "title_font" .......... "font" of the title text; GD::Font->Large
153 "transparent" ......... bool: full image background transparency;
155 'false'
156 "x_label" ............. "string": x-axis label text; ''
158 "y_label" ............. "string":label on the standard, left y-axis; ''
160 "y_label2" ............ "string":label on right y-axis, if different;
162 ''
163 NoPie
165 Properties available in all chart types of kinda xy-plot, not "Pie":
166 "custom_x_ticks" ..... (array ref): [0,3,4] displays 0th, 3rd, and 4th
168 x-tick; "undef"
169 "grid_lines" ......... bool: draw vertical and horizontal grid lines;
171 'false'
172 "include_zero" ....... bool: forces y-axis to include zero; 'false'
174 "integer_ticks_only" . bool: draw x-axis ticks with label only on whole
176 values; 'false'
177 "max_val" ............ pos_int: maximum value on y-axis; "undef"
179 "max_x_ticks" ........ pos_int: maximum of ticks and labels to draw on
181 x-axis; 100
182 "max_y_ticks" ........ pos_int: maximum of ticks and labels to draw on
184 y-axis; 100
185 "min_val" ............ pos_int: maximum value on y-axis; "undef"
187 "min_x_ticks" ........ pos_int: minimum of ticks and labels to draw on
189 x-axis; 6 (min 2)
190 "min_y_ticks" ........ pos_int: minimum of ticks and labels to draw on
192 y-axis; 6 (min 2)
193 "precision" .......... pos_int: nr. of numerals after the decimal point
195 in axis labels; 3
196 "skip_int_ticks" ..... pos_int: draw only n'th tick on whole x-value; 1
198 (if "integer_ticks_only")
199 "skip_x_ticks" ....... pos_int: draw only every n'th tick with label; 1
201 "sort" ............... bool: sort data in ascending order; 'false'
203 "tick_label_font" .... "font" of tick labels; GD::Font->Small
205 "tick_len" ........... pos_int: length of the x- and y-ticks in pixels;
207 4
208 "x_grid_lines" ....... bool: vertical grid lines matching x ticks;
210 'false'
211 "x_ticks" ............ qw[normal staggered vertical]: style of x-axis
213 labels; 'normal'
214 "xy_plot" ............ bool: forces x-y-graph, with numeric x-axis;
216 'false'
217 "y_axes" ............. ('left', 'right', 'both'): position of
219 y-axis;'left'
220 "y_grid_lines" ....... bool: horizontal grid lines matching y ticks;
222 'false'
223 Bars
225 This includes Bars StackedBars and HorizontalBars.
226 "spaced_bars" ........ bool: leave space between the groups of bars;
228 'true'
229 HorizontalBars
231 "skip_y_ticks" ....... pos_int: draw every n'th tick with label on
232 y-axis; 1
233 Composite
235 "brush_style1" ....... brush style of points associated with left
236 y-axis; "undef"
237 "brush_style2" ....... brush style of points associated with right
239 y-axis; "undef"
240 "composite_info" ..... (array of arrays) which data sets produce which
242 chart types; "undef"
243 "f_y_tick1" .......... "code" that transforms "would have" into actual
245 label on left y-axis; "undef"
246 "f_y_tick2" .......... "code" that transforms "would have" into actual
248 label on right y-axis; "undef"
249 "legend_example_size" Length of the color example line in legend in
251 pixel; 20
252 "max_val1" ........... "code" maximum y value on the left axis; "undef"
254 "max_val2" ........... "code" maximum y value on the right axis;
256 "undef"
257 "min_val1" ........... "code" minimum y value on the left axis; "undef"
259 "min_val2" ........... "code" minimum y value on the right axis;
261 "undef"
262 "same_y_axes" ........ "code" both y-axis have same min and max;
264 "undef"
265 "y_ticks1" ........... pos_int: number of y ticks on left y-axis;
267 "undef"
268 "y_ticks2" ........... pos_int: number of y ticks on right y-axis;
270 "undef"
271 Direction
273 "angle_interval" ..... pos_int: angle between radial lines; 30
274 "arrow" .............. bool: paint points as arrows; 'false'
276 "brush_size" ......... pos_int: width of the lines in pixels; 6
278 "line" ............... bool: connected points with lines; 'false'
280 "max_circles" ........ pos_int: max nr. of coordinate grid circles; 100
282 "min_circles" ........ pos_int: min nr. of coordinate grid circles; 4
284 (min. 2)
285 "pair" ............... bool: use odd numbered data sets to build pairs
287 with the next; 'false'
288 "point" .............. bool: paint points at all (or only lines);
290 'false'
291 "polar" .............. bool: reverse x axis; 'false'
