{"id":2390,"date":"2022-01-19T09:59:26","date_gmt":"2022-01-19T00:59:26","guid":{"rendered":"http:\/\/ds.sumeun.org\/?p=2390"},"modified":"2022-01-20T10:46:49","modified_gmt":"2022-01-20T01:46:49","slug":"3%ed%8c%90-%eb%a7%9b%eb%b3%b4%ea%b8%b0-%ec%b8%a1%ec%a0%95%eb%8b%a8%ec%9c%84","status":"publish","type":"post","link":"http:\/\/ds.sumeun.org\/?p=2390","title":{"rendered":"3\ud310 \ub9db\ubcf4\uae30) \uce21\uc815\ub2e8\uc704"},"content":{"rendered":"<p>\uc774 \ucc45\uc5d0\uc11c \uc790\uc8fc \uc0ac\uc6a9\ud55c \ub370\uc774\ud130 mtcars\uc5d0\ub294 mpg\uc5f4\uc774 \uc788\ub2e4. \uc5ec\uae30\uc11c mpg\ub294 miles per gallon<br \/>\n\uc744 \uc758\ubbf8\ud55c\ub2e4. \ub9c8\uc77c(mile)\uacfc \uac24\ub7f0(gallon)\uc740 \uae38\uc774\uc640 \ubd80\ud53c\ub97c \uce21\uc815\ud558\uae30 \uc704\ud574 \uc601\ubbf8\uad6d\uac00\uc5d0\uc11c<br \/>\n\uc0ac\uc6a9\ud558\ub294 \ub2e8\uc704\uc774\ub2e4. mpg \uc5f4\uc740 1 \ub9c8\uc77c(\uc57d 1.6 km)\ub97c \uac00\uae30 \uc704\ud574 \ud544\uc694\ud55c \uc11d\uc720\uc758 \ubd80\ud53c\ub97c \uac24\ub7f0<br \/>\n(\uc57d 3.7 L) \ub2e8\uc704\ub85c \uce21\uc815\ud55c \uc5f0\ube44 \ub2e8\uc704\uc774\ub2e4. \ud558\uc9c0\ub9cc \ub9c8\uc77c\uacfc \uac24\ub7f0\uc740 \uc6b0\ub9ac\uc5d0\uac8c \uc0dd\uc18c\ud558\ub2e4. \uc6b0\ub9ac\ub294<br \/>\n\uae38\uc774\uc640 \ubd80\ud53c\ub97c \uce21\uc815\ud560 \ub54c \uad6d\uc81c \ud45c\uc900 \ub2e8\uc704\uc778 \ubbf8\ud130(meter)\uc640 \ub9ac\ud130(liter)\ub97c \uc4f0\uae30 \ub54c\ubb38\uc774\ub2e4.<\/p>\n<p>&nbsp;<\/p>\n<p>(\uc911\ub7b5)<\/p>\n<p>&nbsp;<\/p>\n<p>R\uc5d0\uc11c\ub294 \ub2e8\uc704\ub97c \uc5b4\ub5bb\uac8c \ub2e4\ub8e8\uace0 \uc788\uc744\uae4c? \uc77c\ub2e8 \ub300\ubd80\ubd84\uc758 \ub370\uc774\ud130\ub4e4\uc740 \uce21\uc815 \ub2e8\uc704\ub97c \ud3ec\ud568\ud558\uace0<br \/>\n\uc788\uc9c0 \uc54a\ub2e4. \uc801\uc808\ud55c \ub2e8\uc704\ub294 \uc0ac\ub78c\uc774 \uc9c1\uc811 \uc720\ucd94\ud574\uc57c \ud558\uba70, \uc5ec\ub7ec \ub2e8\uc704\uac00 \ud63c\uc7ac\ud560 \ub54c \uc11c\ub85c \ud1b5\uc77c\ud558<br \/>\n\uac70\ub098 \ubcc0\ud658\ud558\ub294 \uc791\uc5c5\ub3c4 \uc0ac\ub78c\uc774 \ud574\uc57c \ud55c\ub2e4.<br \/>\nR\uc5d0\ub294 \uc774\ub7f0 \ubd88\ud3b8\ud568\uc744 \ud574\uc18c\ud558\uace0\uc790 \uc5ec\ub7ec \ud328\ud0a4\uc9c0\uac00 \uac1c\ubc1c\ub418\uc5b4 \uc788\ub2e4. \uc5ec\ub7ec \ud328\ud0a4\uc9c0\ub4e4 \uc911\uc5d0\uc11c<br \/>\n\ub300\ud45c\uc801\uc778 units \ud328\ud0a4\uc9c0\ub97c \uc18c\uac1c\ud574\ubcf4\uc790. units \ud328\ud0a4\uc9c0\ub97c \ud65c\uc6a9\ud558\uba74 \ub2e8\uc704 \ubcc0\ud658\uc744 \uc27d\uac8c \ud560 \uc218<br \/>\n\uc788\uc73c\uba70,<strong> plot() \ub610\ub294 ggplot() \uacb0\uacfc \uadf8\ub798\ud504\uc5d0 \ub2e8\uc704\uac00 \uc800\uc808\ub85c \ud3ec\ud568\ub41c\ub2e4.