Question
equations not dipslaying corectly in Matlab Answers window
In the most recent two answers I have posted to Matlab answers (here, here), I have used the equation editor (Sigma, in the Matl...
5 months ago | 1 answer | 0
1
answerAnswered
create a code for butterworth 4th order bandpass filter without Signal Processing Toolbox
@Abhinit, [Edit: Make corections to formulas for a1 and a2 in the lowpass filter. Many of the equations I entrered with the ...
create a code for butterworth 4th order bandpass filter without Signal Processing Toolbox
@Abhinit, [Edit: Make corections to formulas for a1 and a2 in the lowpass filter. Many of the equations I entrered with the ...
5 months ago | 0
Answered
Logistic regression in MATLAB (without Statistics and Machine Learning Toolbox)
@Alexandre Englert, [edit: The equation I entered with LaTeX, in my answer below, is displaying as a fuzzy gray rectangle on my...
Logistic regression in MATLAB (without Statistics and Machine Learning Toolbox)
@Alexandre Englert, [edit: The equation I entered with LaTeX, in my answer below, is displaying as a fuzzy gray rectangle on my...
5 months ago | 0
| accepted
Answered
Solving the Inverse Kinematics problem using a neural network
@po, Since I was unable to run your code, I tried making my own code to solve the inverse kinematics problem of a three-link pl...
Solving the Inverse Kinematics problem using a neural network
@po, Since I was unable to run your code, I tried making my own code to solve the inverse kinematics problem of a three-link pl...
6 months ago | 0
Answered
Help me in Solving PDE
@Muhammad Fahim, [Edit: fix typos (none in code).] Write the finite difference equations and solve it explicitly. This approac...
Help me in Solving PDE
@Muhammad Fahim, [Edit: fix typos (none in code).] Write the finite difference equations and solve it explicitly. This approac...
6 months ago | 0
| accepted
Answered
How to color system of PDEs with two population
@Neda, Using my code from the comment above, we can run the rest of your code: r=(0:0.2:10)'; Nr=length(r); theta=0:pi/36:2*p...
How to color system of PDEs with two population
@Neda, Using my code from the comment above, we can run the rest of your code: r=(0:0.2:10)'; Nr=length(r); theta=0:pi/36:2*p...
6 months ago | 0
| accepted
Answered
time Autocorrelation of horizontal velocity in PIV
@sunando, [Edit: Add example. Fix typos (none in the code).] [Edit 2: Add details to the explanation of how to change the hor...
time Autocorrelation of horizontal velocity in PIV
@sunando, [Edit: Add example. Fix typos (none in the code).] [Edit 2: Add details to the explanation of how to change the hor...
6 months ago | 0
Answered
Is there a way to test the range of the parameters sigma and tau where my model remains stable?
@Christopher, One way to measure stability in your simulation is to compute the coefficient of variation (ratio of standard dev...
Is there a way to test the range of the parameters sigma and tau where my model remains stable?
@Christopher, One way to measure stability in your simulation is to compute the coefficient of variation (ratio of standard dev...
8 months ago | 0
Answered
2d plot with colormap behind
@Kaylie, Here is a script that makes six curves that are similar to the six curves in your figures. It plots each curve with a...
2d plot with colormap behind
@Kaylie, Here is a script that makes six curves that are similar to the six curves in your figures. It plots each curve with a...
8 months ago | 0
Answered
What is wrong with my ankle joint moment estimation?
@Tomaszzz, I agree with you that the early peak in your calculated ankle moment is anomalous and probably indicates a problem i...
What is wrong with my ankle joint moment estimation?
@Tomaszzz, I agree with you that the early peak in your calculated ankle moment is anomalous and probably indicates a problem i...
8 months ago | 2
| accepted
Answered
making the graphic smaller
@Cansu, Matlab functions exportgraphics() and print() allow you to specify the size of the figure that is created. You wrote "...
making the graphic smaller
@Cansu, Matlab functions exportgraphics() and print() allow you to specify the size of the figure that is created. You wrote "...
