Finishing PhD soon.

Vision science; neurophysiology (single unit); sensory-motor feedback and control; control systems; steering & navigation; multisensory integration; top-down bottom-up feedback loop.

Helping others is the greatest learning opportunity.

University of Rochester, NY

New Bulgarian University, Sofia Bulgaria

EMAIL:

I only reply to emails about my file submissions. If you want to bring a question to my attention, send the link to the question.

Answered

Low Pass filter for big experimental data set

My hunch is that x1 should be a vector (not a matrix) and that Fx is a column vector. If this hunch is correct, the solution ...

Low Pass filter for big experimental data set

My hunch is that x1 should be a vector (not a matrix) and that Fx is a column vector. If this hunch is correct, the solution ...

21 hours ago | 0

| accepted

Answered

Put workspace data into menu and prompt someone to select it

You weren't saving the user's selections (menu outputs). The output to menu is an index of the user's selection. Use those ind...

Put workspace data into menu and prompt someone to select it

You weren't saving the user's selections (menu outputs). The output to menu is an index of the user's selection. Use those ind...

1 day ago | 0

| accepted

Answered

Return data from GUIDE on figure close

To delay a GUIDE-GUI output until the GUI is closed, follow these steps. A functional demo is attached that produces an empty G...

Return data from GUIDE on figure close

To delay a GUIDE-GUI output until the GUI is closed, follow these steps. A functional demo is attached that produces an empty G...

1 day ago | 0

| accepted

Answered

Placing annotations at specific xy coordinates

Annotations are a pain to use unless the axes are normalized to 0:1. I see no reason why Matlab cannot allow users to specify t...

Placing annotations at specific xy coordinates

Annotations are a pain to use unless the axes are normalized to 0:1. I see no reason why Matlab cannot allow users to specify t...

1 day ago | 0

| accepted

Answered

Carrying over variables in app-designer

Avoid using global variables. Instead, you can define a new property of your app that stores the fileLoc data. The process is...

Carrying over variables in app-designer

Avoid using global variables. Instead, you can define a new property of your app that stores the fileLoc data. The process is...

2 days ago | 2

| accepted

Answered

How to ask the user how many file extensions to search for

That's too much work (for you and the user). Instead, the user could just list all file extensions in the first dialog, separat...

How to ask the user how many file extensions to search for

That's too much work (for you and the user). Instead, the user could just list all file extensions in the first dialog, separat...

2 days ago | 1

| accepted

Answered

Having trouble using cell2mat

You were on the right track. You're reading the data as cell array of strings so you need to convert the data to numeric using ...

Having trouble using cell2mat

You were on the right track. You're reading the data as cell array of strings so you need to convert the data to numeric using ...

2 days ago | 0

Answered

Copying a matlab gui to a different directory

This is among the common problems with GUIs produced in GUIDE. Many volunteers in this forum are not shy about their disdain fo...

Copying a matlab gui to a different directory

This is among the common problems with GUIs produced in GUIDE. Many volunteers in this forum are not shy about their disdain fo...

2 days ago | 0

Answered

Is it possible to draw a bar plot with percentage lines?

Use cumsum() to compute the cumulative sum of each bar height. Then you can normalize it to the max bar height (this is how I i...

Is it possible to draw a bar plot with percentage lines?

Use cumsum() to compute the cumulative sum of each bar height. Then you can normalize it to the max bar height (this is how I i...

2 days ago | 1

Answered

How to count date occurrence independently of year?

This solution creates a table (T) that lists all month-day combinations in your data in 1 column and the count in the 2nd column...

How to count date occurrence independently of year?

This solution creates a table (T) that lists all month-day combinations in your data in 1 column and the count in the 2nd column...

2 days ago | 0

| accepted

Answered

unexpected string scalar error?

There are 2 required inputs and 1 optional input to taylor() followed by optional name-value pair arguments. Your call to taylo...

unexpected string scalar error?

There are 2 required inputs and 1 optional input to taylor() followed by optional name-value pair arguments. Your call to taylo...

2 days ago | 0

Answered

How to compare a coefficient from two regression

One way would be to compute the 95% confidence interval of the regression coefficients and determine whether they overlap (which...

How to compare a coefficient from two regression

One way would be to compute the 95% confidence interval of the regression coefficients and determine whether they overlap (which...

2 days ago | 0

Answered

Alternative to "drawnow" to plot real time data inside while loop

"Are there alternatives to "drawnow" to plot complex data in real time?" I can think of two things to try. 1) instead of call...

Alternative to "drawnow" to plot real time data inside while loop

"Are there alternatives to "drawnow" to plot complex data in real time?" I can think of two things to try. 1) instead of call...

2 days ago | 0

| accepted

Answered

how can i add two matrix vertically with different column

Bpad = padarray(B,[0,numel(A)-numel(B)],'post'); C = [A;Bpad]

how can i add two matrix vertically with different column

Bpad = padarray(B,[0,numel(A)-numel(B)],'post'); C = [A;Bpad]

3 days ago | 1

Answered

Converting time data to plot

After you convert to datetime, keep it in datetime format. There's no need to convert it to char. From r2016b onwards, you c...

Converting time data to plot

After you convert to datetime, keep it in datetime format. There's no need to convert it to char. From r2016b onwards, you c...

3 days ago | 1

Answered

How to put uitable in new figure using GUIDE?

You can keep the UI table on the main GUI window and toggle its visibility using the "Visible" property. When the UI table is n...

How to put uitable in new figure using GUIDE?

