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Octavian


University of Texas Health Science Center San Antonio

28 total contributions since 2013

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Question


How to use eval(sprintf) without padding?
Dear All, I inherited a code snippet as part of a larger routine, so I have to use it with minor modifications. With it, a t...

2 years ago | 3 answers | 0

3

answers

Question


Error parfor worker aborted
Dear All, I have a parfor loop with n iterations (n between 20 and 200), and using input matrices depending n^2 on the size ...

4 years ago | 0 answers | 0

0

answers

Question


Clearing variables in function workspace effect on memory
Dear All, I have a script calling a function, with several large matrices present in this function's workspace. I would need...

4 years ago | 1 answer | 0

1

answer

Question


help vectorize code for GPU
Dear All, I have a for loop code snippet which in essence, involves 2D matrix or elementwise multiplication, and 2D matrix a...

4 years ago | 1 answer | 0

1

answer

Question


Square matrix factorization to increase sparsity for GPU use
Dear All, I have a full (no zeros) real asymmetric square matrix A in a loop on the GPU (to increase execution speed compare...

4 years ago | 0 answers | 0

0

answers

Question


parallel processing on one (several) GPUs
Dear All, Can I execute a parallel script on one GPU? If not, how can I direct each worker to a specific GPU of choice (say ...

4 years ago | 1 answer | 0

1

answer

Question


GPU gather command clarification and GPU memory usage
Dear All, 1. If x is a gpuarray, and y its cpu correspondent, after the command y=gather(x) is x still on the GPU or ...

4 years ago | 1 answer | 1

1

answer

Question


Diagonal matrix size reduction
Dear All, I have a loop written for GPU (gpuarrays) with multiple matrix inputs, one of which is a diagonal matrix A with si...

4 years ago | 1 answer | 0

1

answer

Question


How to use ResizeFcn to normalize MarkerSize (plot3) and FontSize (text)?
Dear All, I have a figure containing several linked objects (a plot3 surface, a plot3 set of 3D points, and a set of associa...

4 years ago | 0 answers | 0

0

answers

Question


How to add to a figure a second set of 3D axes insensitive to rotate3d, pan, zoom?
Dear All, I have a plot3 object (3D surface) in a figure that I can (and often have to) freely rotate3d, pan, zoom. I need t...

4 years ago | 1 answer | 0

1

answer

Question


How to pass iteration information to fmincon's nonlcon function?
Dear all, My code uses fmincon to minimize the distance from (snap) a set of points to a surface and find snapped coordinate...

4 years ago | 0 answers | 0

0

answers

Question


Issues with zooming using ActionPreCallback ActionPostCallback
Dear All, Zooming and rotating 3D a large object (cortex hull) by mouse click leads to a very and slow and choppy object mov...

4 years ago | 0 answers | 0

0

answers

Question


How to compare workspace variable to variable saved on disk and save if different.
Dear All, here is my challenge. I use an script that generates an output variable varx in workspace and saves it to a binary...

4 years ago | 0 answers | 0

0

answers

Question


validate function inputs independent of position and name
Dear All, I have the function f(a b c d), with a b c d inputs all structure arrays, a and b required, c and d optional. I ...

5 years ago | 1 answer | 0

1

answer

Question


sprintf literal output as next pending command
Dear All, I have a cell array DD with cells containing strings formed from letters, eg 'SFG' (some consecutive cells have id...

5 years ago | 0 answers | 0

0

answers

Question


adding empty numerical fields in structure array
Dear All, I am sure this is trivial for you wizzes. I have a structure A with fields A.field1,A.field2, A.field3, with fiel...

5 years ago | 1 answer | 0

1

answer

Question


gpu memory code optimization
Dear Wizes, I would appreciate if you could break this: My code includes gpuArray operations inside a for loop; the relevan...

5 years ago | 0 answers | 0

0

answers

Question


How to optimize gpuArray operation to minimize GPU memory
Dear All, I have to do A-B, where A, B are gpuArrays of 20000X20000 elements (single precision). Each of A and B is ~ 1.6 Gb...

5 years ago | 1 answer | 0

1

answer

Question


gpuArray memory requirement estimation
Dear All, I was running a script employing parallel processing and a gpuArray structure. I get the following error on two PC...

5 years ago | 2 answers | 0

2

answers

Question


How to build a ROC curve using perfcurve with a single class?
Dear All, I study a method that estimates the position of a set of test points against a reference point. One of the metrics...

5 years ago | 0 answers | 0

0

answers

Question


how to find the weighted centroid, center of mass/barycenter of a 3D grid of points
Dear all, I am new to matlab, I need to find the coordinates of the center of mass of a regular 3D grid of points, each point ...

5 years ago | 1 answer | 0

1

answer

Answered
How to use eval(sprintf) without padding?
Dear Image Analyst & All, I found a solution, to follow to my initial code posted; these lines would delete those all 0 rows ...

6 years ago | 0

| accepted

Answered
How to use eval(sprintf) without padding?
Sorry, but the above does not save individual .mat arrays for each cluster (SO, MO and OP), nor gets coordinates in the orde...

6 years ago | 0

Question


How to load variable listed in folder one at a time and run a script sequentially
Dear all, I have different .mat expressions (values) of the same variable VAR in a list of numerical arrays named differentl...

6 years ago | 1 answer | 0

1

answer

Answered
how to plot semilogy on two axes
Dear dpb, set(H2,'Color','none'); is necessary, otherwise data plots are obscured during the second x axis (top, H2) defi...

6 years ago | 0

Question


how to plot semilogy on two axes
Dear All, I have three sets of data (y1,2,3), and I want to plot them on a semilogarithmic (y) scale using the same x scal...

6 years ago | 2 answers | 0

2

answers

Question


how to change matlabroot on ubuntu 12.04
Dear All, I have 2012b installed and working on my ubuntu 12.04 box, I just downloaded and installed the 2013b version, but ...

6 years ago | 1 answer | 0

1

answer

Question


multivariate normal random numbers noise
Dear All, I need to simulate multivariate noise according to noise variance (mu) in a number of sensors, and covariance (sig...

6 years ago | 0 answers | 0

0

answers