293 "pt_size" ............ pos_int: radius of points in pixels; 18
295 ErrorBars
297 "brush_size" ......... pos_int: width of the lines in pixels; 6
298 "pt_size" ............ pos_int: radius of points in pixels; 18
300 "same_error" ......... bool: same values for upper and lower error
302 bounds; 'false'
303 Lines
305 including chart type LinesPoints
306 "brush_size" ......... pos_int: width of the lines in pixels; 6
308 Points
310 including chart type LinesPoints
311 "brushStyle" ......... shape of the points; 'FilledCircle'
313 "pt_size" ............ pos_int: radius of points in pixels; 18
315 Pie
317 "label_values" ....... qw[percent value both none]: label content on
318 pie slice label; 'percent'
319 "legend_label_values" qw[percent value both none]: label content in
321 the legend; 'value'
322 "legend_lines" ....... bool: draw lines connecting pie slices and
324 label; 'false'
325 "ring" ............... "real": percentage of visible radius; 1 (full
327 pie)
328 Split
330 "interval" ........... pos_int: interval of a plot segment; 'undef'
331 "interval_ticks" ..... pos_int: number of ticks on x-axis; 5
333 "scale" .............. "integer": factor for y-values; 1
335 "start" .............. "integer": start value of the first interval;
337 'undef'
338
340 angle_interval
341 "Direction" only: how many radial lines should be drawn. The default
342 value is 30, which means that a line will be drawn every 30 degrees.
343 Valid Values are: 0, 5, 10, 15, 20, 30, 45 and 60. If you choose 0,
344 direction will draw no line.
345 arrow
347 "Direction" only: Bool that if 'true', chart will draw a arrow from the
348 center to the point. Defaults to 'false'.
349 brush_size
351 "Lines" only: Integer sets the width of the lines in pixels. Default is
352 6.
353 background
355 see "colors"
356 brushStyle
358 Sets the shape of points for Chart::Points, Chart::LinesPoints.
359 Possible values are: 'FilledCircle', 'circle', 'donut', 'OpenCircle',
361 'fatPlus', 'triangle', 'upsidedownTriangle', 'square', 'hollowSquare',
362 'OpenRectangle', 'FilledDiamond', 'OpenDiamond', 'Star', 'OpenStar'.
363 Default: 'FilledCircle'. Look at Demo at "Points" in
364 Chart::Manual::Types.
365 brush_style1
367 "Composite" only: brush style of points associated with left y-axis.
368 brush_style2
370 "Composite" only: brush style of points associated with right y-axis.
371 colors
373 The key "colors" is special, because there are a lot of things that
374 need to be colored. That's why its value is a hash with keys within,
375 which name what exactly needs to be colored. Their value has to be a
376 color definition (name, RGB array ref or HSL hash ref):
377 $obj->set('colors' => {'background' => [255,255,255]});
379 sets the background color to white (which is the default). Valid keys
381 are:
382 'background' (background color for the image)
384 'title' (color of the title)
385 'text' (all the text in the chart)
386 'x_label' (color of the x-axis label)
387 'y_label' (color of the first y axis label)
388 'y_label2' (color of the second y axis label)
389 'grid_lines' (color of the grid lines)
390 'x_grid_lines' (color of the x grid lines - for x axis ticks)
391 'y_grid_lines' (color of the y grid lines - for to left y axis ticks)
392 'y2_grid_lines' (color of the y2 grid lines - for right y axis ticks)
393 'dataset0'..'dataset63' (the different datasets)
394 'misc' (everything else, ie. axis, ticks, box around the legend)
395 NB. For composite charts, there is a limit of 8 datasets per component.
397 The colors for 'dataset8' through 'dataset15' become the colors for
398 'dataset0' through 'dataset7' for the second component chart.
399 composite_info
401 "Composite" only: information about which data set gets visualized by
402 which chart type. It should be a reference to an array of array
403 references, containing information like the following:
404 $obj->set ('composite_info' => [ ['Bars', [1,2]],
406 ['Lines', [3,4] ] ]);
407 This example would set the two component charts to be a bar chart and a
409 line chart. It would use the first two data sets for the bar chart
410 (note that the numbering starts at 1, not zero like most of the other
411 numbered things in Chart), and the second two data sets for the line
412 chart. The default is undef.
