vec | Small , header-only , cross-platform SIMD vector library
kandi X-RAY | vec Summary
kandi X-RAY | vec Summary
A small, header-only, cross-platform SIMD vector library for C11. Provides an abstraction of 128-bit vectors divided into four 32-bit elements, which can be floating or integer. Does this using a clever union type. Oriented mainly towards 3D graphics, but can be used for any type of 32×4 bit vector.
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Lines of Code : 20License : Non-SPDX (Apache License 2.0)
Copydef _unblockify_then_matricize(self, vec):
"""Flatten the block dimensions then reshape to a batch matrix."""
# Suppose
# vec.shape = [v0, v1, v2, v3],
# self.block_depth = 2.
# Then
# leading shape = [v0, v1]
# bl def _BroadcastMul(vec, mat):
"""Multiply after broadcasting vec to match dimensions of mat.
Args:
vec: A 1-D tensor of dimension [D0]
mat: A 2-D tensor of dimension [D0, D1]
Returns:
A tensor of dimension [D0, D1], the result of v Community Discussions
Trending Discussions on vec
QUESTION
I have a simple code where I try to define a vector as one of two initializer lists using a ternary operator:
...ANSWER
Answered 2021-Jun-15 at 21:48Because you can't have braces in that context. If you look at cppreference on list initialization, you see that the case inside a ternary operator isn't defined. So it can't be parsed correctly and you get the error you have.
You'd have to use something like this :
QUESTION
I was wondering if i could return a Vec<&str> type from to_lowercase() below?
Here is my code:
...ANSWER
Answered 2021-Jun-15 at 11:42This is not possible. The reason is that converting a Unicode String to lowercase/uppercase may need to reallocate the String, as case folding within Unicode might need more/fewer characters and/or bytes to encode the folded variant.
Either you can return a Vec, where the new String holds the conversion. Or, if you are sure that your input is pure ASCII, you take use make_ascii_lowercase to do the conversion in-place; this has the downside that if proper Unicode folding requires more/less characters/bytes, no folding takes place.
QUESTION
I'm implementing a simple task queue using redis in Rust, but am struggling to deserialize the returned values from redis into my custom types.
In total I thought of 3 approches:
- Deserializing using serde-redis
- Manually implementing the
FromRedisValuetrait - Serializing to String using serde-json > sending as string > then deserializing from string
The 3rd approach worked but feels artificial. I'd like to figure out either 1 or 2, both of which I'm failing at.
Approach 1 - serde-redisI have a simple Task definition:
...ANSWER
Answered 2021-Jun-15 at 09:55Redis doesn't define structured serialization formats. It mostly store strings and integers. So you have to choose or define your format for your struct.
A popular one is JSON, as you noticed, but if you just want to (de)serialize simple pairs of (id, description), it's not very readable nor convenient.
In such a case, you can define your own format, for example the id and the description with a dash in between:
QUESTION
I'm working on a system in Core to save the transforms of furniture, specifically position and rotation, which are both Vector3's. I have these in player storage, so at some point to save all the player's furniture, I think I will end up maxing out player storage. So I'm converting all the Vector3's to strings, with a modified version of a Roblox script that I found:
...ANSWER
Answered 2021-Mar-03 at 03:23Most likely the Vector3 format is more efficient than a string conversion for storage. Each number in the Vector3 requires 4 bytes to be stored because each number is a 16-bit float. By converting the Vector3 values to strings, additional bytes are required (each digit you add requires one byte since a character requires one byte). If you need to store a Vector3 as a string I would suggest using the method below.
For anyone who would like to learn how computers can store such a wide range of numbers in only four bytes, I would highly recommend researching the IEEE 754 format.
Video that explains the IEEE754 Format
You can use the string.pack and string.unpack functions to convert floats to byte arrays which can be sent as strings. This method will only require 12 bytes (12 characters) in total when sending data and has around 5 to 6 decimals points of precision. While this method may only save a few bytes it will allow you to send/save far more precise numbers/positions.
QUESTION
Is there an elegant way in C++ 11 to get the item from a std::vector of doubles which is closest to a certain value?
Code:
...ANSWER
Answered 2021-Jun-15 at 05:58You could use std::partition_point, std::lower_bound or std::upper_bound on the sorted range.
Example:
QUESTION
I made a custom allocator, but my code didn't compile on msvc and I'm not sure if my implementation satisfies the Allocator requirement (disregarding actual behavior of function implementations here). Here is a minimal example that reproduces the error on Visual Studio (16.11 P1 and 16.10):
...ANSWER
Answered 2021-Jun-14 at 18:11It does not.
An allocator rebound to a different value type must be constructible from the original allocator - this is the A a(b) row in the requirements you linked.
Your type fails that requirement.
QUESTION
I have two data frames. df1 and df2. both with c columns
using a clustering method, I ended up with 10 clusters. same clusters for each df is true. this means for example the 4th row of both df s go to the same cluster.
I added a cluster column to both dfs, showing the assigned cluster for each row.
I want to create a list.
this list contains 10 matrices, such that.
matrix 1, is a 2*c matrix. its first row is obtained by colmeans of those rows of df1 which are in cluster 1. and its 2nd row is obtained by colmeans of those rows of df2 which are in cluster 1.
and matrix 2 , colmeans of cluster 2 and so on.
this is what I ve done. but I get the 10th matrix only and not a list of matrices 1 to 10.
I would appreciate any help with this.
ANSWER
Answered 2021-Jun-14 at 17:39The Mean.list should be initialized outside the loop and it can be a NULL list of length k
QUESTION
I know I can create an array in R like this:
...ANSWER
Answered 2021-Jun-14 at 03:23You can try -
QUESTION
I want to create an object, and during initialisation choose a function to perform some calculation. For a polynomial of order N, some function has to be called, defined as someFunN. Now I am able to do this with a function pointer. I do this by a huge if block in the constructor,
ANSWER
Answered 2021-Jun-14 at 16:03You're probably looking for a lookup table:
QUESTION
template
struct Vec {
Vec() = default;
};
auto build_vec(unsigned int size) {
return Vec();
}
int main() {
auto vec = build_vec(5);
return 0;
}
ANSWER
Answered 2021-Jun-14 at 10:24No, this is not possible. A functions parameter is not known at compile time. The common way to signal that size must be known at compile time is to make the function a template and size a template parameter:
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