Get indices in a vector that are 0

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WebApr 27, 2024 · Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: . Switzerland (English) Webyou can get the sorted list and indicies by using zip: sorted_items, sorted_inds = zip (*sorted ( [ (i,e) for i,e in enumerate (my_list)], key=itemgetter (1))) – Charles L. Nov 30, 2015 at 2:58 2 @RomanBodnarchuk this doesn't work, x = [3,1,2]; numpy.argsort (x) yields [1,2,0]. – shahar_m May 14, 2024 at 8:50

C++ : How to get element by index in vector at() vs operator []

WebSep 19, 2014 · In Matlab I can find all non zero entries in a vector like this: >> v = [0 1 0 0 1] v = 0 1 0 0 1 >> indices = find (v) indices = 2 5 Assuming that my vector v can only have 0 and 1 values, what is a simple way to reproduce v from the indices vector? matlab indexing Share Improve this question Follow edited Sep 19, 2014 at 10:25 Dan WebWhen you execute find with a relational operation like X>1, it is important to remember that the result of the relational operation is a logical matrix of ones and zeros. For example, the command [row,col,v] = find (X>1) returns a column vector of logical 1 ( true ) values for v. The substring wood occurs at indices 10 and 23 in the first character vector and … Lia = ismember(A,B,'rows') treats each row of A and each row of B as single entities … If A is a vector, then max(A) returns the maximum of A.. If A is a matrix, then … plastcure rigid 10500

Why do vector indices in R start with 1, instead of 0?

WebDec 5, 2012 · import numpy as np # Create your array a = np.arange (1, 10) # a = array ( [1, 2, 3, 4, 5, 6, 7, 8, 9]) # Get the indexes/indices of elements greater than 4 idx = np.where (a > 4) [0] # idx = array ( [4, 5, 6, 7, 8]) # Get the elements of the array that are greater than 4 elts = a [a > 4] # elts = array ( [5, 6, 7, 8, 9]) # Convert idx (or elts) … WebThe indices can be used as an index into an array. >>> x = np.arange(20).reshape(5, 4) >>> row, col = np.indices( (2, 3)) >>> x[row, col] array ( [ [0, 1, 2], [4, 5, 6]]) Note that it … WebApr 2, 2011 · The linear index of each element is shown in the upper left. From the diagram you can see that A(14) is the same as A(2,4). The single subscript can be a vector containing more than one linear index, as in: A([6 12 15]) ans = 11 15 12 Consider again the problem of extracting just the (2,1), (3,2), and (4,4) elements of A. plastcover til lp

Extracting certain indices from a numpy matrix - Stack Overflow

WebIn vector elements are indexed from 0 to size() – 1. To access any element in vector by index vector provides two member functions i.e. at() operator[] Let’s discuss them in … WebDec 29, 2024 · If 3 is a value then B(5) > 3 so either 5 or B(5)=4 could make sense as a higher value than 3. But this is not the same decision as for the A 4 case: If you are looking for the first element in the vector that is greater than the given value, then for A you would expect to return the information corresponding to the value 5. plastci cintainers red lidsWebFeb 25, 2014 · If I have a row vector,what command allows me to find the indexes that exceed a certain value that I want as a threshold. For example: A =. Theme. Copy. … plastcraft scenery

"WebMar 23, 2024 · 1. Although correct and intuitive, using this paradigm inside a for-loop iterator is notorious for difficult to understand errors in the situation where the length of a (missing or misspelled) vector is 0. Instead of returning a missing value, it returns c (1,0). – IRTFM. Mar 23, 2024 at 20:58. " - Get indices in a vector that are 0

Get indices in a vector that are 0

Getting the indices from a vector - MATLAB Cody

WebMar 28, 2024 · For floating point tensors, I use this to get the index of the element in the tensor.. print((torch.abs((torch.max(your_tensor).item()-your_tensor))<0.0001).nonzero()) Here I want to get the index of max_value in the float tensor, you can also put your value like this to get the index of any elements in tensor. WebJun 8, 2024 · Video. which () function in R Language is used to return the indices of the object which return true for the logical operation passed as argument. Syntax: which (x, arr.ind) Parameters: x: logical object. arr.ind: Boolean value to display indices. Example 1: x <- matrix (1:9, 3, 3) x.