413 NB. Chart::Composite can only do two component charts.
415 custom_x_ticks
417 Used in "Points", "Lines", "Linespoints", "Errorbars", and "Bars"
418 charts. This option allows you to you to specify exactly which x-ticks
419 and x-tick labels should be drawn. It should be assigned a reference
420 to an array of desired ticks. Just remember that I'm counting from the
421 0th element of the array. (ie., if 'custom_x_ticks' is assigned
422 [0,3,4], then the 0th, 3rd, and 4th x-ticks will be displayed)
423 datasetx
425 see "colors"
426 f_x_tick
428 Needs a reference to a function ("code") which uses the x-tick labels
429 generated by the '@data[0]' as the argument. The result of this
430 function can reformat the labels. For instance
431 $obj -> set ('f_x_tick' => \&formatter );
433 An example for the function formatter: x labels are seconds since an
435 event. The referenced function can transform this seconds to hour,
436 minutes and seconds.
437 f_y_tick
439 The same situation as for 'f_x_tick' but now used for y labels.
440 f_y_tick1
442 "Composite" only: "code" ref to a function which has one argument and
443 has to return a string which labels the first resp. second y axis.
444 Both default to undef.
445 f_y_tick2
447 "Composite" only: "code" ref to a function which has one argument and
448 has to return a string which labels the first resp. second y axis.
449 Both default to undef.
450 graph_border
452 "Pie" only: Sets the number of pixels used as a border between the
453 title/labels and the actual graph within the image. Defaults to 10.
454 grey_background
456 Puts a nice soft grey background on the data plot area when set to
457 'true'. Default is 'true'.
458 grid_lines
460 bool: draw grid lines matching up to x and y ticks. Default is
461 'false'.
462 imagemap
464 Lets Chart know you're going to ask for information about the placement
465 of the data for use in creating an image map from the png. This
466 information can be retrieved using the imagemap_dump() method. NB.
467 that the imagemap_dump() method cannot be called until after the Chart
468 has been generated.
469 include_zero
471 If 'true', forces the y-axis to include zero if it is not in the
472 dataset range. Default is 'false'.
473 In general, it is better to use this, than to set the "min_val" if that
475 is all you want to achieve.
476 integer_ticks_only
478 bool specifies to draw the x- and y-ticks at floating point values (as
479 normal) or when set to 'true' only at integer values. Default: 'false'
480 interval
482 "Split" only: Sets the interval of one partition of plot. Defaults
483 'undef'.
484 interval_ticks
486 "Split" only: Number of ticks for the x-axis. Defaults to 5.
487 label_font
489 This option changes the "font" of the axis labels. Default is
490 GD::Font->MediumBold.
491 label_values
493 "Pie" only: What kind of value labels to show alongside the pie. Valid
494 values are 'percent', 'value', 'both' and 'none'. Defaults to
495 'percent'.
496 legend
498 Specifies the placement of the legend. Valid values are 'left',
499 'right', 'top', 'bottom'. Setting this to 'none' tells chart not to
500 draw a legend. Default is 'right'.
501 legend_example_size
503 "Composite" only: Length of the example line in the legend in pixels.
504 Defaults to 20.
505 legend_font
507 This option changes the "font" of the text in the legend. Default is
508 GD::Font->Small.
509 legend_labels
511 Array reference containing texts, which are the labels assigned to each
512 color in the legend. Amount has to correspond to the amount of data
513 sets.
514 @labels = ('foo', 'bar');
516 $obj->set ('legend_labels' => \@labels);
517 Default is empty, in which case 'Dataset 1', 'Dataset 2', etc. are used
519 as the labels.
520 legend_label_values
522 "Pie" only: What labels to draw in the legend. Valid values are
523 c<'percent'>, 'value', 'both' and 'none'. Defaults to 'value'.
524 legend_lines
526 "Pie" only: bool to decide if lines connecting pie slices and label are
527 drawn. Default is 'false'.
528 label_values
530 "Pie" only: Labels to draw beside the pie slices. Valid values are
531 'percent', 'value', 'both' and 'none'. Defaults to 'percent'.
