12,128 total contributions since 2012

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PROFESSIONAL: Physician (M.D.): Diplomate of the American Board of Internal Medicine; M.Sc. Biomedical Engineering: Instrumentation, Signal Processing, Control, System Identification, Parameter Estimation

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Answered

System Identification Toolbox - Continous or discrete model?

It would seem to depend on your eventual application of the identified model. If you’re going to construct a completely analogu...

System Identification Toolbox - Continous or discrete model?

It would seem to depend on your eventual application of the identified model. If you’re going to construct a completely analogu...

1 hour ago | 0

Answered

How can i calculate area under the cyclic curve and max ordinate of every curve?

Try this: [D,S] = xlsread('Scatter curve.xlsx'); Col1 = S{1,1}; Col2 = S{1,2}; D = D(~any(isnan(D),2),:); ...

How can i calculate area under the cyclic curve and max ordinate of every curve?

Try this: [D,S] = xlsread('Scatter curve.xlsx'); Col1 = S{1,1}; Col2 = S{1,2}; D = D(~any(isnan(D),2),:); ...

2 hours ago | 0

Answered

Plot bunch of 2D data to 3D surface plot

I have no idea what your functions and data are, however plotting them is straightforward using the plot3 function. Example —...

Plot bunch of 2D data to 3D surface plot

I have no idea what your functions and data are, however plotting them is straightforward using the plot3 function. Example —...

5 hours ago | 0

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Answered

Hi, I am facing difficulty in plotting these functions.

Try this: a = 0 : 0.05 : 10; y = sin(2*pi*a.*(a>5)); figure plot(a, y) grid Experiment to get the result you want.

Hi, I am facing difficulty in plotting these functions.

Try this: a = 0 : 0.05 : 10; y = sin(2*pi*a.*(a>5)); figure plot(a, y) grid Experiment to get the result you want.

7 hours ago | 0

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Answered

How to put together different cases in one MATLAB code?

With this change: alpha= [-1/3, -1/6, 0]; %koeficijent prigušenja <— CREATE VECTOR FOR ‘alpha’ and others to ...

How to put together different cases in one MATLAB code?

With this change: alpha= [-1/3, -1/6, 0]; %koeficijent prigušenja <— CREATE VECTOR FOR ‘alpha’ and others to ...

7 hours ago | 1

Answered

bug? cant change the format of an array variable column

You probably want the Exponent property of the Numeric Ruler class (R2015b and later versions). set(gca, 'Exponent',2) may w...

bug? cant change the format of an array variable column

You probably want the Exponent property of the Numeric Ruler class (R2015b and later versions). set(gca, 'Exponent',2) may w...

9 hours ago | 0

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Answered

Matrix row cell concatenation

That appears to be appropriate, although the loop is not necessary. a = [ 8 1 6 ; 1 2 3 ; 4 5 6 ]; b = mat2cell(a, ones(1,si...

Matrix row cell concatenation

That appears to be appropriate, although the loop is not necessary. a = [ 8 1 6 ; 1 2 3 ; 4 5 6 ]; b = mat2cell(a, ones(1,si...

18 hours ago | 0

Answered

Plotting 3 variable functions (Laplace equation)

You need to create matrices from ‘x’ and ‘y’ using either meshgrid or ndgrid. Then, you can plot the contours. Please re-exa...

Plotting 3 variable functions (Laplace equation)

You need to create matrices from ‘x’ and ‘y’ using either meshgrid or ndgrid. Then, you can plot the contours. Please re-exa...

24 hours ago | 1

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Answered

How to plot the cyclone symbol in a figure?

I am not aware of one, although I have not yet needed to use one. One option is to use the section sign (§) with a text objec...

How to plot the cyclone symbol in a figure?

I am not aware of one, although I have not yet needed to use one. One option is to use the section sign (§) with a text objec...

1 day ago | 0

Answered

How to get time for 50%, 90% and 100% of a graph?

Only some of your records follow the model you describe. For those that do, this works (using the code you posted to get the ...

How to get time for 50%, 90% and 100% of a graph?

Only some of your records follow the model you describe. For those that do, this works (using the code you posted to get the ...

1 day ago | 0

Answered

polar plot to create circular shape with varying radius

Plotting the sine function in a polar plot will produce one circle in the upper half of the polar axes. To get the sort of pl...

polar plot to create circular shape with varying radius

Plotting the sine function in a polar plot will produce one circle in the upper half of the polar axes. To get the sort of pl...

1 day ago | 0

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Answered

How can I measure the average of a signal at specified time points?

Try this: t = ...; % Time Vector s = ...; ...

How can I measure the average of a signal at specified time points?

Try this: t = ...; % Time Vector s = ...; ...

1 day ago | 1

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Answered

Changes matrix size matlab

Use the reshape function, specifically: Out = reshape(A, [], 2)' producing (for the vector you posted): Out = 0 0...

Changes matrix size matlab

Use the reshape function, specifically: Out = reshape(A, [], 2)' producing (for the vector you posted): Out = 0 0...

1 day ago | 0

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Answered

set default font in all figures

See the documentation section on Default Property Values. Note that this is not the same for all MATLAB releases, and changed...

set default font in all figures

See the documentation section on Default Property Values. Note that this is not the same for all MATLAB releases, and changed...

2 days ago | 0

Answered

Finding the nonzero element in a specific row

Select the row, then use find: A = [1 3 0; 2 0 4; 0 7 9] DesiredRow = 2 cix = find(A(DesiredRow,:) ~= 0) so: A = 1...

