답변 있음

looking for an efficient way to activate all fprintf in the function

Probably not what you are looking for, but a quick way may be to just do a search and replace all (i.e., search for: "fprintf" r...

looking for an efficient way to activate all fprintf in the function

Probably not what you are looking for, but a quick way may be to just do a search and replace all (i.e., search for: "fprintf" r...

대략 12년 전 | 0

답변 있음

How to manipulate Plot Legend to show markers and colours seperatly?

It can be done... you will have to do some finagling, but it can be done. Here is an example where we have 2 different datasets ...

How to manipulate Plot Legend to show markers and colours seperatly?

It can be done... you will have to do some finagling, but it can be done. Here is an example where we have 2 different datasets ...

대략 12년 전 | 8

답변 있음

How to check if a file of certain type exists in folder?

You could try doing something like: dir_struct = dir( fullfile(your_path,'*pdf') ); if numel(dir_struct) == 0 % then ...

How to check if a file of certain type exists in folder?

You could try doing something like: dir_struct = dir( fullfile(your_path,'*pdf') ); if numel(dir_struct) == 0 % then ...

대략 12년 전 | 0

답변 있음

Plotting lognormal data on this type of graph?

The key ended up being *norminv*. Here is an example output of the program I made (see below for *probit* function): >> pro...

Plotting lognormal data on this type of graph?

The key ended up being *norminv*. Here is an example output of the program I made (see below for *probit* function): >> pro...

대략 12년 전 | 0

| 수락됨

질문

Plotting lognormal data on this type of graph?

I would like to plot data on a graph similar to that illustrated in the figure below (except it is upside-down from my conventio...

대략 12년 전 | 답변 수: 2 | 0

답변 있음

I have a rather large matrix. The data was sampled at 100 Hz. I want to the data to look like it was sampled at 5 Hz

Use *resample* - This is an example of why you may not want to take every Nth amplitude: <<https://lh5.googleusercontent.com/...

I have a rather large matrix. The data was sampled at 100 Hz. I want to the data to look like it was sampled at 5 Hz

Use *resample* - This is an example of why you may not want to take every Nth amplitude: <<https://lh5.googleusercontent.com/...

대략 12년 전 | 0

답변 있음

use FFT in matlab and get phase plot

Here are the frequencies associated with the output from FFT: Nt = % Number of time samples Fs = ...

use FFT in matlab and get phase plot

Here are the frequencies associated with the output from FFT: Nt = % Number of time samples Fs = ...

대략 12년 전 | 0

| 수락됨

답변 있음

Area of a Spectrum

The area under your curve should just be: N = numel(x); dt = 1/fs; df = fs/N; y = fft(x)*dt; area_y = sum(abs(y))*d...

Area of a Spectrum

The area under your curve should just be: N = numel(x); dt = 1/fs; df = fs/N; y = fft(x)*dt; area_y = sum(abs(y))*d...

12년 초과 전 | 0

| 수락됨

답변 있음

How to get back complete signal after doing IFFT

Can you provide an example of how you are performing the fft? Something like: a = your_dataset_in_the_time_domain; size_a ...

How to get back complete signal after doing IFFT

Can you provide an example of how you are performing the fft? Something like: a = your_dataset_in_the_time_domain; size_a ...

12년 초과 전 | 0

답변 있음

ifft and fft problem

Did you mean to use "fs_s" instead of "f_s" here: h1_s_hat = abs(fs_s.*ifft(ifftshift(h1_s_FT))); I guess that's why you...

ifft and fft problem

Did you mean to use "fs_s" instead of "f_s" here: h1_s_hat = abs(fs_s.*ifft(ifftshift(h1_s_FT))); I guess that's why you...

12년 초과 전 | 0

| 수락됨

답변 있음

[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)

I kind of wish that when we scrolled through the answers to questions (especially when there are many "answers" like this one), ...

[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)

I kind of wish that when we scrolled through the answers to questions (especially when there are many "answers" like this one), ...

12년 초과 전 | 0

답변 있음

Is there a built-in function that determines whether X/Y coordinates give valid polygon?

My attempt: % Assume polygon is valid answer = 1; % Set tolerance tol = 0.001; % Random set...

Is there a built-in function that determines whether X/Y coordinates give valid polygon?

My attempt: % Assume polygon is valid answer = 1; % Set tolerance tol = 0.001; % Random set...

12년 초과 전 | 0

질문

Is there a built-in function that determines whether X/Y coordinates give valid polygon?

If I have a vector of X-coordinates and a vector of Y-coordinates, is there a function that determines whether a valid polygon i...

12년 초과 전 | 답변 수: 3 | 1

답변 있음

How do you centre your plot at '0' on the X-axis after performing a Fourier transform?

*fftshift* might be what you are looking for. Does this example help? dt = 0.1; % Fs = 1/dt; N = 16; t = (0:N-1)*dt; ...