532 line
534 "Direction" only: If you turn this option to 'true', then point will be
535 connected with lines. Defaults to 'false'.
536 max_circles
538 "Direction" only: Sets the maximum number of circles in the coordinate
539 system. Default is 100. This limit is used to avoid plotting an
540 unreasonable large number of ticks if non-round values are used for the
541 min_val and max_val.
542 max_val
544 Sets the maximum y-value on the graph, overriding the normal auto-
545 scaling. Default is undef.
546 max_val1
548 "Composite" only: Maximum y-value for the first (left y-axis)
549 components. Default to undef.
550 max_val2
552 "Composite" only: Maximum y-value for the second (right y-axis)
553 components. Default to undef.
554 max_x_ticks
556 Work similar as 'max_y_ticks' and 'min_y_ticks'. Of course, only for a
557 xy_plot.
558 max_y_ticks
560 Sets the maximum number of y_ticks to draw when generating a scale.
561 Default is 100. This limit is used to avoid plotting an unreasonable
562 large number of ticks if non-round values are used for the min_val and
563 max_val.
564 The value for 'max_y_ticks' should be at least 5 times larger than
566 'min_y_ticks'.
567 min_circles
569 "Direction" only: Sets the minimum number of circles when generating a
570 scale for direction. Default is 4, minimum is 2.
571 min_val
573 Sets the minimum y-value on the graph, overriding the normal auto-
574 scaling. Default is undef.
575 Caution: should be used when setting 'max_val' and 'min_val' to
577 floating point or non-round numbers. This is because the scale must
578 start & end on a tick, ticks must have round-number intervals, and
579 include round numbers.
580 Example: Suppose your data set has a range of 35-114 units. If you
582 specify them as the 'min_val' & 'max_val', the y_axis will be plotted
583 with 80 ticks every 1 unit.. If no 'min_val' & 'max_val', the system
584 will auto scale the range to 30-120 with 10 ticks every 10 units.
585 If the 'min_val' & 'max_val' are specified to excessive precision, they
587 may be overridden by the system, plotting a maximum 'max_y_ticks'
588 ticks.
589 min_val1
591 "Composite" only: Minimum y-value for the first (left y-axis)
592 component. Default to undef.
593 min_val2
595 "Composite" only: Minimum y-value for the second (right y-axis)
596 component. Default to undef.
597 min_x_ticks
599 Work similar as 'max_y_ticks' and 'min_y_ticks'. Of course, only for a
600 xy_plot.
601 min_y_ticks
603 Sets the minimum number of y_ticks to draw when generating a scale.
604 Default is 6, The minimum is 2.
605 no_cache
607 Adds Pragma: no-cache to the http header while output for CGI. Be
608 careful with this one, as Netscape 4.5 is unfriendly with POST using
609 this method.
610 pairs
612 Direction only: bool if 'true', Chart uses the first dataset as a set
613 of degrees and the second dataset as a set of values. Then, the third
614 set is a set of degrees and the fourth a set of values ... If 'pairs'
615 is set to 'false', Chart uses the first dataset as a set of angels and
616 all following datasets as sets of values. Defaults to 'false'.
617 png_border
619 Sets the number of pixels used as a border between the graph and the
620 edges of the image. Defaults to 10.
621 point
623 Indicates to draw points in a direction chart. 'true' or 'false'
624 possible. Defaults to 'true'.
625 polar
627 "Direction" only: If set 'true', the maximum x value is in the center
628 of the coordinate system. Defaults to 'false'.
629 precision
631 Sets the number of numerals after the decimal point. Affects in most
632 cases the y-axis. But also the x-axis if "xy_plot" was set and also the
633 labels in a pie chart. Defaults to 3.
634 pt_size
636 "Points" and "LinesPoints" only: Sets the radius of the points in
637 pixels. Default is 18.
638 ring
640 "Pie" only: sets the "thickness" of the pie, the percentage of the
641 radius, which is visible. Defaults to 1 (full pie chart). Good values
642 are between 0.2 and 0.4.
643 scale
645 "Split" only: Every y-value will be multiplied with that value, but the
646 scale won't change. Which means that split allows one to overdraw
647 certain rows! Only useful if you want to give prominence to the
648 maximal amplitudes of the data. Defaults to 1.
649 same_error
651 "ErrorBars" only: It tells chart that you want use the same error value
652 of a data point if set to 'true'. Look at the documentation to see how
653 the module ErrorBars works. Default: 'false'.
