12.437 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

Optimizing parameters in ODE

This is a simple, separable differential equation that you can likely solve by hand. Using the Symbolic Math Toolbox: syms ...

Optimizing parameters in ODE

This is a simple, separable differential equation that you can likely solve by hand. Using the Symbolic Math Toolbox: syms ...

circa 19 ore ago | 0

Answered

add label to a contour when when multiples plots

They appear to be plotted on the same set of coordinate matrices. One option is to use different line colours (and other variat...

add label to a contour when when multiples plots

They appear to be plotted on the same set of coordinate matrices. One option is to use different line colours (and other variat...

circa 21 ore ago | 0

Answered

How to use format spec to read in Textscan?

I doubt you can insert the ‘e’ as part of the data. One option: x = sscanf('-2.554-4','%f') y = x(1).*10^x(2) producing: ...

How to use format spec to read in Textscan?

I doubt you can insert the ‘e’ as part of the data. One option: x = sscanf('-2.554-4','%f') y = x(1).*10^x(2) producing: ...

circa 21 ore ago | 0

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Answered

I'm not getting table

It works when I run it, and with: q = which('table.txt', '-all') type(q{:}) produces: t x(1) x(2) ----...

I'm not getting table

It works when I run it, and with: q = which('table.txt', '-all') type(q{:}) produces: t x(1) x(2) ----...

circa 22 ore ago | 0

Answered

Put title for each subplot

Remove the single quotes: title (Titleindex(i)); and spell the name correctly in both the variable and references to it!

Put title for each subplot

Remove the single quotes: title (Titleindex(i)); and spell the name correctly in both the variable and references to it!

circa 22 ore ago | 1

| accepted

Answered

str2num not working on array

It returns an empty array because you apparently ask for a character array (for example ‘Red’) as the first input. That is not ...

str2num not working on array

It returns an empty array because you apparently ask for a character array (for example ‘Red’) as the first input. That is not ...

circa 23 ore ago | 0

Answered

Difference between two plots of this final output figure??

The system being modeled Simulate Response to Square Wave is a 1-input, 2=output (SIMO) system, presenting the same input to bot...

Difference between two plots of this final output figure??

The system being modeled Simulate Response to Square Wave is a 1-input, 2=output (SIMO) system, presenting the same input to bot...

1 giorno ago | 1

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Answered

Related to calculate average within particular range of graph

Use the negative of your signal (essentially flipping it upside-down) so the sharp dips are now peaks. Then use either findpeak...

Related to calculate average within particular range of graph

Use the negative of your signal (essentially flipping it upside-down) so the sharp dips are now peaks. Then use either findpeak...

1 giorno ago | 0

| accepted

Answered

problem in taking the step response of a function

Your ‘ matrix’ is actually a scalar: -0.022, that will evaluate to in your state space realisation. This produces a typical de...

problem in taking the step response of a function

Your ‘ matrix’ is actually a scalar: -0.022, that will evaluate to in your state space realisation. This produces a typical de...

1 giorno ago | 0

Answered

How to solve a differential equation using data from experiment?

Since you are not integrating the differential equation, this is a simple nonilinear parameter estimation problem. Try this: ...

How to solve a differential equation using data from experiment?

Since you are not integrating the differential equation, this is a simple nonilinear parameter estimation problem. Try this: ...

2 giorni ago | 0

Answered

How a solution depends on a variable

One approach: gammav = linspace(0.5, 1, 10); for k = 1:numel(gammav) UE{k} = Explicit(S,sigma,r,T,M,K,gammav(k),N); end...

How a solution depends on a variable

One approach: gammav = linspace(0.5, 1, 10); for k = 1:numel(gammav) UE{k} = Explicit(S,sigma,r,T,M,K,gammav(k),N); end...

2 giorni ago | 0

| accepted

Answered

Normalize by using zero mean and unit variance

If you have R2018a or later, use the normalize function. Another option is zscore.

Normalize by using zero mean and unit variance

If you have R2018a or later, use the normalize function. Another option is zscore.

2 giorni ago | 1

| accepted

Answered

I have data points for different x and y points in excel and am trying to create a 3D contour plot of this data

I have absolutely no idea what you want. Try this: D = xlsread('excel for aerolab3.xlsx'); y1 = D(2:12, 2:end); y2 = D(16...

I have data points for different x and y points in excel and am trying to create a 3D contour plot of this data

I have absolutely no idea what you want. Try this: D = xlsread('excel for aerolab3.xlsx'); y1 = D(2:12, 2:end); y2 = D(16...

2 giorni ago | 0

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Answered

Shifting Baselines of Raman Spectra

This is an interesting problem! It took me a while to figure out the correct approach, however it is deceptively simple, and ...

Shifting Baselines of Raman Spectra

This is an interesting problem! It took me a while to figure out the correct approach, however it is deceptively simple, and ...

3 giorni ago | 0

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Answered

How can I interpolate data with the function ScatteredInterpolant (or else) within the boundaries of the input data only?

Specify 'ExtrapolationMethod' as 'none'.

How can I interpolate data with the function ScatteredInterpolant (or else) within the boundaries of the input data only?

Specify 'ExtrapolationMethod' as 'none'.

