{"id":144648,"date":"2025-03-28T11:16:38","date_gmt":"2025-03-28T05:46:38","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=144648"},"modified":"2025-03-28T11:16:38","modified_gmt":"2025-03-28T05:46:38","slug":"numpy-joining-array","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/","title":{"rendered":"NumPy Joining Array"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\"># How to merge two array\r\n# concatenate(),stack(),hstack(),vstack()\r\nimport numpy as np\r\nar1=np.array([[1,2,3],[4,5,6],[7,8,9]])\r\nar2=np.array([[10,20,30],[40,50,60],[70,80,90]])\r\n# vstack()  concatenate( axis=0)\r\n\r\nprint(\"AR1 Shape: \",ar1.shape)\r\nprint(\"AR2 Shape: \",ar2.shape)\r\nprint(ar1)\r\nprint()\r\nprint(ar2)\r\nar3=np.vstack((ar1,ar2)) \r\nprint(ar3)\r\nprint(\"AR3 Shape: \",ar3.shape)\r\n\r\n# # hstack()  concatenate( axis=1)\r\n\r\n# print(\"AR1 Shape: \",ar1.shape)\r\n# print(\"AR2 Shape: \",ar2.shape)\r\n# print(ar1)\r\n# print()\r\n# print(ar2)\r\n# ar3=np.hstack((ar1,ar2)) \r\n# print(ar3)\r\n# print(\"AR3 Shape: \",ar3.shape)\r\n\r\n#stack ()\r\n# print(\"AR1 Shape: \",ar1.shape)\r\n# print(\"AR2 Shape: \",ar2.shape)\r\n# print(ar1)\r\n# print()\r\n# print(ar2)\r\n# ar3=np.stack((ar1,ar2),axis=1) # 0-col 1-row\r\n# print(\"AR3 Shape: \",ar3.shape)\r\n# print(ar3)\r\n\r\n\r\n# concatenate()\r\n# print(ar1.shape)\r\n# print(ar2.shape)\r\n# print(ar1)\r\n# print()\r\n# print(ar2)\r\n# print()\r\n# #ar3=np.concatenate((ar1,ar2),axis=0) # 0-column 1-axis\r\n# ar3=np.concatenate((ar1,ar2),axis=1) # 0-column 1-axis\r\n# print(ar3)\r\n# print(ar3.shape)<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 # How to merge two array # concatenate(),stack(),hstack(),vstack() import numpy as np ar1=np.array([[1,2,3],[4,5,6],[7,8,9]]) ar2=np.array([[10,20,30],[40,50,60],[70,80,90]]) # vstack() concatenate( axis=0) print(&#8220;AR1 Shape: &#8220;,ar1.shape) print(&#8220;AR2 Shape: &#8220;,ar2.shape) print(ar1) print() print(ar2) ar3=np.vstack((ar1,ar2)) print(ar3) print(&#8220;AR3 Shape: &#8220;,ar3.shape)&#46;&#46;&#46;<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22401],"tags":[33914,33913,9170,33912,33911,31785,31784,9175],"class_list":["post-144648","post","type-post","status-publish","format-standard","hentry","category-numpy","tag-concat-numpy-array","tag-how-to-merge-numpy-array","tag-numpy","tag-numpy-concatenate-array","tag-numpy-joining-array","tag-numpy-practical","tag-numpy-program","tag-numpy-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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DataFlair","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/","og_locale":"en_US","og_type":"article","og_title":"NumPy Joining Array - DataFlair","og_description":"Program 1 # How to merge two array # concatenate(),stack(),hstack(),vstack() import numpy as np ar1=np.array([[1,2,3],[4,5,6],[7,8,9]]) ar2=np.array([[10,20,30],[40,50,60],[70,80,90]]) # vstack() concatenate( axis=0) print(\"AR1 Shape: \",ar1.shape) print(\"AR2 Shape: \",ar2.shape) print(ar1) print() print(ar2) ar3=np.vstack((ar1,ar2)) print(ar3) print(\"AR3 Shape: \",ar3.shape)&#46;&#46;&#46;","og_url":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/","og_site_name":"DataFlair","article_publisher":"https:\/\/www.facebook.com\/DataFlairWS\/","article_published_time":"2025-03-28T05:46:38+00:00","author":"DataFlair Team","twitter_card":"summary_large_image","twitter_creator":"@DataFlairWS","twitter_site":"@DataFlairWS","twitter_misc":{"Written by":"DataFlair Team","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/#article","isPartOf":{"@id":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/"},"author":{"name":"DataFlair Team","@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/person\/c187795dc82ab948373cca526df7c445"},"headline":"NumPy Joining Array","datePublished":"2025-03-28T05:46:38+00:00","mainEntityOfPage":{"@id":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/"},"wordCount":5,"commentCount":0,"publisher":{"@id":"https:\/\/data-flair.training\/blogs\/#organization"},"keywords":["concat numpy array","how to merge numpy array","Numpy","numpy concatenate array","numpy joining array","numpy practical","numpy program","NumPy Tutorial"],"articleSection":["NumPy Tutorials"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/data-flair.training\/blogs\/numpy-joining-array\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/","url":"https:\/\/data-flair.training\/blogs\/numpy-joining-array\/","name":"NumPy Joining Array - 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