654 same_y_axes
656 "Composite" only: Forces both component charts to use the same maximum
657 and minimum y-values if set to 'true'. This helps to keep the
658 composite charts from being too confusing. Default is "undef".
659 skip_int_ticks
661 If 'true' the labels and ticks will be drawn every nth tick. Of course
662 in horizontalBars it affects the x-axis. Default to 1, no skipping.
663 skip_x_ticks
665 Sets the number of x-ticks and x-tick labels to skip. (ie. if
666 'skip_x_ticks' was set to 4, Chart would draw every 4th x-tick and
667 x-tick label). Default is "undef".
668 skip_y_ticks
670 "HorizontalBars" only: Draw only every n'th tick with label on y-axis.
671 does for other charts. Defaults to 1 (draw all).
672 sort
674 In a xy-plot, the data will be sorted ascending if set to 'true'.
675 (Should be set if the data isn't sorted, especially in Lines, Split and
676 LinesPoints) In a Pareto Chart the data will be sorted descending.
677 Defaults to 'false'.
678 spaced_bars
680 "Bars" only: Leaves space between the groups of bars at each data point
681 when set to 'true'. This just makes it easier to read a bar chart.
682 Default is 'true'.
683 start
685 "Split" only: Sets the start value of the first interval. If the x
686 coordinate of the first data point is zero, you should 'set' to zero.
687 Default is 'undef'.
688 sub_title
690 Write a sub-title under the "title" in smaller letters. Default is
691 empty.
692 text_space
694 Sets the amount of space left on the sides (lext and right) of text,
695 (title, legend, label) to make it more readable. Defaults to 2.
696 tick_label_font
698 This is the font for the tick labels. It also needs a GD font object as
699 an argument. Default is GD::Font->Small.
700 tick_len
702 Sets the length of the x- and y-ticks in pixels. Default is 4.
703 title
705 Content of title text. If empty, no title is drawn. It recognizes '\n'
706 as a newline, and acts accordingly. Remember, if you want to use
707 normal quotation marks instead of single quotation marks then you have
708 to quote "\\n". Default is empty.
709 title_font
711 This option changes the "font" of the title. Default is
712 GD::Font->Large.
713 transparent
715 Makes the background of the whole image transparent if set to 'true'.
716 Useful for making web page images. Default is 'false'.
717 x_grid_lines
719 Draws vertical grid lines matching up to x ticks if set to 'true'.
720 Default is 'false'.
721 x_label
723 Tells Chart what to use for the x-axis label. If empty, no label is
724 drawn. Default is empty.
725 x_ticks
727 Specifies how to draw the x-tick labels. Valid values are 1: 'normal',
728 2: 'staggered' (alternating on upper and lower row - for very long
729 labels), and 3: 'vertical' (the labels are draw upwards in right
730 angle). Default is 'normal'.
731 xy_plot
733 Forces Chart to plot a x-y-graph, which means, that the x-axis is also
734 numeric if set to 'true'. Very useful for mathematical graphs. Works
735 for Lines, Points, LinesPoints and ErrorBars. Split makes always a
736 xy_plot. Defaults to 'false'.
737 y_label
739 Tells Chart what to use for labels on the standard, left y-axis. If
740 empty, no label is drawn. Default is empty ('').
741 y_label2
743 Text of the label on the second, right y-axis (if different from left).
744 If empty, no label is drawn. Default is empty ('').
745 y_axes
747 Tells Chart where to place the y-axis. Has no effect on Composite and
748 Pie. Valid values are 'left', 'right' and 'both'. Defaults to 'left'.
749 y_grid_lines
751 Draws horizontal grid lines matching up to y ticks if set to 'true'.
752 Default is 'false'.
753 y_ticks1
755 Composite only: number of y ticks to use on the first and second y-axis
756 (y_ticks2). Please note that if you just set the 'y_ticks' option,
757 both axes will use that number of y ticks. Both default to undef.
758 y_ticks2
760 see "y_ticks1"
761
763 Copyright 2022 David Bonner, Herbert Breunung.
764 This program is free software; you can redistribute it and/or modify it
766 under same terms as Perl itself.
767
769 David Bonner, <chartgrp@web.de>
770 Herbert Breunung, <lichtkind@cpan.org>
772perl v5.36.0 2022-08-01 Chart::Manual::Properties(3)