{"id":4408,"date":"2022-08-10T08:25:52","date_gmt":"2022-08-10T08:25:52","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=4408"},"modified":"2022-08-10T08:26:43","modified_gmt":"2022-08-10T08:26:43","slug":"numpy-transpose","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-numpy\/numpy-transpose\/","title":{"rendered":"NumPy transpose()"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the numpy <code>transpose()<\/code> function to reverse the axes of an array.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-numpy-transpose-function'>Introduction to the numpy transpose() function <a href=\"#introduction-to-the-numpy-transpose-function\" class=\"anchor\" id=\"introduction-to-the-numpy-transpose-function\" title=\"Anchor for Introduction to the numpy transpose() function\">#<\/a><\/h2>\n\n\n\n<p>The numpy <code><code>transpose()<\/code><\/code> function reverses the axes of an <a href=\"https:\/\/www.pythontutorial.net\/python-numpy\/create-numpy-array\/\">array<\/a>. Here&#8217;s the syntax of the <code><code>transpose()<\/code><\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">numpy.transpose(a, axes=<span class=\"hljs-literal\">None<\/span>)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>a is an input array. It can be a numpy array or any object that can be converted to a numpy array.<\/li><li>axes is a tuple or a list that contains a permutation of [0,1,..,N-1] where N is the number of axes of the array a.<\/li><\/ul>\n\n\n\n<p>The <code>transpose()<\/code> function returns the array <code>a<\/code> with its axes permuted. <\/p>\n\n\n\n<p>The <code>transpose()<\/code> function is equivalent to:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>ndarray.T<\/code> property method that returns an array transposed.<\/li><li><code>ndarray.transpose(*axes)<\/code> method that returns an array transposed.<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='numpy-transpose-function-examples'>NumPy transpose() function examples <a href=\"#numpy-transpose-function-examples\" class=\"anchor\" id=\"numpy-transpose-function-examples\" title=\"Anchor for NumPy transpose() function examples\">#<\/a><\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the <code>transpose()<\/code> function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='1-using-transpose-function-with-1-d-array-example'>1) Using transpose() function with 1-D array example <a href=\"#1-using-transpose-function-with-1-d-array-example\" class=\"anchor\" id=\"1-using-transpose-function-with-1-d-array-example\" title=\"Anchor for 1) Using transpose() function with 1-D array example\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>transpose()<\/code> function with 1-D array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> numpy <span class=\"hljs-keyword\">as<\/span> np\n\na = np.array(&#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>])\nb = np.transpose(a)\nprint(b)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">&#91;<span class=\"hljs-number\">1<\/span> <span class=\"hljs-number\">2<\/span> <span class=\"hljs-number\">3<\/span>]<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>transpose()<\/code> function has no effect on a 1-D array because a transposed vector is simply the same vector.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='2-using-numpy-transpose-function-with-2-d-array-example'>2) Using numpy transpose() function with 2-D array example <a href=\"#2-using-numpy-transpose-function-with-2-d-array-example\" class=\"anchor\" id=\"2-using-numpy-transpose-function-with-2-d-array-example\" title=\"Anchor for 2) Using numpy transpose() function with 2-D array example\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>transpose()<\/code> function to transpose a 2-D array (or a matrix):<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> numpy <span class=\"hljs-keyword\">as<\/span> np\n\na = np.array(&#91;\n    &#91;<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>],\n    &#91;<span class=\"hljs-number\">4<\/span>, <span class=\"hljs-number\">5<\/span>, <span class=\"hljs-number\">6<\/span>]\n])\n\nb = np.transpose(a)\nprint(b)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">&#91;&#91;<span class=\"hljs-number\">1<\/span> <span class=\"hljs-number\">4<\/span>]\n &#91;<span class=\"hljs-number\">2<\/span> <span class=\"hljs-number\">5<\/span>]\n &#91;<span class=\"hljs-number\">3<\/span> <span class=\"hljs-number\">6<\/span>]]<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.pythontutorial.net\/wp-content\/uploads\/2022\/08\/numpy-transpose.svg\" alt=\"numpy transpose\" class=\"wp-image-4410\"\/><\/figure>\n\n\n\n<p>In this example, the <code>transpose()<\/code> function transpose a (2,3) array. Basically, it swaps rows and columns of the array. <\/p>\n\n\n\n<p>After the transposition, the first row of array a becomes the first column of the transposed array b, the second row of array a becomes the second column of the transposed array b.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Use the <code>transpose()<\/code> to transpose an array.<\/li><\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful ?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"4408\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pythontutorial.net\/python-numpy\/numpy-transpose\/\"\n\t\t\t\tdata-post-title=\"NumPy transpose()\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"4408\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pythontutorial.net\/python-numpy\/numpy-transpose\/\"\n\t\t\t\tdata-post-title=\"NumPy transpose()\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\t\t\t<input type=\"button\" name=\"wth-submit\" class=\"wth-btn wth-btn-submit\" id=\"wth-submit\" \/>\n\t\t\t<input type=\"button\" class=\"wth-btn wth-btn-cancel\" value=\"Cancel\" \/>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Summary: in this tutorial, you&#8217;ll learn how to use the numpy transpose() function to reverse the axes of an array. Introduction to the numpy transpose() function # The numpy transpose() function reverses the axes of an array. Here&#8217;s the syntax of the transpose() function: In this syntax: a is an input array. It can be [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3406,"menu_order":21,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4408","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/4408","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/comments?post=4408"}],"version-history":[{"count":0,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/4408\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/pages\/3406"}],"wp:attachment":[{"href":"https:\/\/www.pythontutorial.net\/wp-json\/wp\/v2\/media?parent=4408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}