{"id":2362,"date":"2020-11-24T21:02:01","date_gmt":"2020-11-25T05:02:01","guid":{"rendered":"https:\/\/www.lightsondata.com\/?post_type=tva_lesson&#038;p=2362"},"modified":"2021-01-07T20:48:26","modified_gmt":"2021-01-08T04:48:26","slug":"bar-graph","status":"publish","type":"tva_lesson","link":"https:\/\/www.lightsondata.com\/course\/bar-graph\/","title":{"rendered":"Bar Graph"},"content":{"rendered":"<h2>Alternative Definition<\/h2>\n<p>A bar graph is a chart that plots data using rectangular bars or columns (also called bins) that represent the total amount of observations in the data for that category. Bar charts can be displayed with vertical columns, horizontal bars, comparative bars (multiple bars to show a comparison between values), or stacked bars (bars contain multiple types of information).<\/p>\n<h2>History of the Bar Graph<\/h2>\n<p>You can debate who was the inventor of the bar graph. Here are two referenced examples:<\/p>\n<p>1. &#8220;The commercial and political atlas and statistical breviary&#8221; book by William Playfair, 1786<\/p>\n<p>Example of &#8220;the first bar graph&#8221;: Exports and Imports of Scotland to and from different parts for one year from Christmas 1780 to Christmas 1781<\/p>\n<p><span><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"2515\" data-permalink=\"https:\/\/www.lightsondata.com\/1786_playfair_-_exports_and_imports_of_scotland_to_and_from_different_parts_for_one_year_from_christmas_1780_to_christmas_1781\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?fit=1137%2C763&amp;ssl=1\" data-orig-size=\"1137,763\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1302917988&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?fit=300%2C201&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?fit=1024%2C687&amp;ssl=1\" alt=\"\" data-id=\"2515\" width=\"749\" data-init-width=\"1137\" height=\"502\" data-init-height=\"763\" title=\"1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781\" loading=\"lazy\" src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?resize=749%2C502&#038;ssl=1\" data-width=\"749\" data-height=\"502\" data-lazy-src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?ssl=1\"><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"2515\" data-permalink=\"https:\/\/www.lightsondata.com\/1786_playfair_-_exports_and_imports_of_scotland_to_and_from_different_parts_for_one_year_from_christmas_1780_to_christmas_1781\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?fit=1137%2C763&amp;ssl=1\" data-orig-size=\"1137,763\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1302917988&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?fit=300%2C201&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?fit=1024%2C687&amp;ssl=1\" alt=\"\" data-id=\"2515\" width=\"749\" data-init-width=\"1137\" height=\"503\" data-init-height=\"763\" title=\"1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781\" loading=\"lazy\" src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/1786_Playfair_-_Exports_and_Imports_of_Scotland_to_and_from_different_parts_for_one_Year_from_Christmas_1780_to_Christmas_1781.jpg?resize=749%2C503&#038;ssl=1\" data-width=\"749\" data-height=\"503\"><\/span><\/p>\n<p>2. &#8220;The latitude of forms&#8221; book by Nicole Oresme, 1300s<\/p>\n<p><span><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"2516\" data-permalink=\"https:\/\/www.lightsondata.com\/latitude-of-forms\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?fit=300%2C282&amp;ssl=1\" data-orig-size=\"300,282\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"latitude of forms\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?fit=300%2C282&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?fit=300%2C282&amp;ssl=1\" alt=\"\" data-id=\"2516\" width=\"240\" data-init-width=\"300\" height=\"226\" data-init-height=\"282\" title=\"latitude of forms\" loading=\"lazy\" src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?resize=240%2C226&#038;ssl=1\" data-width=\"240\" data-height=\"226\" data-lazy-src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?ssl=1\"><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"2516\" data-permalink=\"https:\/\/www.lightsondata.com\/latitude-of-forms\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?fit=300%2C282&amp;ssl=1\" data-orig-size=\"300,282\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"latitude of forms\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?fit=300%2C282&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?fit=300%2C282&amp;ssl=1\" alt=\"\" data-id=\"2516\" width=\"300\" data-init-width=\"300\" height=\"282\" data-init-height=\"282\" title=\"latitude of forms\" loading=\"lazy\" src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/latitude-of-forms.png?resize=300%2C282&#038;ssl=1\" data-width=\"300\" data-height=\"282\"><\/span><\/p>\n<p>Example of another &#8220;first bar graph&#8221;: Velocity of a constantly accelerating object against time<\/p>\n<p>3. Lectures in history in general policy, by Joseph Priestley, 1765<\/p>\n<p>Example of another &#8220;bar graph&#8221;: A specimen of a chart of biography<\/p>\n<p><span><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"2517\" data-permalink=\"https:\/\/www.lightsondata.com\/joseph_priestley_a-chart_of_history\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?fit=700%2C334&amp;ssl=1\" data-orig-size=\"700,334\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Joseph_Priestley_A-Chart_Of_History\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?fit=300%2C143&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?fit=700%2C334&amp;ssl=1\" alt=\"\" data-id=\"2517\" width=\"700\" data-init-width=\"700\" height=\"334\" data-init-height=\"334\" title=\"Joseph_Priestley_A-Chart_Of_History\" loading=\"lazy\" src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?resize=700%2C334&#038;ssl=1\" data-width=\"700\" data-height=\"334\" data-lazy-src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?ssl=1\"><img