8 months ago | 0
Answered
how to validate mscohere?
@CM, You say there are two time domain plots, but I see three. Each of the three time domain plots shows an input and an outpu...
how to validate mscohere?
@CM, You say there are two time domain plots, but I see three. Each of the three time domain plots shows an input and an outpu...
8 months ago | 1
| accepted
Answered
Remove echo (convolution) from an .mp3 audio file
@Valeria de los Angeles, I recommend using the autocorrelation function to estimate the echo effects, as @Walter Roberson said....
Remove echo (convolution) from an .mp3 audio file
@Valeria de los Angeles, I recommend using the autocorrelation function to estimate the echo effects, as @Walter Roberson said....
8 months ago | 0
Answered
Issue with DAQ rms measurement variation with frequency
@Aaron Borgman, How exactly did you make these plots? PLease explain your sampling protocol and calculations in more detail. ...
Issue with DAQ rms measurement variation with frequency
@Aaron Borgman, How exactly did you make these plots? PLease explain your sampling protocol and calculations in more detail. ...
8 months ago | 0
Answered
How to solve a bvp PDE with split domain?
@Abdelrahman, Charles Peskin developed a method for handling moving boundaries in a fluid flow problem. Here's a link to one of...
How to solve a bvp PDE with split domain?
@Abdelrahman, Charles Peskin developed a method for handling moving boundaries in a fluid flow problem. Here's a link to one of...
8 months ago | 1
Answered
Spatial filtering of cylindrical data
@Jim McIntyre, I think filtfilt() is a reasonable idea if you do what you said, which is add a wrap-around from the other part ...
Spatial filtering of cylindrical data
@Jim McIntyre, I think filtfilt() is a reasonable idea if you do what you said, which is add a wrap-around from the other part ...
8 months ago | 0
| accepted
Answered
how to solve 2DOF linear time variant differential equations in matlab with non-diagonal mass, stiffness and damping matrixes
@Elyar Ghaffarian Dallali, @Torsten has given a great answer with plots. Here is another way of looking at the problem - which ...
how to solve 2DOF linear time variant differential equations in matlab with non-diagonal mass, stiffness and damping matrixes
@Elyar Ghaffarian Dallali, @Torsten has given a great answer with plots. Here is another way of looking at the problem - which ...
8 months ago | 1
Answered
Enhancing Graph Colorization for Visualizations in MATLAB
@salim, That looks like the hsv colormap. F = @(x,t)real(-0.7602345236*1i*sqrt(2) * csch(0.05376349*t - x) * exp(2.31182795*1i...
Enhancing Graph Colorization for Visualizations in MATLAB
@salim, That looks like the hsv colormap. F = @(x,t)real(-0.7602345236*1i*sqrt(2) * csch(0.05376349*t - x) * exp(2.31182795*1i...
8 months ago | 1
Answered
how to determine the wavelengths of an fft of a non-dimensional sequence
@Andreas Baas, I agree with tyhe points made by @Matt J and @David Goodmanson. When the interval between samples (which could...
how to determine the wavelengths of an fft of a non-dimensional sequence
@Andreas Baas, I agree with tyhe points made by @Matt J and @David Goodmanson. When the interval between samples (which could...
8 months ago | 0
| accepted
Answered
We have tetrahedra mesh we went to extract a sphere from this mesh and adabting the mesh
@Maroua Guenaoua, [Edit: Upload modified version of script - see comment below.] A modified version of your script is attached...
We have tetrahedra mesh we went to extract a sphere from this mesh and adabting the mesh
@Maroua Guenaoua, [Edit: Upload modified version of script - see comment below.] A modified version of your script is attached...
8 months ago | 0
Submitted
Analyze triangulation
This function returns information about a triangulation, which may be useful when setting up a partial differential equation pro...
8 months ago | 0 downloads |
Answered
We have tetrahedra mesh we went to extract a sphere from this mesh and adabting the mesh
@Maroua Guenaoua, I had to fixthe filename. You attached file nodes10.txt, but your code calls nodes10.dat. After I fixed tha...