You can keep the UI table on the main GUI window and toggle its visibility using the "Visible" property. When the UI table is n...

3 days ago | 0

| accepted

Answered

Count how many elements are present inside arrays

Here is an anonymous function that can be applied to any two vectors. The vectors can be any lengths and any orientation (row or...

Count how many elements are present inside arrays

Here is an anonymous function that can be applied to any two vectors. The vectors can be any lengths and any orientation (row or...

3 days ago | 0

Answered

remove repeated rows to produce two new matrices

% Convert b to [first,last] non-zero per row b2 = splitapply(@(x)x([find(x~=0,1,'first'),find(x~=0,1,'last')]),b,(1:size(b,1))....

remove repeated rows to produce two new matrices

% Convert b to [first,last] non-zero per row b2 = splitapply(@(x)x([find(x~=0,1,'first'),find(x~=0,1,'last')]),b,(1:size(b,1))....

3 days ago | 0

| accepted

Answered

Does the One-way ANOVA test on MATLAB check that the conditions for applying ANOVA are met?

Great question, +1 Matlab does not perform any assumption checks to my knowledge. So yes, you need to perform those tests pr...

Does the One-way ANOVA test on MATLAB check that the conditions for applying ANOVA are met?

Great question, +1 Matlab does not perform any assumption checks to my knowledge. So yes, you need to perform those tests pr...

4 days ago | 0

Answered

Change "Items" in a Discrete Knob with another knob

For Knobs (continuous) There are a few things wrong with your callback function. I've listed them in order of importance. Th...

Change "Items" in a Discrete Knob with another knob

For Knobs (continuous) There are a few things wrong with your callback function. I've listed them in order of importance. Th...

4 days ago | 0

| accepted

Answered

average RGB values from list of pixels.

If x is your 1xnx3 array, meanRGB will be a 1x3 vector of the average rgb values. meanRGB = mean(squeeze(x),1); Here's th...

average RGB values from list of pixels.

If x is your 1xnx3 array, meanRGB will be a 1x3 vector of the average rgb values. meanRGB = mean(squeeze(x),1); Here's th...

4 days ago | 0

Answered

How to get normalized coordinates of an ROI?

"How do I convert these pixels to normalized cooridinates? " You can do the conversion yourself by dividing the ROI pixel dimen...

How to get normalized coordinates of an ROI?

"How do I convert these pixels to normalized cooridinates? " You can do the conversion yourself by dividing the ROI pixel dimen...

4 days ago | 0

| accepted

Answered

How to draw the below type of graph in MATLAB?

"Feb" in your excel file has a $ character which needs fixed. If you have many excel sheets, you can fix it from within the cod...

How to draw the below type of graph in MATLAB?

"Feb" in your excel file has a $ character which needs fixed. If you have many excel sheets, you can fix it from within the cod...

4 days ago | 3

Answered

Find a raw position referred to a value in a matrix

rowNum = find(any(A > 2000,2),1,'first');

Find a raw position referred to a value in a matrix

rowNum = find(any(A > 2000,2),1,'first');

5 days ago | 0

| accepted

Answered

fmincon and Getting "Solution" Before Convergence Tolerance is Hit

From the Editor, press the pause button (first panel below). Execution will eventually pause but it may not be within the funct...

fmincon and Getting "Solution" Before Convergence Tolerance is Hit

From the Editor, press the pause button (first panel below). Execution will eventually pause but it may not be within the funct...

5 days ago | 1

| accepted

Answered

How I can solve, index exceeds matrix dimensions

The code that contains the problem is copied below from your pdf attachment. The error happens when 'o' becomes larger than the ...

How I can solve, index exceeds matrix dimensions

The code that contains the problem is copied below from your pdf attachment. The error happens when 'o' becomes larger than the ...

5 days ago | 0

| accepted

Answered

Plotting 3D scatter plot from elements in a matrix

m = randi(100,47,4); % Here is your (fake) 47x4 data [x ,y] = ndgrid(1:size(m,1),1:size(m,2)); % produce x and y coordi...

Plotting 3D scatter plot from elements in a matrix

m = randi(100,47,4); % Here is your (fake) 47x4 data [x ,y] = ndgrid(1:size(m,1),1:size(m,2)); % produce x and y coordi...

5 days ago | 0

| accepted

Answered

Why can't I use a variable to put all .txt files in a directory into an array?

Here's a bunch of feedback. 1) don't use "clear all". Here's why: link. clc clear % clear all % avoid doing this. 2)...

Why can't I use a variable to put all .txt files in a directory into an array?

Here's a bunch of feedback. 1) don't use "clear all". Here's why: link. clc clear % clear all % avoid doing this. 2)...

5 days ago | 0

Answered

Migrated GUIDE to App Designer -- App partially off screen

Open the app in appdesigner. In the component browser, select the main figure. Then check the "Position" property and deter...

Migrated GUIDE to App Designer -- App partially off screen

Open the app in appdesigner. In the component browser, select the main figure. Then check the "Position" property and deter...

6 days ago | 0

| accepted

Answered

Why am I not getting the full output from my for loop?

Try this (shot in the dark) idx = [12 19]; for i = 1:numel(idx) for k = 1:16 x{k} = [S1{1,idx(i)}.t_data*1e3,S1{1,i...

Why am I not getting the full output from my for loop?

Try this (shot in the dark) idx = [12 19]; for i = 1:numel(idx) for k = 1:16 x{k} = [S1{1,idx(i)}.t_data*1e3,S1{1,i...

6 days ago | 0