{"kind":"task","effective_mode":"full","benchmark":{"kind":"benchmark","effective_mode":"full","slug":"ds-1000","formal_name":"DS-1000","introduction":"DS-1000 builds 1,000 data-science problems from real StackOverflow questions across seven libraries including NumPy, Pandas and Matplotlib. The problems are perturbed so that recalling the original answer does not solve them.","introduction_ja":"","introduction_en":"","category":"Category not supplied","task_count":null,"acquisition_status":"Acquisition status not supplied","official_url":"https://ds1000-code-gen.github.io/","indexing_mode":"index","profile":{"resources":[],"task_format":"","scoring":"","metric":"","size":"","answer_access":"","license":"","citation":"","maintainer":"","released":"","why_hard":"","related":[],"history":"","construction":"","limitations":"","saturation":"","scores":[]}},"task_id":"4a33c5ed-0672-52db-ab18-a415f7874ca7","task_key":"default--test--304","task_revision_id":"1","upstream_id":"304","short_description":"I want to reverse & convert a 1-dimensional array into a 2-dimensional array by…","config":"default","split":"test","body":"{\"library\":\"Numpy\",\"prompt\":\"Problem:\\nI want to reverse & convert a 1-dimensional array into a 2-dimensional array by specifying the number of columns in the 2D array. Something that would work like this:\\n> import numpy as np\\n> A = np.array([1,2,3,4,5,6,7])\\n> B = vec2matrix(A,ncol=2)\\n> B\\narray([[7, 6],\\n       [5, 4],\\n       [3, 2]])\\nNote that when A cannot be reshaped into a 2D array, we tend to discard elements which are at the beginning of A.\\nDoes numpy have a function that works like my made-up function \\\"vec2matrix\\\"? (I understand that you can index a 1D array like a 2D array, but that isn't an option in the code I have - I need to make this conversion.)\\nA:\\n<code>\\nimport numpy as np\\nA = np.array([1,2,3,4,5,6,7])\\nncol = 2\\n</code>\\nB = ... # put solution in this variable\\nBEGIN SOLUTION\\n<code>\\n\"}","display_format":"code","language":"","answer_status":"published","assets":[],"source_url":"https://ds1000-code-gen.github.io/","history":"initial import","indexing_mode":"index","subproblems":[],"grids":[]}