WebManipulating Lists by Their Indices Manipulating Elements of Lists Grouping and Combining Elements of Lists Adding, Removing, and Modifying List Elements Nested Lists Rearranging Nested Lists Vectors and Matrices Operations on Scalars, Vectors, and Matrices Functional Operations How to: Do Linear Algebra List Manipulation Elements of … WebFiltering elements from a list. I want to make a new list that only contains the entries for which the first component of each pair does not repeat itself. So for example, the element. would be eliminated since 2 appears in the first component of both {2,1} and {2,4}. Likewise, { {2, 1}, {2, 4}, {3, 1}} will also be eliminated.
list - 結合 X、Y、Z 坐標的 Mathematica 列表 - 堆棧內存溢出
WebGive a number which shows how many times point1 from List1 satisfies the criteria. In order to clarify the problem : first element of List1 includes two points : { {4, -1}, {5, -2}} point1 = {4, -1} and point2 = {5, -2}. x1 = 4 < x2 = 5 and y1 = -1 > y2 = -2. So point {5, -2} dominates point {4, -1} : ( 5>4 and -2<-1 ) WebMar 29, 2011 · You can filter with this: Cases [lst, { (1 0) ..}] Or get the complement with either: Cases [lst, Except @ { (1 0) ..} ] or: DeleteCases [lst, { (1 0) ..}] Share Improve this answer Follow answered Mar 29, 2011 at 20:03 Mr.Wizard 24.1k 5 43 121 Add a comment 5 This is a nice application for some/every: 300 比索
Select [nested_list, condition] in Mathematica - Stack Overflow
WebList Manipulation. Lists are central constructs in the Wolfram Language, used to represent collections, arrays, sets, and sequences of all kinds. Lists can have any structure and size and can routinely involve even millions of elements. Well over a thousand built-in functions throughout the Wolfram Language operate directly on lists, making ... Apply operates on SparseArray objects and structured arrays just as it would on the … Partition [list, {n 1, n 2, …, n r}] effectively replaces blocks of elements at level r in … The Wolfram Language represents vectors as lists, and never needs to distinguish … WebJul 14, 2015 · 2. This one should work: Select [words, Or @@ (MemberQ [wordsselect, #] & /@ # [ [1]]) &] It checks for each one of the words in the first list-element. If there is at least one word in the wordsselect list then the whole element is selected. With MemberQ [# [ [1]], wordsselect ] & you are checking if the list wordsselect is inside each {"wordX ... WebApply Apply. Apply. f@@ expr or Apply [ f, expr] replaces the head of expr by f. Apply [ f, expr, levelspec] replaces heads in parts of expr specified by levelspec. Apply [ f] represents an operator form of Apply that can be applied to an expression. 3000円 手土産