data-recalc-dims=\"1\" decoding=\"async\" data-attachment-id=\"2517\" data-permalink=\"https:\/\/www.lightsondata.com\/joseph_priestley_a-chart_of_history\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?fit=700%2C334&amp;ssl=1\" data-orig-size=\"700,334\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Joseph_Priestley_A-Chart_Of_History\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?fit=300%2C143&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?fit=700%2C334&amp;ssl=1\" alt=\"\" data-id=\"2517\" width=\"700\" data-init-width=\"700\" height=\"334\" data-init-height=\"334\" title=\"Joseph_Priestley_A-Chart_Of_History\" loading=\"lazy\" src=\"https:\/\/i0.wp.com\/www.lightsondata.com\/wp-content\/uploads\/2020\/11\/Joseph_Priestley_A-Chart_Of_History.gif?resize=700%2C334&#038;ssl=1\" data-width=\"700\" data-height=\"334\"><\/span><\/p>\n<h2>Types of Bar Graphs<\/h2>\n<ul>\n<li>Horizontal&nbsp;<\/li>\n<li>Vertical<\/li>\n<li>Stacked&nbsp;<\/li>\n<li>Clustered<\/li>\n<li>Circular<\/li>\n<li>Lollipop<\/li>\n<\/ul>\n<h2>Considerations for Using a Horizontal vs. Vertical Bar Graph<\/h2>\n<ul>\n<li>Readability of labels<\/li>\n<li>Number of categories<\/li>\n<li>Presence of negative values<\/li>\n<li>Representation of time<\/li>\n<\/ul>\n<h2>Visualization Best Practices<\/h2>\n<p><strong>Gaps<\/strong><\/p>\n<ul>\n<li>Use gaps as otherwise your bar graph will look like a histogram<\/li>\n<li>Gap size should be about half to a quarter of the size of the bar itself<\/li>\n<\/ul>\n<p><strong>Bar length\/width <\/strong><\/p>\n<ul>\n<li>A minimum 10:1 ratio is probably a good rule of thumb to follow between the length\/width<\/li>\n<li>Read more in &#8220;<a href=\"https:\/\/docplayer.net\/39981458-Bar-widths-and-the-spaces-in-between.html\" target=\"_blank\" rel=\"nofollow noopener\" style=\"outline: none;\">Bar widths and the spaces in between<\/a>&#8221; from Stephen Few&#8217;s Visual Business Intelligence Newsletter<\/li>\n<\/ul>\n<p><strong>Baseline<\/strong><\/p>\n<ul>\n<li>Start your bar graph at 0 as otherwise you end up with a torn graph that might provide the wrong message to the end user<\/li>\n<li>The use of truncated graphs is discouraged, but if you use them, make sure to signal that to the end user<\/li>\n<\/ul>\n<p><strong>Labels<\/strong><\/p>\n<ul>\n<li>Use horizontal labeling<\/li>\n<li>If labels clash with one another, use abbreviations, acronyms, a legend, or even better show a horizontal bar graph<\/li>\n<\/ul>\n<p><strong>Trends<\/strong><\/p>\n<ul>\n<li>It&#8217;s helpful to pre-sort from largest to smallest and vice-versa<\/li>\n<li>If showing trends over time, stay true to the chronological order of your categories<\/li>\n<\/ul>\n<p><strong>Annotations<\/strong><\/p>\n<ul>\n<li>Place them in the middle or at the ends of the bars<\/li>\n<\/ul>\n<p><strong>Colors<\/strong><\/p>\n<ul>\n<li>Use colors in moderation, especially when you have 5-7 or more categories<\/li>\n<li>Use color with purpose; sometimes there&#8217;s not a need to color each category differently<\/li>\n<li>If you don&#8217;t know what colors to use, you can just default to your company colors<\/li>\n<\/ul>\n<h2>Another Bar Joke<\/h2>\n<p>A bartender walks into a bar. The bartender says to the bartender:<\/p>\n<p>&nbsp;\u201cWelcome to my bar fellow bartender, what can I get you? Some bar food perhaps?\u201d<\/p>\n<p>&nbsp;To which the bartender replied:<\/p>\n<p>&nbsp;\u201cI\u2019ll have a steak bar the barbecue sauce.\u201d Said the bartender.<\/p>\n<p>&nbsp;The bartender, a little offended that the bartender barred the barbecue sauce said:<\/p>\n<p>&nbsp;\u201cOur barbecue sauce is the best in world bar none. We import our barbecue from Barcelona.\u201d<\/p>\n<p>&nbsp;Impressed with the bartenders exotic barbecue he agreed to the use of the sauce. The bartender served the bartender his steak with barbecue from Barcelona and all was well. Then, the bartender full from barbecue, got all red.<\/p>\n<p>&nbsp;\u201cWas there barley in that barbecue from Barcelona?! I\u2019m allergic to barley!\u201d<\/p>\n<p>&nbsp;\u201cWell of course there was! Barbecue from Barcelona always has barley!\u201d<\/p>\n<p>Furious, the red-faced bartender barked:<\/p>\n<p>\u201cYou\u2019re in trouble now! You\u2019re going to be behind bars after I release a carefully plotted graph representing the opinions of your bar!\u201d&nbsp;<\/p>\n<p>\u201cLet me guess! A BAR GRAPH?!?!\u201d<\/p>\n<p>&nbsp;\u201cNo, a poll.\u201d<\/p>\n","protected":false},"template":"","class_list":["post-2362","tva_lesson","type-tva_lesson","status-publish","hentry","tva_courses-data-visualization-for-data-storytelling","post-wrapper","thrv_wrapper"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LightsOnData<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lightsondata.com\/course\/bar-graph\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bar Graph | LightsOnData\" \/>\n<meta property=\"og:description\" content=\"When to best use bar graphs, their history, different types of bar graphs, and data visualization best practices for bar graphs.\" \/>\n<meta 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