Mario Trevino

Johns Hopkins University

Last seen: circa un mese fa | Attivo dal 2011

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Need to create audio signal for perceptual task
Hi there everyone, Im working with a perceptual task. Imagine we have a dot that is projected on your screen. On different trial...

circa un mese fa | 0 risposte | 0

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Domanda

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?

oltre un anno fa | 1 risposta | 0

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Domanda

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...

oltre un anno fa | 2 risposte | 1

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Domanda

Problems with urlread/webread
Hi there everyone Im using a function to download stock prices from yahoo finance. The function works well with most of the tic...

quasi 4 anni fa | 0 risposte | 0

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Domanda

INTRADAY STOCK PRICES WITH A FREE PROVIDER?
I wonder if there is a way to access intraday stock prices at no cost from a provider? Previously we could do that directly fro...

quasi 5 anni fa | 0 risposte | 0

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Domanda

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...

quasi 5 anni fa | 1 risposta | 0

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Domanda

LifeCam Webcams Crashing in Matlab 2016a after windows update
Hi everyone Im having a serious problem trying to use my Microsoft LifeCam Webcams through MATLAB 2016a, the system can detect ...

circa 5 anni fa | 0 risposte | 1

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Domanda

VERY SLOW aqcuisition of video frames using snapshot function compared to windows camera
Im trying to acquire videos using Matlab and Microsoft webcam with maximum resolution, yet the effective sampling frequency is e...

oltre 6 anni fa | 0 risposte | 1

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Domanda

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...

oltre 8 anni fa | 0 risposte | 0

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Domanda

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 ...

quasi 9 anni fa | 0 risposte | 0

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Domanda

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 ...

oltre 9 anni fa | 2 risposte | 0

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Domanda

A hidden variable problem?
Hi everyone, I have a new problem in my hands and dont know the best way to approach it. I have the mRNA expression levels for ...

oltre 9 anni fa | 0 risposte | 0

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Domanda

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...

oltre 9 anni fa | 2 risposte | 0

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Domanda

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

oltre 9 anni fa | 2 risposte | 0

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Domanda

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...

oltre 9 anni fa | 2 risposte | 0

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Domanda

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

quasi 10 anni fa | 1 risposta | 0

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Domanda

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...

quasi 10 anni fa | 1 risposta | 0

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Domanda

Is there such a thing as an unsupervised optimized sampling?
I have sigmoidal processes which I want to sample with, say, 10 points each. I dont know, a priori, the shape of each sigmoid....

circa 10 anni fa | 0 risposte | 0

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Domanda

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...

oltre 10 anni fa | 2 risposte | 0

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Domanda

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 ...

oltre 10 anni fa | 2 risposte | 0

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Domanda

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...

oltre 10 anni fa | 1 risposta | 0

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Domanda

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

quasi 11 anni fa | 4 risposte | 0

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Domanda

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:...

quasi 11 anni fa | 1 risposta | 0

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Domanda

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...

quasi 11 anni fa | 1 risposta | 0

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Domanda

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 ...

quasi 11 anni fa | 1 risposta | 0

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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...

circa 11 anni fa | 0

Domanda

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...

circa 11 anni fa | 3 risposte | 1

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Domanda

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...

oltre 11 anni fa | 1 risposta | 0

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Domanda

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);...

oltre 11 anni fa | 1 risposta | 0

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

oltre 11 anni fa | 0

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Mario Trevino

Johns Hopkins University

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