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WebJul 15, 2015 · The direct access model[word] is deprecated and will be removed in Gensim 4.0.0 in order to separate the training and the embedding. The command should be replaced with, simply, model.wv[word]. Using Gensim in Python, after vocabs are built and the model trained, you can find the word count and sampling information already mapped in … WebAug 1, 2024 · I want to get the indices of similar values in a vector. For example, I have a vector x=[1 1 2 2 3]. The output should be something like this: indices = 1,2 & 3,4 1 Comment. Show Hide None. ... (0) I have the same question (0) Accepted Answer . Rob Campbell on 1 Aug 2024. Vote. 1. Link.

WebSep 22, 2012 · With a byte array that is mostly zero, being a sparse array, you can take advantage of a 32 bit CPU by doing comparisons 4 bytes at a time. The actual comparisons are done 4 bytes at a time however if any of the bytes are non-zero then you have to determine which of the bytes in the unsigned long are non-zero so that will take more effort. WebI am looking for a condition which will return the index of a vector satisfying a condition. For example- I have a vector b = c (0.1, 0.2, 0.7, 0.9) I want to know the first index of b for which say b >0.65. In this case the answer should be 3 I tried which.min (subset (b, b > 0.65)) But this gives me 1 instead of 3. Please help r Share

WebMay 17, 2024 · Method 1: Using for loop. A for loop iteration can be performed over the rows and columns to access the cell values contained in a matrix. Every element is checked for non-zero value, and if satisfies the constraint, the corresponding cell indices are displayed. The time complexity required is equivalent to O (n * m), where n is the number of ... WebYes, we can find the index of an element in a vector as follows: > a <- c (3, 2, -7, -3, 5, 2) > b <- (a==-7) # this will output a TRUE/FALSE vector > c <- which (a==-7) # this will give you numerical value > a [1] 3 2 -7 -3 5 2 > b [1] FALSE FALSE TRUE FALSE FALSE FALSE > c …

WebNov 10, 2024 · So, I give you two possible solutions. 1) Without OpenCV. First, you must know that. std::vector::iterator nn = find (index.begin (), index.end (), 255); Will only give you the first occurrance. Knowing this, here is a way you could check if the label is inside the _classes vector.

WebUse the find function to get the index of the element equal to 8 that satisfies the conditions. find (A<9 & ~mod (A,2) & A~=2) ans = 14 The result indicates that A (14) = 8. Replace Values That Meet a Condition Sometimes it is useful to simultaneously change the values of several existing array elements. plastech driffieldWebJun 12, 2024 · You get a vector, because those are the indices of elements that you wanted -- only the indices you wanted. Arrays need to be rectangular, without holes. With that restriction, you'll have to decide what you want to fill all the area where there are elements you didn't want. It could be zero, NaN, etc. ... (0) Accepted Answer . plasteak flooring for boatsWebAug 24, 2011 · x(:) % getting all the elements. :note:`you get a column vector.` ans = 0 0.3491 0.6981 1.0472 1.3963 1.7453 2.0944 2.4435 2.7925 3.1416 finding part of vector. suppose we want the part of the vector where x > 2. We could do that by inspection, but there is a better way. plastech courtemanche plastech control systemsWebJan 1, 2024 · ind = 2x3 logical array 0 1 1 0 1 0. Now that you know the locations of the elements meeting the condition, you can inspect the individual values using ind as the … plastech china co ltdWebMay 8, 2013 · hh is a vector of numeric values, so hh(tau) would be an attempt to index that vector at location given by tau . In order for that to be valid, tau would have to be positive integers. Q = integral ... the same as the corresponding literal value you would expect. 0.1+0.1+0.1 does not give you the same value as you would get from writing 0.3; plaste forceWebA common use for nonzero is to find the indices of an array, where a condition is True. Given an array a, the condition a > 3 is a boolean array and since False is interpreted as … plastech ducting