We have tetrahedra mesh we went to extract a sphere from this mesh and adabting the mesh
@Maroua Guenaoua, I had to fixthe filename. You attached file nodes10.txt, but your code calls nodes10.dat. After I fixed tha...
9 months ago | 0
Answered
SVC CONTROL(detailed model)
@Xristina, The example description says "one 109-Mvar thyristor-controlled reactor bank (TCR) and three 94-Mvar thyristor-switc...
SVC CONTROL(detailed model)
@Xristina, The example description says "one 109-Mvar thyristor-controlled reactor bank (TCR) and three 94-Mvar thyristor-switc...
9 months ago | 0
| accepted
Answered
Does anyone know how to use an IF statement with ODE's? I am trying to create an IF statement sigma > 0 , tau > 0 if dx(3,1) > 0, dx(1,1) > 0 and sigma = 0 , tau = 0 otherwise
@Christopher, [edit: fix spelling error; no changes to code] [Edit: Change "./" to "/" inside function odefcn(), since "./" is...
Does anyone know how to use an IF statement with ODE's? I am trying to create an IF statement sigma > 0 , tau > 0 if dx(3,1) > 0, dx(1,1) > 0 and sigma = 0 , tau = 0 otherwise
@Christopher, [edit: fix spelling error; no changes to code] [Edit: Change "./" to "/" inside function odefcn(), since "./" is...
9 months ago | 0
Answered
Inferring real-world coordinates from pixel positions
@Francesco, The projection equation from world (x,y,z) to image (u,v) is We can estimate A from the control points: % Contr...
Inferring real-world coordinates from pixel positions
@Francesco, The projection equation from world (x,y,z) to image (u,v) is We can estimate A from the control points: % Contr...
9 months ago | 1
| accepted
Answered
3D plot: draw xy grid line on the middle of the plot box
@Lloyd Bumm, Try grid3() on the File Exchange., by @Hristo Zhivomirov. x=-2:0.2:2; y=-2:0.2:2; [X,Y]=meshgrid(x,y); Z=-2+4*e...
3D plot: draw xy grid line on the middle of the plot box
@Lloyd Bumm, Try grid3() on the File Exchange., by @Hristo Zhivomirov. x=-2:0.2:2; y=-2:0.2:2; [X,Y]=meshgrid(x,y); Z=-2+4*e...
9 months ago | 0
Answered
What is the purpose of the input argument 'Tolerance' in the risetime function?
@Samuel Foster, Here's an example of tolerance making a difference: t=0:999; x=(mod(t/100,2)>=1 & mod(t/100,6)<5)+0.8*(mod(t/...
What is the purpose of the input argument 'Tolerance' in the risetime function?
@Samuel Foster, Here's an example of tolerance making a difference: t=0:999; x=(mod(t/100,2)>=1 & mod(t/100,6)<5)+0.8*(mod(t/...
9 months ago | 0
| accepted
Answered
Bivariate colorscale for color plot
Another approach is to map f in one color and map g in another color, then combine them. x=-10:0.5:10; y=-10:0.5:10; [X,Y]=mes...
Bivariate colorscale for color plot
Another approach is to map f in one color and map g in another color, then combine them. x=-10:0.5:10; y=-10:0.5:10; [X,Y]=mes...
9 months ago | 0
Answered
H1 H2 Hv estimators all the same
@Riccardo, [Edit one sentence fo rclarity. No changes to code.] When you get coherence=1, it is an indicator that you have not...
H1 H2 Hv estimators all the same
@Riccardo, [Edit one sentence fo rclarity. No changes to code.] When you get coherence=1, it is an indicator that you have not...
9 months ago | 0
| accepted
Question
3d plot with +Y up and +Z left
When I plot a side view of a 3D object, with +Y axis up and +Z pointing left, the axis labels are in the wrong place or absent. ...
10 months ago | 1 answer | 0