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Snoopy


Last seen: 1 month ago Active since 2015

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MATLAB Add AWS Credentials error
I am trying to setup an AWS account within MATLAB. I get the error in the enclosed screenshot. Can anyone help?

6 months ago | 0 answers | 0

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Do I need to initiate the parallel computing toolbox for my code to run on multiple cores?
I have a function that I minimize using fmincon. I am exploring the possibility of making my code run faster. I got rid of all f...

6 months ago | 1 answer | 0

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Question


Why Halton draws do not lead to standard normal draws?
fun.m is a function generating Halton draws and standard normal draws based on that. Copyright information: the function is a si...

7 months ago | 0 answers | 0

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Why does my objective function return complex?
I have a likelihood function that I need to minimize. I use fmincon to search for the minimum. Iterations of fmincon sometimes s...

7 months ago | 1 answer | 0

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answer

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Can this for loop be vectorized?
The for loop below runs over the third dimension (page) to fill the alpha array. Is it possible to vectorize this for loop? al...

7 months ago | 1 answer | 0

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answer

Question


Can MATLAB be made cheaper?
I use MATLAB intensively for econometric research but also teaching. There is an increasing pressure or recommendation from both...

8 months ago | 2 answers | 0

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Answered
Is it possible to publish MATLAB code that can be executed online?
I managed to publish my code as html. Please see https://matlab.mathworks.com/users/mwa0000001754528/Published/html/exercisesims...

8 months ago | 0

Question


Histogram of overlaid standard normal draws
The code below overlays histograms of two sets of standard normal draws. I also attach the graph itself. These draws are based o...

11 months ago | 1 answer | 1

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answer

Question


fmincon and the Objective function returned NaN warning
I minize the negative of a log-likehood function to estimate the parameters of a mixed logit regression model. I use fmincon to ...

12 months ago | 1 answer | 0

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Question


GlobalSearch and fmincon options
I use GlobalSearch for minizing a function. I use fmincon as the solver. Does using fmincon as the solver mean that I can make u...

1 year ago | 1 answer | 0

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Question


Lower and Upper bounds in GlobalSearch
I am maximizin a log-likelihood function in an empirical econometric research to estimate a mixed logit model. For this purpose ...

1 year ago | 0 answers | 0

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Generating independent Halton sequences in same session
I would like to create two Halton sequences which should be independent of each other. I use the code below. I am worried that t...

1 year ago | 0 answers | 0

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Question


10 raised to the power
When I multiply two matrices element wise (which is probably not important to my question), some numbers appear as 3.40000000000...

1 year ago | 1 answer | 0

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answer

Question


Size of the unique elements and size of the output of accumarray
Why are the sizes of the two arrays, unique and accumarray, not the same? size(unique(MAT(:,1))) size(accumarray(MAT(:,1),MAT(...

1 year ago | 1 answer | 0

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Question


Is it possible to publish MATLAB code that can be executed online?
I have simple .m file. It contains a simulation that demonstrates the law of large numbers with a figure. What I want to do is t...

2 years ago | 2 answers | 1

2

answers

Question


Link to MATLAB documentation
In the MATLAB documentation, the "random" function is explained here https://nl.mathworks.com/help/stats/prob.normaldistribution...

3 years ago | 1 answer | 0

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Creating a function that returns multiple graphs
I would like to create a function that returns as output arguments two different histograms such that in the script file either ...

4 years ago | 1 answer | 0

1

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Question


Is there such a thing as MATLAB Markdown
Do I understand it correctly that MATLAB's Live Script is what R Markdown is for R? Otherwise how can I do what is done here htt...

4 years ago | 0 answers | 0

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Why is the no evaluate selection button?
Why is there no "evaluate selection" button in the Editor menu that one always has to use the mouse to evaluate a selection, or ...

4 years ago | 1 answer | 0

1

answer

Question


Add surface based on two vectors in 3D plot
In the code below, my aim is to mark the span spanned by the vectors x1 and x2. So I need to add a 2D surface in the 3D plot ind...

4 years ago | 1 answer | 0

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answer

Question


Moving the labels of the z axis to the back of the 3D graph
In a 3D plot such as the one produced by scatter3, the labels of the z axis are displayed on the left of the plot. Is there a wa...

4 years ago | 1 answer | 0

1

answer

Question


the isnumeric function and the NaN
I have a matrix array (A) that includes three column arrays. All columns contain integers except that one of the columns also in...

4 years ago | 1 answer | 0

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answer

Question


Is fminunc a too careful search algorithm?
I minimise a log-likelihood function in MATLAB, and it takes about five minutes. I wanted to see how much time it takes in other...

4 years ago | 0 answers | 0

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answers

Question


How to make conditional calculation?
I have two vectors, contained in matrix M, each with a dimension of 1000 by 1. Each vector contains integer numbers. The values ...

4 years ago | 2 answers | 0

2

answers

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warning about optimset and using optimoptions
Hi, I use the fminunc function and the optimset as options = optimset('GradObj','on','MaxFunEvals',1000,'MaxIter',1000,'Dis...

5 years ago | 2 answers | 0

2

answers

Answered
Is MATLAB a compiler?
From the answers above, I understand that a compiler and interpreter are two very different things, and therefore it does not ma...

5 years ago | 0

Answered
Creating dummy variables from categorical variable
I would like to ask a question here. One should always vectorise the code where possible, as I read in the literature. But in th...

5 years ago | 0

Question


Is MATLAB a compiler?
I have been using MATLAB for some time but I am still not clear how MATLAB compares to some alternative software in the followin...

5 years ago | 3 answers | 1

3

answers

Question


Creating dummy variables from categorical variable
Suppose there is a column vector array n containing unique but repeating values of the form 1 1 5 7 7 The ...

5 years ago | 4 answers | 0

4

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Answered
The "unique" function returns "Index exceeds matrix dimensions" error
Thanks a lot for the quick and detailed responses.

5 years ago | 0

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