Finding the nonzero element in a specific row

Select the row, then use find: A = [1 3 0; 2 0 4; 0 7 9] DesiredRow = 2 cix = find(A(DesiredRow,:) ~= 0) so: A = 1...

2 days ago | 0

Answered

Why does Matlab substitute a number in a formula instead of solving it?

The Symbolic Math Toolbox outputs its results as symbolic expressions, unless you ask it to do otherwise. (It assumes you want ...

Why does Matlab substitute a number in a formula instead of solving it?

The Symbolic Math Toolbox outputs its results as symbolic expressions, unless you ask it to do otherwise. (It assumes you want ...

2 days ago | 0

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Answered

Improving Presentation of a Graph

If you want your plots to have a finer resolution with respect to ‘R’, define ‘Rv’ to have more points: Rv = linspace(1, 10, 1...

Improving Presentation of a Graph

If you want your plots to have a finer resolution with respect to ‘R’, define ‘Rv’ to have more points: Rv = linspace(1, 10, 1...

2 days ago | 0

Answered

Harmonic spectrum of the voltage data

Try this: D = dlmread('voltage_u.txt','\t', 4, 0); D = D(1:end-1,1:2); % First Two Co...

Harmonic spectrum of the voltage data

Try this: D = dlmread('voltage_u.txt','\t', 4, 0); D = D(1:end-1,1:2); % First Two Co...

2 days ago | 0

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Answered

What's the best way to solve an equation in this example?

Try this: myFZERO = @(F) fzero(F, 10); % Hard-Coded Initial Estimate a = @(x) x.^2-5; ...

What's the best way to solve an equation in this example?

Try this: myFZERO = @(F) fzero(F, 10); % Hard-Coded Initial Estimate a = @(x) x.^2-5; ...

2 days ago | 2

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Answered

Finding the volume of individual surfaces of a surf plot?

Unfortunately, you did not post your data, so I created some. You will have to adapt this to your data: [X,Y] = meshgrid(1:...

Finding the volume of individual surfaces of a surf plot?

Unfortunately, you did not post your data, so I created some. You will have to adapt this to your data: [X,Y] = meshgrid(1:...

3 days ago | 0

Answered

Is it possible to plot a plot() and area() on same axis

Use the hold function: B57 = rand(1, 100); % Create ‘B57’ y1 = B57; PlotAX1 = axes; ...

Is it possible to plot a plot() and area() on same axis

Use the hold function: B57 = rand(1, 100); % Create ‘B57’ y1 = B57; PlotAX1 = axes; ...

3 days ago | 0

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Answered

Checking whether one row of an array is equal to the rows in a separate array

I would be tempted to use the ismember function with the 'rows' option (or ismembertol with the 'ByRows' option).

Checking whether one row of an array is equal to the rows in a separate array

I would be tempted to use the ismember function with the 'rows' option (or ismembertol with the 'ByRows' option).

3 days ago | 3

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Answered

Issues executing while loop

When I ran the code you posted, the while loop becomes infinite if ‘min(DPnew)’ is negative. In that event, this expression: ...

Issues executing while loop

When I ran the code you posted, the while loop becomes infinite if ‘min(DPnew)’ is negative. In that event, this expression: ...

3 days ago | 0

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Answered

Output of the function conv2 is not the size I expected?

Reverse the order of the arguments (so that the smaller size matrix is first), then use the 'same' shape argument: C = conv2(B...

Output of the function conv2 is not the size I expected?

Reverse the order of the arguments (so that the smaller size matrix is first), then use the 'same' shape argument: C = conv2(B...

3 days ago | 0

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Answered

Calculate difference between two signals

I would compare them by noting that the amplitudes of the peaks vary with respect to the independent variable, similarly for bot...

Calculate difference between two signals

I would compare them by noting that the amplitudes of the peaks vary with respect to the independent variable, similarly for bot...

3 days ago | 0

Answered

Plot of dspesific rows and columns

Importing your file depends on what is in it (numeric only, numeric with text headers, or something else). If you have R2019a o...

Plot of dspesific rows and columns

Importing your file depends on what is in it (numeric only, numeric with text headers, or something else). If you have R2019a o...

3 days ago | 1

Answered

Using Two Model Functions With LSQCUREVFIT

‘Do I need to call one PredCurrFun and the other PredCurrFun2, and LSQCURVEFIT can use both?’ Yes, in separate calls and othe...

Using Two Model Functions With LSQCUREVFIT

‘Do I need to call one PredCurrFun and the other PredCurrFun2, and LSQCURVEFIT can use both?’ Yes, in separate calls and othe...

4 days ago | 0

Answered

dealing with negative indices error

There turned out to be three problelms with your code that I corrected here. The original one was due to your forgetting an o...

dealing with negative indices error

There turned out to be three problelms with your code that I corrected here. The original one was due to your forgetting an o...

4 days ago | 1

Answered

"Glitches" in transfer function

Precision could certainly be a problem, especiall considering the magnitudes of those numbers. (MATLAB retains full internal pr...

"Glitches" in transfer function

Precision could certainly be a problem, especiall considering the magnitudes of those numbers. (MATLAB retains full internal pr...

4 days ago | 0

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Answered

Delete data with some requirements

Try this: D = load('Xsample_data.txt'); X = D(:,1); Y = D(:,2); Zx = D(:,3); Zy = D(:,4); Lvx = (Zx < -2.5) & (Zx > 2...

Delete data with some requirements

Try this: D = load('Xsample_data.txt'); X = D(:,1); Y = D(:,2); Zx = D(:,3); Zy = D(:,4); Lvx = (Zx < -2.5) & (Zx > 2...

4 days ago | 0

| accepted