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# H H

Last seen: 9 dagen ago Active since 2015

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A quick way to make sure the columns in each row are decreasing for matrix A
Hello everyone, I have a matrix A with 100 rows and 20 columns. I would like to ensure that for evry and each row "i", the va...

17 dagen ago | 1 answer | 0

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Question

Training a neural network that can map random variables to timeseries
Hi All. I have a numerical model, which accepts the vector X ( say three real parameters), and generate two timeseries y1(t), an...

ongeveer 2 maanden ago | 0 answers | 0

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K-mean Clustering
Plese see: https://www.mathworks.com/help/stats/kmeans.html. If your data is in a matrix format X, then you can use the followi...

ongeveer een jaar ago | 1

How to use spline interpolation to find intersection point of two lines.
How about this? clc clear all x = -10:1:1; y1=-x; y2=x+6; %spline1 s1 = spline(x,y1); %spline 2 s2=spline(x,y2); % fin...

ongeveer een jaar ago | 0

| accepted

Question

How to remove the for loop from the following code?
'Index' is an array of length N. Every elemnt of the array Index is an integer (from 1 to 7) "xxtr" is a sample matrix with siz...

ongeveer een jaar ago | 1 answer | 0

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Plotting 2D curves with specific colors for certain curves
Hi all. I have 1000 simple 2D curves (data = rand(1000,20)). X axis for all is from (x=1:20). Each curve has an index between 1 ...

meer dan een jaar ago | 1 answer | 0

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Question

Gaussian process regression optimization
Can anyone please let me know how can I exclude some Kernel functions from being optimized in the following regression process? ...

meer dan een jaar ago | 0 answers | 0

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Question

extract data from a 1D vector with a pattern
I have a 1D vector A=[1:1000]. I would like to start from the first elemnt of A and automatcially extract every first 16 elemnts...

meer dan een jaar ago | 1 answer | 0

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Question

How to do logarithmic downsampling
How to downsample the data in a vector by only keeping n samples per each log-cycle? For example I would like to downsample the ...

bijna 2 jaar ago | 0 answers | 0

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Question

Matlab clears persistent and global variables in fmincon when activating UseParallel
It seems matlab clears all global and persistent variables within the objective function when using "UseParallel" in fmincon. I ...

bijna 2 jaar ago | 1 answer | 0

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Question

Kill a system process if it takes too long
I use a system command to run an external program PERR that takes the input file DATA.data + some other arguments to run. After ...

bijna 2 jaar ago | 1 answer | 0

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Question

A Suitable Machine Learning Technique to Learn Y=f(X,t)
I have a blackbox model that accepts an input vector X (variables) and gives three outputs Ys but as a function of time Y1(t), Y...

meer dan 2 jaar ago | 1 answer | 0

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Solve for ODE question
This is similar to an SIR model. There are plenty of simple to complex source code for this https://www3.nd.edu/~nancy/Math2075...

bijna 3 jaar ago | 1

| accepted

Question

Some workers go idle in parfor creating a waste of computation time
Hi all, I have a for loop of 90 iterations (array xx has 90 rows and say 20 colums - each row is an iteration). Each iteration ...

bijna 3 jaar ago | 1 answer | 0

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Question

Matlab parfor on Slurm
Hi All, I want to run a parfor on matlab using Slurm job submission on the cluster. I want to use 15 workers for the parfor. E...

bijna 3 jaar ago | 1 answer | 0

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Question

Is there a quick way to put the contents of all subfolders to the parent folder
Hi, I have a folder (A) with lots of subfolders say RL1,RL2, ....RLn. Each subfolder has different contents. Is there any way...

bijna 3 jaar ago | 0 answers | 0

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Question

Using parfor with a structure
Hi All. I have a qyucik question on the use of parfor and an structure: A code I have runs perfectly with for loop as follows: ...

ongeveer 3 jaar ago | 1 answer | 0

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Question

Make matlab write to a text file WITHOUT scientific notation.
Hi there, I have a matrix say 5*5. The matrix contain some numerical values with many digists shown in scientific notation. I ...

ongeveer 3 jaar ago | 1 answer | 0

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Question

How to delete the columns of a cell array if the last elements of the columns are zero
Hi All, I have a large cell arry PP with three rows and lots of columns as follows: 'A.txt' 'A2.bmp' 'A5.jpg' 1.1 1.3 1.4 ...

bijna 4 jaar ago | 1 answer | 0

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Question

Open a jpg picture for each data point by clicking on the plot
Hi there. I have a simple 2D data set (x,y). Each point (xi,yi,i) (i=0,..n) corresponds to a JPG picture. The JPG names are (0....

ongeveer 4 jaar ago | 1 answer | 0

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Question

replacing the content of a text file
Hi all. I have a text file "A.txt". I have a string S='Hello World'. How to delete from line 10 to the end of file in "A.tx...

meer dan 4 jaar ago | 1 answer | 0

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Question

Precision lost when change numbers to string
Hi I am trying to use the following to generate a string. A is is 1D array containing 4 real numbers that have large decimal pr...

ongeveer 5 jaar ago | 2 answers | 0

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Question

Generate a single string from a matrix (or cell)
Hi. I have a vector A that is [1:5]' and also I have a string 'Hi'. (I just use a of length of 5 for simplicity, but can be la...

ongeveer 5 jaar ago | 1 answer | 0

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Question

Logarithmic spaced vector with a known sum
How to generate n logarithmic(or geometric) spaced numbers between a and b such that sum of them be a real number A ?

ongeveer 5 jaar ago | 0 answers | 0

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Question

Function counts using parallel Fmincon
Hello all, I would like to use parallel fmincon. The function receivea an input vector X, generates a file name say Filei.txt...

meer dan 5 jaar ago | 1 answer | 0

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Question

Only upper triangle part of plotmatrix function
Hello, Is it possible to only plot the upper triangle part of the matrix plots when using 'plotmatrix' function? matrixplot ge...

meer dan 5 jaar ago | 2 answers | 0

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Question

Delete lines n to m in many text files
Hello there, I have 500 text files with names R1.txt to R500.txt. How can delete lines 5002 to 5012 from all the text file...

meer dan 5 jaar ago | 2 answers | 0

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Question

parfor and persistent variables
Dear all, I have a matlab function that accepts a set of parameters say (query array), generates a unique input data (text) f...

meer dan 5 jaar ago | 1 answer | 0

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Question

Creating a Parfor loop for multiple function evaluation
Hello. I want to use parfor to reduce the calculation time for a loop I have by evaluating 6 functions at the same time. Could y...

meer dan 5 jaar ago | 1 answer | 0