Bar charts on a curve - NewsPageDesigner2019-09-21T22:14:17Zhttp://newspagedesigner.org/forum/topics/bar-charts-on-a-curve?feed=yes&xn_auth=nocan it be done in coreldraw
tag:newspagedesigner.org,2018-02-03:1993196:Comment:8693602018-02-03T13:18:04.635Zneerajtiwarihttp://newspagedesigner.org/profile/neerajtiwari
<p>can it be done in coreldraw</p>
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<p>can it be done in coreldraw</p>
<p></p> i did a blog entry about this…tag:newspagedesigner.org,2012-11-20:1993196:Comment:3994222012-11-20T05:52:36.793Zmartin geehttp://newspagedesigner.org/profile/martingee
<p>i did a blog entry about this on my old website / blog. i'm reposting it here:</p>
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<p>a circle walks into a bar chart</p>
<p>Thursday, January 27, 2011</p>
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<p>I love the current enthusiasm with infographics and data visualization. I’m hooked. On a regular basis, we see beautiful examples but that’s it. They’re just pretty. Specifically, I’ve been fascinated with circular bar charts (and their Tron-esque aesthetic) but don’t know what I’m looking at most of the time. Due to…</p>
<p>i did a blog entry about this on my old website / blog. i'm reposting it here:</p>
<p></p>
<p>a circle walks into a bar chart</p>
<p>Thursday, January 27, 2011</p>
<p></p>
<p>I love the current enthusiasm with infographics and data visualization. I’m hooked. On a regular basis, we see beautiful examples but that’s it. They’re just pretty. Specifically, I’ve been fascinated with circular bar charts (and their Tron-esque aesthetic) but don’t know what I’m looking at most of the time. Due to their nature, they lack a major component: accuracy. </p>
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<p>You can't simply build a circular bar chart from a pie chart (I did use pie charts to make my examples. See fig. b.). With each concentric circle, there’s a different circumference. That’s why runners start at different points to compensate to run the same distance and end at the finish line. On a record, the outer grooves travel faster and farther than the inner grooves. There’s math and geometry behind the “inside track”.</p>
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<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/1480549866?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/1480549866?profile=original" width="347" class="align-full"/></a></p>
<p><b>fig. a</b></p>
<p>Are these all equal? Nope. Each line is 25% of the circle but as a bar chart, each curve's length or value (25% of that circle's circumference) is different. Values below.</p>
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<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/1480550358?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/1480550358?profile=original" width="347" class="align-full"/></a></p>
<p><b>fig. b</b></p>
<p>These 4 curves have the same value / length calculated as a percentage of the circumferences. The same values look distorted. The math is below.</p>
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<p><a href="http://storage.ning.com/topology/rest/1.0/file/get/1480550395?profile=original" target="_self"><img src="http://storage.ning.com/topology/rest/1.0/file/get/1480550395?profile=original" width="631" class="align-full"/></a></p>
<p><b>fig. c</b></p>
<p>Even with a bigger circle and same line weights, there’s distortion at every size.</p>
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<p>How can you compare and contrast information if equal values look different?</p>
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<p><b>the math:</b></p>
<p>First circle: d = 1”, C1 = π • 1” = 3.14“</p>
<p>Red line length = 3.14” x 0.25 = 0.785” = the value I want to show in each line</p>
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<p>Second circle: d = 1.25”, C2 = π • 1.25” = 3.925”</p>
<p>Green line length = 0.785” / 3.925” = 20% of the circumference</p>
<p>Curve drawn from 20% pie chart </p>
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<p>Third circle: d = 1.5“, C3 = π • 1.5” = 4.71”</p>
<p>Cyan line length = 0.785“ / 4.71” = 16.667% of the circumference</p>
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<p>Fourth circle: d = 1.75“, C4 = π • 1.75” = 5.495”</p>
<p>Orange line length = 0.785 / 5.495 = 14.286% of the circumference</p>
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<p>The lengths in fig. a: 0.785”, 0.981”, 1.178” and 1.374”</p>
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<p>--</p>
<p>These are cool and beautiful ways to show data but are they easy to read and useful? Not really. The battle between form and function rages on and remember to check your math.</p>
<p></p> You can convert percentages,…tag:newspagedesigner.org,2012-10-23:1993196:Comment:3916532012-10-23T07:19:10.829ZBob Voroshttp://newspagedesigner.org/profile/BobVoros
<p>You can convert percentages, or any value, into degrees of an arc. For example, if you "barc" chart - I'm copyrighting that - is a semi circle that would be 180• (degrees). So if 100% = 180• then each percentage point would equal 1.8• and all you would have to do is the math on every value - 40% would be 72•, 60% would be 108•, etc.</p>
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<p>You can convert percentages, or any value, into degrees of an arc. For example, if you "barc" chart - I'm copyrighting that - is a semi circle that would be 180• (degrees). So if 100% = 180• then each percentage point would equal 1.8• and all you would have to do is the math on every value - 40% would be 72•, 60% would be 108•, etc.</p>
<p></p> Best way, and to keep it accu…tag:newspagedesigner.org,2012-10-17:1993196:Comment:3906052012-10-17T13:33:40.420ZNigel Hawtinhttp://newspagedesigner.org/profile/NigelHawtin
<p>Best way, and to keep it accurate is to work it out it manually</p>
<p>Best way, and to keep it accurate is to work it out it manually</p> Hi, I'm not an expert, but ho…tag:newspagedesigner.org,2012-10-02:1993196:Comment:3853532012-10-02T07:42:01.769ZSajeev Kumarapuramhttp://newspagedesigner.org/profile/sajeevkumarapuram
<p>Hi, I'm not an expert, but how I do it is... place the bar chart in Illustrator and use the Effect>Warp>Arc.</p>
<p>Hi, I'm not an expert, but how I do it is... place the bar chart in Illustrator and use the Effect>Warp>Arc.</p>