<\/strong><\/p>\n<blockquote>\n<pre># unix, sudo apt-get install libudunits2-dev\r\n# install.packages('units')\r\nlibrary(units)\r\nlibrary(dplyr)\r\ndata(mtcars)\r\nhelp(mtcars)<\/pre>\n<\/blockquote>\n<p>mtcars\uc5d0 \ub300\ud55c \ub3c4\uc6c0\ub9d0\uc744 \ubcf4\uc790. mpg\uc758 \ub2e8\uc704\ub294 miles per gallon(US)\uc774\uace0, disp\uc758 \ub2e8\uc704\ub294<br \/>\ncubic inch, hp\uc758 \ub2e8\uc704\ub294 Gross horsepower, wt\uc758 \ub2e8\uc704\ub294 1000 lbs(\ud30c\uc6b4\ub4dc), qsec\uc758<br \/>\n\ub2e8\uc704\ub294 1\/4 mile time(1\/4\ub9c8\uc77c\uc744 \uac00\ub294\uac8c \uac78\ub9ac\ub294 \ucd08) \uc784\uc744 \ud655\uc778\ud560 \uc218 \uc788\ub2e4. \ubaa8\ub450 \uc6b0\ub9ac\uac00<br \/>\n\uc27d\uac8c \uc811\ud560 \uc218 \uc5c6\ub294 \ub2e8\uc704\uc774\uae30 \ub54c\ubb38\uc5d0 \uadf8 \uc758\ubbf8\ub97c \ud655\uc778\ud558\uae30\uac00 \uc27d\uc9c0 \uc54a\ub2e4.<\/p>\n<p>(\uc911\ub7b5)<\/p>\n<p>mpg\ub294 \ud3ec\ud568\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc9c0\ub9cc, \uc6b0\ub9ac\uac00 \uc9c1\uc811 \uc815\ud574\uc904 \uc218 \uc788\ub2e4.<\/p>\n<blockquote>\n<pre># \ub2e4\uc74c\uc758 \ucf54\ub4dc\uc5d0\uc11c `name=`\uc5d0 \ub2e8\uc704\uc758 \uc774\ub984\uc744 \uc815\ud558\uace0, `def=`\ub85c \uc815\uc758\ub97c \uc801\ub294\ub2e4.\r\n# mpg\ub294 \ub9c8\uc77c(international_mile)\uc744 US \uc561\ub7c9 \uac24\ub860(US_liquid_gallon)\uc73c\ub85c \ub098\ub220\uc900 \ub2e8\uc704\uc774\ub2e4.\r\ninstall_unit(name = \"mpg_US\", def = \"international_mile \/ US_liquid_gallon\")\r\nunits(mtcars$mpg) = 'mpg_US' # mpg\uc758 \ub2e8\uc704\ub97c mpg_US\ub85c \uc815\ud55c\ub2e4.\r\nunits(mtcars$mpg) = 'km\/L' # mpg\uc758 \ub2e8\uc704\ub97c km\/L\ub85c \ubcc0\ud658\ud55c\ub2e4.\r\nunits(mtcars$wt) = 'kg'\r\n\r\nlibrary(ggplot2)\r\nlibrary(ggforce) # ggplot\uacfc units\ub97c \ud568\uaed8 \uc4f0\uae30 \uc704\ud574\uc11c \ud544\uc218!\r\nggplot(data = mtcars) + geom_histogram(aes(x=wt), bins=10)\r\nggplot(data = mtcars) + geom_point(aes(x=wt, y=mpg))<\/pre>\n<\/blockquote>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-2391\" src=\"http:\/\/ds.sumeun.org\/wp-content\/uploads\/2022\/01\/ggplot2_units.png\" alt=\"\" width=\"1050\" height=\"360\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>mpg\ub294 \uc27d\uac8c km\/L \ub2e8\uc704\ub85c \ubcc0\ud658\ub418\uc5c8\ub2e4!