vectorization

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Double summation with vectorized loops in Matlab

I want to vectorize this double for loop because it is a bottleneck in my code. Since Matlab is a based-one indexing language I have to create an additionalterm for M = 0.[详细]

2023-03-09 02:57 分类：问答
Why is vectorization beneficial for Matlab programs? Is it the same for NumPy and Boost(uBLAS)?

Using vectorization to replace for-loops may increase Matlab programs\' speed significantly. Is it because the vectorized codes are runned in parallel?[详细]

2023-03-05 23:57 分类：问答
loop to create a new variable based on other cases in R (very basic)

I have a dataframe with three variables: ID, group, and nominated_ID. I want to know the group开发者_StackOverflow社区 that nominated_ID belongs in.[详细]

2023-03-04 20:07 分类：问答
What is meant by too many BB's in loop, can't vectorize?

In short, the situation is this: I have been trying to compile a C code with option gcc -O2 -ftree-vectorize -msse4 -ftree-vectorizer-verbose=10 -march=core2 -g -c. For certain nested for-loop constru[详细]

2023-03-03 19:06 分类：问答
MATLAB vectorize nested for loop

Hi I am struggling with matlab vactorization any help on this would be great thanks. oldLocation, Limit_ are both matrices[详细]

2023-03-02 18:08 分类：问答
matlab: addressing of one index without sub2ind

This is very closely related to this other question, but that question wanted to avoid sub2ind because of performance concerns. I am more concerned about the \"unelegance\" of using sub2ind.[详细]

2023-03-02 15:49 分类：问答
Python - how to write this in vector form [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help clari[详细]

2023-02-26 19:30 分类：问答
Speed up `for` loops or vectorizing them

I have write some code but my program is too slo开发者_JAVA技巧w. The problem is as follows: I\'ll build Matrix \"A\" to solve Ax=b problem[详细]

2023-02-25 21:48 分类：问答
What is the easiest way to parallelize a vectorized function in R?

I have a very large list X and a vectorized function f. I want to calculate f(X), but this will take a long time if I do it with a single core. I have (access to) a 48-core server. 开发者_如何学CWhat[详细]

2023-02-22 19:12 分类：问答
Is there an R function for finding the index of an element in a vector?

In R, I have an element x and a vector v. I want to find the first index of an element in v that is equal to x. I know that one way to do this is: which(x == v)[[1]], but that seems excessively ineffi[详细]

2023-02-22 12:17 分类：问答