# dleal

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Question

why is acumarray much slower calculating means than sum?

Hi all, why is acumarray much slower calculating means than sum? I understand averages are slightly more complex, but I woul...

2 years ago | 2 answers | 0

### 2

answershow can I change a n*1 matrix to a n*6 matrix with a condition based on column value?

If you have the Statistics and Machine Learning Toolbox you can do use dummyvar: A = [1,1,2,4,4, 5,6]'; >> dummyvar(A) an...

2 years ago | 0

| accepted

Question

access array multiple times and calculate some value

Hi all, I would like to know if there's a faster way that using a foor loop for this: a = rng(99); A = randn(1,100); B = [20 ...

2 years ago | 1 answer | 0

### 1

answerQuestion

list comprehension in MATLAB using Python interface

Hi all, using MATLAB's Python interface, is there a way to do a list comprehension in MATLAB? Sample problem python list compr...

2 years ago | 1 answer | 0

### 1

answerQuestion

long integers in matlab

Hi all, how can we do (simple) operations in Matlab with integers that exceed intmax("uint64")? I am aware that in Python thi...

2 years ago | 3 answers | 0

### 3

answersQuestion

create static method in app designer

Hi all, How do I create static methods in the App Designer? The dropdown menu only allows me to create either public or privat...

2 years ago | 1 answer | 0

### 1

answerQuestion

python environment mysteriously loads by itself?

The title of this post summarizes the issue. I am slighty confused why Python loads without my explicit permission. I am workin...

2 years ago | 1 answer | 0

### 1

answerQuestion

proper use of DataQueue and PollableDataQueue inside of App Designer class?

Hi all, I am aware there are some limitations for the usage of Parallel Computing Toolbox inside of App Designer. How could I s...

2 years ago | 1 answer | 0

### 1

answerQuestion

iteratively plot in multiple figures with subplots

Hi all, I want to create 2 figures, each with 2 embedded subplots. Then, I would like to alternatively add points to each of t...

2 years ago | 1 answer | 0

### 1

answerQuestion

Updating plot in loop takes increasing amount of time

When I update a plot within a loop, each iteration takes longer after a while. Is there a way to avoid the slowdown? See example...

2 years ago | 2 answers | 0

### 2

answersQuestion

dsp.MatFileReader HDF5 library encountered an error

Hi all, I am getting this error with MatFileReader which I don't know how to fix. The function below simply reads a mat file wit...

2 years ago | 1 answer | 0

### 1

answerQuestion

streaming real-time financial data in MATLAB

Hi all, I would like some guidance as to how to frame the following streaming problem in MATLAB. I am currently trying to stream...

2 years ago | 1 answer | 0

### 1

answerQuestion

access elements of vector within struct

Hi all, I want to update the values of a vector, within a struct, recursively, in a for loop. In particular, I am receiving rea...

2 years ago | 2 answers | 0

### 2

answersQuestion

accumulate values in aftereach function

Hi all, I would like to accumulate values that I collect in real time from a function that runs in the background. For exam...

2 years ago | 1 answer | 0

### 1

answerQuestion

Assign different resources to different processes running in background

Hi all, I am trying to set up two independent processes running in the background. The first process would generate data (genDa...

2 years ago | 1 answer | 0

### 1

answerQuestion

Change table variable type

Hello, I am trying to change all variables in a table from int64 to double. I know I should use the "double" function, but for ...

2 years ago | 1 answer | 0

### 1

answerQuestion

MATLAB PollableDataQueue get last value

Is it possible to make the a MATLAB PollableDataQueue last-in-first-out (LIFO) instead of first-in-first-out (FIFO)? Alternative...

2 years ago | 1 answer | 0

### 1

answerQuestion

pass Python object as argument to function in "parfeval"

I am trying to pass one Python object as an argument to a function that I am evaluating in the background with parfeval. The Pyt...

2 years ago | 1 answer | 0

### 1

answerSolved

Given a window, how many subsets of a vector sum positive

Given a vector: [1 0 -1 3 2 -3 1] and a window of 2, A sliding window would find: 1 + 0 = 1 0 - 1 = -1 ...

2 years ago

Question

Matlab Github integration on 2021a "incorrect username and password"

I am following this MATLAB Youtube video on how to use source control in matlab on Github https://www.youtube.com/watch?v=O7A27...

2 years ago | 1 answer | 4

### 1

answerQuestion

don't understand "training" method in cvpartition class

the "cvpartition" class in the statistics and machine learning toolbox as the following method: function trainIndices = train...

2 years ago | 1 answer | 0

### 1

answerSolved

Reindex a vector

You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place th...

2 years ago