<\/p>\n<p>&nbsp;<\/p>\n<p>\ucd9c\ucc98&gt; R\ub85c \ud558\ub294 \ube45\ub370\uc774\ud130 \ubd84\uc11d: \ub370\uc774\ud130 \uc804\ucc98\ub9ac\uc640 \uc2dc\uac01\ud654<\/p>\n<p><img loading=\"lazy\" class=\"wp-image-2373 alignleft\" src=\"http:\/\/ds.sumeun.org\/wp-content\/uploads\/2022\/01\/\ud45c\uc9c0_\uc378\ub124\uc77c.png\" alt=\"\" width=\"108\" height=\"154\" \/> <a href=\"https:\/\/www.aladin.co.kr\/shop\/wproduct.aspx?ItemId=286608049\">\u00a0\uc54c\ub77c\ub518<\/a><\/p>\n<p><a href=\"http:\/\/www.yes24.com\/Product\/Goods\/106156560\">\uc608\uc2a424<\/a><\/p>\n<p><a href=\"http:\/\/www.kyobobook.co.kr\/product\/detailViewKor.laf?ejkGb=KOR&amp;mallGb=KOR&amp;barcode=9791196014445&amp;orderClick=LAG&amp;Kc=\">\uad50\ubcf4\ubb38\uace0<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc774 \ucc45\uc5d0\uc11c \uc790\uc8fc \uc0ac\uc6a9\ud55c \ub370\uc774\ud130 mtcars\uc5d0\ub294 mpg\uc5f4\uc774 \uc788\ub2e4. \uc5ec\uae30\uc11c mpg\ub294 miles per gallon \uc744 \uc758\ubbf8\ud55c\ub2e4. \ub9c8\uc77c(mile)\uacfc \uac24\ub7f0(gallon)\uc740 \uae38\uc774\uc640 \ubd80\ud53c\ub97c \uce21\uc815\ud558\uae30 \uc704\ud574 \uc601\ubbf8\uad6d\uac00\uc5d0\uc11c \uc0ac\uc6a9\ud558\ub294 \ub2e8\uc704\uc774\ub2e4. mpg \uc5f4\uc740 1 \ub9c8\uc77c(\uc57d 1.6 km)\ub97c \uac00\uae30 \uc704\ud574 \ud544\uc694\ud55c \uc11d\uc720\uc758 \ubd80\ud53c\ub97c \uac24\ub7f0 (\uc57d 3.7 L) \ub2e8\uc704\ub85c \uce21\uc815\ud55c \uc5f0\ube44 \ub2e8\uc704\uc774\ub2e4. \ud558\uc9c0\ub9cc \ub9c8\uc77c\uacfc \uac24\ub7f0\uc740 \uc6b0\ub9ac\uc5d0\uac8c \uc0dd\uc18c\ud558\ub2e4. \uc6b0\ub9ac\ub294 \uae38\uc774\uc640 \ubd80\ud53c\ub97c \uce21\uc815\ud560 \ub54c \uad6d\uc81c \ud45c\uc900 [&hellip;]<\/p>\n","protected":false},"author":3225,"featured_media":2391,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"jetpack_featured_media_url":"http:\/\/ds.sumeun.org\/wp-content\/uploads\/2022\/01\/ggplot2_units.png","_links":{"self":[{"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/posts\/2390"}],"collection":[{"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/users\/3225"}],"replies":[{"embeddable":true,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2390"}],"version-history":[{"count":5,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/posts\/2390\/revisions"}],"predecessor-version":[{"id":2396,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/posts\/2390\/revisions\/2396"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=\/wp\/v2\/media\/2391"}],"wp:attachment":[{"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2390"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ds.sumeun.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}