Dimensional | Swift matrices with friendly semantics | Math library
kandi X-RAY | Dimensional Summary
kandi X-RAY | Dimensional Summary
Dimensional defines a generic type Matrix that is parameterized by the type of element it holds. Note that matrices can be initialized from 2-dimensional array literals, and that each inner-array represents a row in the constructed Matrix.
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QUESTION
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I'm working on an algo dealing with a multi-dimensional array. If there is a zero, then the elements of the same column, but following arrays will also equal zero. I want to be able to sum the items that are not zeroed out.
ANSWER
Answered 2021-Jun-15 at 17:18Try this code
QUESTION
So let us say that we have a 2 dimensional list of numbers:
...ANSWER
Answered 2021-Jun-15 at 16:51Would something like this work?
QUESTION
I have a two dimensional numpy arrays which describes a list of coordinates where something happens. There are two events on the scene and I would like to calculate where those two are. But I do have difficulties to distinguish those two since there isn't any good pattern from event to event.
Example:
...ANSWER
Answered 2021-Jun-15 at 13:53There are all manner of clustering algorithms and many are implemented in scikit-learn.cluster. They are well documented and the docs have nice examples, but the various algorithms have trade-offs which can take a while to figure out. For example if you have a general idea about how spaced the clusters are (reflected in the eps
ilon parameter) you can get good results with DBSCAN:
QUESTION
I am solving this problem on dynamic array in which input first line contains two space-separated integers,n, the size of arr to create, and q, the number of queries, respectively.
Each of the q subsequent lines contains a query string,queries[i]
. it expects to return int[]
: the results of each type 2 query in the order they are presented.
i tried to attempt as below and my code seems fine to me but it gives segmentation fault error. please help me where I am getting conceptually wrong. thanks.
problem: Declare a 2-dimensional array,arr
, of n
empty arrays. All arrays are zero indexed.
Declare an integer,last answer , and initialize it to zero
.
There are 2
types of queries
, given as an array of strings for you to parse:
Query: 1 x y
Let idx=((queries[i][1]^last_answer)%n);
.
Append the integer y to arr[idx]
.
Query: 2 x y
Let idx=((queries[i][1]^last_answer)%n);
.
Assign last_answer=arr[idx][queries[i][2]%(arr[idx].size())]
.
Store the new value of last_answer
to an answers array.
input: 2 5
1 0 5
1 1 7
1 0 3
2 1 0
2 1 1
output:
7
3
...ANSWER
Answered 2021-Jun-15 at 11:25You are accessing elements of vector
without allocating them.
resize()
is useful to allocate elements.
QUESTION
I am trying to make a next-word prediction model with LSTM + Mixture Density Network Based on this implementation(https://www.katnoria.com/mdn/).
Input: 300-dimensional word vectors*window size(5) and 21-dimensional array(c) representing topic distribution of the document, used to train hidden initial states.
Output: mixing coefficient*num_gaussians, variance*num_gaussians, mean*num_gaussians*300(vector size)
x.shape, y.shape, c.shape with an experimental 161 obserbations gives me such:
(TensorShape([161, 5, 300]), TensorShape([161, 300]), TensorShape([161, 21]))
...ANSWER
Answered 2021-Jun-14 at 19:07for MDN model , the likelihood for each sample has to be calculated with all the Gaussians pdf , to do that I think you have to reshape your matrices ( y_true and mu) and take advantage of the broadcasting operation by adding 1 as the last dimension . e.g:
QUESTION
I want to change all specific values in a 3D Ndarray image file.
I'm working on mapping a colormap to an image file.
For example :
...ANSWER
Answered 2021-Jun-14 at 12:23You can speed up the process by getting rid of the two for
loops. If you used np.where
or np.all
inside the loop, then this is no wonder it took time.
I mostly have the feeling that you don't use numpy
at its best... But whatever... So to remove the for
loops I would advise you to do something like:
QUESTION
How can I replicate matrix in Haskell Accelerate?
For example, I have a matrix mat :: Matrix (Z :. 2 :. 5) ...
. I want to get a three-dimensional array with shape Z :. 9 :. 2 :. 5
.
I tried to use A.replicate (A.lift (Z :. 9 :. All)) mat
, but I get an error
Couldn't match type ‘Z’ with ‘DIM0 :. Int’ Expected type: Acc (Array (SliceShape ((Z :. Int) :. All)) a) Actual type: Acc (Matrix a)
What does that mean?
And similarly, if I have a matrix with shape Z :. 9 :. 5
, how can I get a three-dimensional array with shape Z :. 9 :. 2 :. 5
?
ANSWER
Answered 2021-Jun-14 at 10:22The problem is that the slice needs to have the same rank (number of dimensions) as the input array. All
does not mean 'all the rest of the dimensions', but it only means 'all the elements in this dimension'. So you can solve your issue with:
QUESTION
I'm having a result array of X[k][i][j] (with k in Day range from 1 to 365, i in Task range from 1 to 200 and j in Repetition range from 0 to 365).
I know how to write a 2 dimensional array from cplex to excel but 3 dimensional array to excel seems like a problem.
Is there a way to write a 3 dimensional array from cplex to excel? I tried to use the method from this link but then it said that the constraint is conflict (Maybe because of my j range from 0 to 365?)
Could someone please help me out? Thank you so much in advance!
...ANSWER
Answered 2021-Jun-14 at 08:55For 3D you may turn your array into a tuple set and then Sheetwrite your tuple set
See Excel and opl https://www.linkedin.com/pulse/excel-rocket-science-optimization-alex-fleischer
QUESTION
I have the following development that I am working on with the ElementTree and Pandas module in Python:
...ANSWER
Answered 2021-Jun-13 at 23:04you can extract the repetitive part into its own function that take as arguments the parts that change, like for example:
QUESTION
Please how do I use the .append() method to add a list with values (two dimensional lists) ?
For example if you are asked to Use the .append() method to add a list with the values of "computer science" and an associated grade value of 100 to our two-dimensional list of gradebook
How do you go about it?
...ANSWER
Answered 2021-Jun-12 at 18:20gradebook = []
class1 = ['computer science', 100]
class2 = ['history of needlework', 90]
gradebook.append(class1)
gradebook.append(class2)
print(gradebook)
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