Question

normalize hist3 plot

Is it possible to normalize a hist3 plot so the vertical axis does not have counts but rather probabilities so the volume under ...

1 year ago | 1 answer | 0

Answered

vector to struct without loop

Thanks for both suggestions, I have it working now. Out of curiosity, how would I go the other way around? If I had the the ...

vector to struct without loop

Thanks for both suggestions, I have it working now. Out of curiosity, how would I go the other way around? If I had the the ...

4 years ago | 0

Question

vector to struct without loop

I have two vectors, one with ids and another with information for each id. For each id, the vector with information has, potenti...

4 years ago | 3 answers | 0

Question

Interpolating multidimensional output and input

Hi, I have a function that uses a three-element vector as input and gives a two-element vector as output. From evaluating the...

4 years ago | 1 answer | 0

Question

Plot 3d implicit function and inequality

Hi, I need to plot a 3d equation and inequality, with some constraints. The equation and inequality are the following (u...

5 years ago | 0 answers | 0

Question

strange behavior of fminsearch

Hi, I'm solving a simple optimization problem using fminsearch and fminsearch is behaving in a strange way, and I don't know ...

6 years ago | 1 answer | 1

Question

MATLAB R2014a in Ubuntu 14.04 doesn't recognize NVIDIA GeForce GTX770

Hi, I'm running MATLAB R2014a (with parallel computing toolbox) on Ubuntu 14.04, and I have a GeForce GTX770 GPU with computi...

6 years ago | 2 answers | 0

Question

Bootstrap with observations not being rows

Hi, I'm doing an optimization routine and now I need to use the bootstrap to compute the standard errors. However, in my data...

6 years ago | 1 answer | 0

Question

find lagged values of variables

Hi, I have a matrix of data in which and observation is defined by i (people), j (alternatives), t (time). For each i, j, an...

7 years ago | 0 answers | 0

Question

Sparse knonecker product of large and several matrices

Hi, I'm trying to create a sparse kronecker product without actually generating the kron product and then generating the spar...

7 years ago | 1 answer | 0

Question

How to create a matrix containing the diagonal matrix of another one?

Hi, I have a diagonal block matrix and I would like to create another matrix that contains only the blocks of the diagonal (e...

7 years ago | 1 answer | 0

Question

parfor with wrong indexing. Trying to assign output to parts of vector

Hi, I'm trying to run a parfor loop, but I don't know how to index one of the variables. The code is the following tt=da...

7 years ago | 1 answer | 0

Question

Vectorize and use parfor in a nested loop with five levels

Hi all, I'm working on an application that, for now, requires computing a nested loop with five levels. I'm trying to vectori...

7 years ago | 1 answer | 2

Answered

Wrong way to index: Index exceeds matrix dimensions

Thanks. Yes, the max of Z is greater than the number of elements in Y, which generates the message. Is there any way to overcome...

Wrong way to index: Index exceeds matrix dimensions

Thanks. Yes, the max of Z is greater than the number of elements in Y, which generates the message. Is there any way to overcome...

8 years ago | 0

Question

Wrong way to index: Index exceeds matrix dimensions

Hi, I'm trying to use indices to expand a vector but I keep getting an error message and I don't understand why. In particula...

8 years ago | 3 answers | 0

Question

common random number when satisfying certain conditions

Hi all, I'm trying to generate a matrix of random numbers that has to satisfy the restriction that when certain conditions ar...

8 years ago | 1 answer | 0

Answered

how to use accumarray over a matrix avoiding a loop?

Thanks for your help. I will check which of the three alternatives is better for my data.

how to use accumarray over a matrix avoiding a loop?

Thanks for your help. I will check which of the three alternatives is better for my data.

8 years ago | 0

Question

how to use accumarray over a matrix avoiding a loop?

Hi, I want to sum elements of a matrix according to an index. If instead of the matrix I had a vector, I could use accumarray...

8 years ago | 3 answers | 0

Question

Showing text output in GUI instead of in the Command Window

Hi, I'm working with a GUI that I'll compile to be a stand along Windows executable to be shared with people that don't have ...

8 years ago | 1 answer | 0

Question

Product of probabilities by group

Hi, I have matrix that contains in the first column a group identifier and in the second column a probability. I want to gene...

8 years ago | 3 answers | 0

Question

Fmincon with multiple linear constraint of multidimensional array

Hi, I'm solving a minimization problem that requires a variable that is a function of parameters to be positive. However, thi...

8 years ago | 0 answers | 0

Question

Remove all fields from a struct except if

Hi, I have a struct mk with fields mk.id, mk.x and mx.z. There are 800 of each, so I have mk(1).id, ..., mk(800).id, and the ...

8 years ago | 1 answer | 0

Question

Log file of minimization done in parallel using batch

Hi, I'm working on a problem that has an outer minimization that searches over one set of parameters, and an inner minimizati...

8 years ago | 1 answer | 0

Question

Delete particular structure arrays

Hi, I'm generating some data in a random way, creating different structure arrays. Consider the following example with 3 diff...

9 years ago | 1 answer | 0

Question

Expand vectors of matrix, but a different number of times each vector

Hi all, I have the following problem. Consider a matrix of the form Z =[1 0 0 0; 1 0 0 0; 1 0 0 0; 0 0 0 1; 0 0 0 1]; ...

9 years ago | 2 answers | 0

Answered

parfor loop variable cannot be classified

by mistake...but without the semi-colon I get the same error message. I did a couple of changes to see what is causing the er...

parfor loop variable cannot be classified

by mistake...but without the semi-colon I get the same error message. I did a couple of changes to see what is causing the er...

9 years ago | 0

Question

parfor loop variable cannot be classified

Hi all, I'm trying to use parfor instead of for to deal with 3 minimizations (for now, it should increase a lot) that are indep...

9 years ago | 2 answers | 0

Question

Create a vector summing different elements from another vector

Hi, I'm trying to do the following. Suppose you have a vector A=ones(10,1) and another vector id=[1 1 1 2 2 3 3 3 3 3]'. I wo...

9 years ago | 1 answer | 0