3 giorni ago | 0

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Answered

Creating a vector out of variables

Use the format function to change the way they are displayed: A = 1/(10^(-6)); B = 22^(1/4); C = 4^(3+2); format long E ...

Creating a vector out of variables

Use the format function to change the way they are displayed: A = 1/(10^(-6)); B = 22^(1/4); C = 4^(3+2); format long E ...

3 giorni ago | 0

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Answered

Remove NaN inside a loop cycle

Try this: B(i,:) = X(i,~isnan(X(i,:)));

Remove NaN inside a loop cycle

Try this: B(i,:) = X(i,~isnan(X(i,:)));

3 giorni ago | 0

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Answered

How to upsample an RF signal by a non-integer factor.

The resample function allows ‘p’ and ‘q’ to be any integers, so even an irrational number for the sampling rate. x = randn(1,...

How to upsample an RF signal by a non-integer factor.

The resample function allows ‘p’ and ‘q’ to be any integers, so even an irrational number for the sampling rate. x = randn(1,...

3 giorni ago | 0

Answered

ODE45 wont run, just says "error"?

You have two problems: First, your system has two differential equations, so you must have two initial conditions: ic = [0 1...

ODE45 wont run, just says "error"?

You have two problems: First, your system has two differential equations, so you must have two initial conditions: ic = [0 1...

3 giorni ago | 0

| accepted

Answered

Plot for specific vibrational heat

Use element-wise operations: C_vv=((R*theta_v^2*(exp(theta_v./T)))./(((exp(theta_v./T))-1).^2.*T.^2)); ...

Plot for specific vibrational heat

Use element-wise operations: C_vv=((R*theta_v^2*(exp(theta_v./T)))./(((exp(theta_v./T))-1).^2.*T.^2)); ...

3 giorni ago | 0

| accepted

Answered

Optimisation of a filter knowing input and output

The System identification Toolbox is dedicated to problems like this. See if the Signal Processing Toolbox invfreqz function ...

Optimisation of a filter knowing input and output

The System identification Toolbox is dedicated to problems like this. See if the Signal Processing Toolbox invfreqz function ...

4 giorni ago | 0

Answered

Why will these plots not plot on the same graph?

Each plot erases the plot before it. To overcome that, use the hold function: subplot(4,4,i) plot(spdnpwr(1:Astop,x)...

Why will these plots not plot on the same graph?

Each plot erases the plot before it. To overcome that, use the hold function: subplot(4,4,i) plot(spdnpwr(1:Astop,x)...

4 giorni ago | 0

Answered

Find two ways to create a 3 x 5 matrix with all values equal to 100 (Hint: use ones and zeros).

It is referring you to the ones function and the zeros function. Please look them up in the documentation.

Find two ways to create a 3 x 5 matrix with all values equal to 100 (Hint: use ones and zeros).

It is referring you to the ones function and the zeros function. Please look them up in the documentation.

4 giorni ago | 0

Answered

How can I separate the two fprintf

Add a ‘\n’ newline character to the end of each line: fprintf('A new location was found.Enter an ID for it:''NE051\n'); ...

How can I separate the two fprintf

Add a ‘\n’ newline character to the end of each line: fprintf('A new location was found.Enter an ID for it:''NE051\n'); ...

4 giorni ago | 0

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Answered

How can I add a matrix into another matrix

If you want to insert ‘B’ somewhere other than as the first or last row of ‘A’: A = rand(16,5); B = rand(1, 5); newA = zeros...

How can I add a matrix into another matrix

If you want to insert ‘B’ somewhere other than as the first or last row of ‘A’: A = rand(16,5); B = rand(1, 5); newA = zeros...

4 giorni ago | 0

Answered

My Matlab filterDesigner is exhibiting errors when typed on the command line

In your Command Window or a script, type: ver to verify that you have the Signal Processing Toolbox installed. If you do, ...

My Matlab filterDesigner is exhibiting errors when typed on the command line

In your Command Window or a script, type: ver to verify that you have the Signal Processing Toolbox installed. If you do, ...

4 giorni ago | 0

Answered

Velocity cumtrapz or gradient

The gradient function calculates the approximate numerical derivative of a vector, and the cumtrapz function calculates the appr...

Velocity cumtrapz or gradient

The gradient function calculates the approximate numerical derivative of a vector, and the cumtrapz function calculates the appr...

4 giorni ago | 1

| accepted

Answered

How to do a nonlinear fit using least squares

This is actually a linear problem, so a linear approximation will estimate the parameters correctly: R = 8.314462; ...

How to do a nonlinear fit using least squares

This is actually a linear problem, so a linear approximation will estimate the parameters correctly: R = 8.314462; ...

5 giorni ago | 1

| accepted

Answered

Finding matrix values associated with plot point

One approach: A = rand(10,2); A(4,:) = [75 0.995]; Lrow = ismembertol(A, [75 0.995], 0.01, 'ByRows',1) RowNr = find(Lrow)...

Finding matrix values associated with plot point

One approach: A = rand(10,2); A(4,:) = [75 0.995]; Lrow = ismembertol(A, [75 0.995], 0.01, 'ByRows',1) RowNr = find(Lrow)...

5 giorni ago | 0