Mario Trevino

Johns Hopkins University

Last seen: 8 months ago | Active since 2011

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Can someone help me open a Simulink file from an old version of matlab? (probably around year 2000)
Hi there everybody I wonder if someone of you could help me open an old Simulink file and store it in a more recent version?

3 years ago | 1 answer | 0

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Question

Password protect mat files
Hi there everybody, Im writing an application and I would like to password protect the generated mat files... is there an easy w...

3 years ago | 2 answers | 1

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answers

Question

cannot send an email through matlab
Im not being able to send an email thgourh matlab.... My google account allow external applications to use it.... here is the c...

6 years ago | 1 answer | 0

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answer

Question

Adding a special boundary condition to an ODE
Hi everyone! Im solving an ODE using fmincon and a cost function. Im able to find the best parameters of the model and Im happy...

10 years ago | 0 answers | 0

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answers

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displaying SET operations with MATLAB
hi everyone Im performing some set operations with MATLAB and I wonder wherther you know of any nice application which I could ...

10 years ago | 0 answers | 0

0

answers

Question

Yaw, Pitch and Roll
hi Everyone I have a video where I record, on each frame, the location of a little plaque with 4 colored dots (different color ...

11 years ago | 2 answers | 0

2

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Display precision vs actual precision
Hi everyone We are running some simulations in MATLAB and storing the results afterwards. Yet, we are concerned that the actual...

11 years ago | 2 answers | 0

2

answers

Question

how to send me an email from matlab running on another computer?
any suggestions?

11 years ago | 2 answers | 0

2

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Question

detecting computer ID from matlab
Hi everyone, I wonder if any of you can tell me how to get the computer ID from within matlab? I want to make a compiled functi...

11 years ago | 2 answers | 0

2

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Question

Cell Arrays vs Matrices
Gentlemen, are cell arrays faster or slower than Matrices to store numbers? thanks in advance! mario

11 years ago | 1 answer | 0

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Question

homogeneous distribution of particles over the surface of a sphere
hi everyone, I have a very simple question Im using random numbers from a uniform distribution (range from 0 to 2*pi) to create...

11 years ago | 1 answer | 0

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Question

Creating synthetic images with controlled properties?
Hi everyone, Im trying to find out if there is a clever way to mathematically generate a set of different images with some key s...

12 years ago | 2 answers | 0

2

answers

Question

how to open many matlab instances from matlab?
hi there, I want to make a function that opens multiple matlab instances (from within matlab) and then starts running different ...

12 years ago | 2 answers | 0

2

answers

Question

RGB colors in scatter3
Im trying to plot n [X,Y,Z] dots in 3d with their colors given by C which is a nx3 matrix describing the RGB colors for each dot...

12 years ago | 1 answer | 0

1

answer

Question

how to get name of a function (within the function)
Wise gentlemen: how do I get the name of a function within the function?

12 years ago | 4 answers | 0

4

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Question

Renaming files without preserving their date and creation time
I want to rename files but without preserving their original date and creation times.So far, Ive tried two options: OPTION 1:...

12 years ago | 1 answer | 0

1

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Question

Can you help me with a logistic regression?
I need to solve the following system: log(pR,i/pL,i)=SIGMA{ alpha_j [(rR,i-j)-(rL,i-j)]}+SIGMA{ beta_j [(cR,i-j)-(cL,i-j)]}+g...

12 years ago | 1 answer | 0

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Question

Recover image from current figure without saving it
Suppose I have: figure imshow(matrix) hold on scatter(x2,y2,size2,color2, 'filled') axis square axis off ...

12 years ago | 1 answer | 0

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Answered
How to make a set of RGB color combinations
Hey there, thanks for your help Im solving an image processing problem, and Im planning to create multiple masks with different...

12 years ago | 0

Question

How to make a set of RGB color combinations
I want to build a finite set of RGB colors, say 100, which maximices the overall differences (Euclidean distance) between each o...

12 years ago | 3 answers | 1

3

answers

Question

How to build a rotationally symmetric mask?
Hi everyone, suppose I have 'p' given by a generalized Gaussian function and want to make a rotationally symmetric mask of it (i...

13 years ago | 1 answer | 0

1

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Question

Need help to classify a variable for parallel computing
I have something like: parfor .... [blobCentroid(i-chunk,1:2),blobOrientation(i-chunk,1)]=blob_analysis(vidFrame_bn);...

13 years ago | 1 answer | 0

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Answered
VideoReader.m and read.m in MATLAB 64 bit
NICE! little bug, simple solution, big headache. thank you very much Walt!

13 years ago | 0

Question

VideoReader.m and read.m in MATLAB 64 bit
read function is crashing at line 91 even after updating line 91 if( ~isempty(obj.NumberOfFrames) ) with if( ~isem...

13 years ago | 2 answers | 0

2

answers

Question

Image Segmentation of cells
Hi everybody, Im trying to detect cells in images for which Im using some functions based on watershed segmentation. However, th...

13 years ago | 1 answer | 0

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Question

Optimization of two linear models with constraint
I have a dataset which is a 'v-shaped' pattern of dots: y_observed and want to adjust two linear regressions with a turning poin...

13 years ago | 1 answer | 0

1

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Question

returning the indexes of an image displayed with a specific colormap
hi, does anyone know hot to get the numeric indexes of a displayed image with a specific user defined colormap??? for example...

13 years ago | 1 answer | 0

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Question

Solving an ODE with best-fit adjustment to empirical observations
Hi everybody, I want to numerically solve an ODE but I want to fit the constants to experimental data following that ODE. Any si...

14 years ago | 1 answer | 0

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Question

ODE with discrete, external input
Hi everybody, I want to solve a simple ODE for specific discrete time points in which constats are updated externally for each s...

14 years ago | 2 answers | 0

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answers