How do you centre your plot at '0' on the X-axis after performing a Fourier transform?

*fftshift* might be what you are looking for. Does this example help? dt = 0.1; % Fs = 1/dt; N = 16; t = (0:N-1)*dt; ...

12년 초과 전 | 0

답변 있음

how is a Shock response spectrum estimated

You might take a look at this FEX submission: <http://www.mathworks.com/matlabcentral/fileexchange/7398-shock-response-spectr...

how is a Shock response spectrum estimated

You might take a look at this FEX submission: <http://www.mathworks.com/matlabcentral/fileexchange/7398-shock-response-spectr...

12년 초과 전 | 0

| 수락됨

답변 있음

2D spectral energy density using fft2 - energy in spatial domain unequal to that in wavenumber domain

*[EDIT 7/06]* M=8;N=16; N=8;M=16; dx=0.1;dy=0.2; f = randn(M,N); % Energy in time domain energy_f = sum(sum(f.^2...

2D spectral energy density using fft2 - energy in spatial domain unequal to that in wavenumber domain

*[EDIT 7/06]* M=8;N=16; N=8;M=16; dx=0.1;dy=0.2; f = randn(M,N); % Energy in time domain energy_f = sum(sum(f.^2...

12년 초과 전 | 1

| 수락됨

답변 있음

How can I choose a subset of k points the farthest apart?

Added a few more tests (including your latest) and added your data (instead of just random dataset), which may be of interest. R...

How can I choose a subset of k points the farthest apart?

Added a few more tests (including your latest) and added your data (instead of just random dataset), which may be of interest. R...

12년 초과 전 | 0

답변 있음

Simple question for GUI

Also wanted to add a good resource for those who want to learn how to program a variety of things in Matlab GUIs: <http://www...

Simple question for GUI

Also wanted to add a good resource for those who want to learn how to program a variety of things in Matlab GUIs: <http://www...

12년 초과 전 | 0

| 수락됨

답변 있음

Bandpass Filter By Using Butter

Okan - Ambient noise is like random noise... the frequency domain response (if you were to plot the abs of the frequency domain ...

Bandpass Filter By Using Butter

Okan - Ambient noise is like random noise... the frequency domain response (if you were to plot the abs of the frequency domain ...

12년 초과 전 | 0

답변 있음

How can I choose a subset of k points the farthest apart?

Went with a "simple" way - tried to maximize the sum of the distances between each point in the sub-set of "n" below (similar to...

How can I choose a subset of k points the farthest apart?

Went with a "simple" way - tried to maximize the sum of the distances between each point in the sub-set of "n" below (similar to...

12년 초과 전 | 0

답변 있음

Legend Problem

Matlab is only doing what you tell it to. One of the places where you define your figure, you have your "hold on" just after you...

Legend Problem

Matlab is only doing what you tell it to. One of the places where you define your figure, you have your "hold on" just after you...

12년 초과 전 | 0

답변 있음

[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)

Has someone already addressed the change from having our most recent answers listed first to (now) where our oldest answers are ...

[DISCONTINUED] MATLAB Answers Wish-list #2 (and bug reports)

Has someone already addressed the change from having our most recent answers listed first to (now) where our oldest answers are ...

12년 초과 전 | 1

답변 있음

FFT

Your first amplitude represents 0 frequency. When your data has 0 mean, your first amplitude should also be 0.

FFT

Your first amplitude represents 0 frequency. When your data has 0 mean, your first amplitude should also be 0.

12년 초과 전 | 0

답변 있음

derivative using FFT properties

Based on the website below: <http://www.cl.cam.ac.uk/teaching/2000/ContMaths/JGD-notes/node11.html> I believe you would do...

derivative using FFT properties

Based on the website below: <http://www.cl.cam.ac.uk/teaching/2000/ContMaths/JGD-notes/node11.html> I believe you would do...

12년 초과 전 | 0

| 수락됨

답변 있음

cycles/pixel to cycels/degree

See this link: <http://www.cogs.susx.ac.uk/courses/acv/matlab_demos/fft_image_demo.html> About half way down: F = fft...

cycles/pixel to cycels/degree

See this link: <http://www.cogs.susx.ac.uk/courses/acv/matlab_demos/fft_image_demo.html> About half way down: F = fft...

12년 초과 전 | 0

답변 있음

FFT of an image

See my answer here for a coded up description of what the 2D Fourier transform does using a random 2D image as an example (shoul...

FFT of an image

See my answer here for a coded up description of what the 2D Fourier transform does using a random 2D image as an example (shoul...

12년 초과 전 | 1

| 수락됨

답변 있음

why real part of fft (exp(at)) is negative in some parts in contrary to analytical calculation of fft(exp(at))?

Try plotting the *abs* result from FFT. Basically, you will not get a purely real, all positive frequency spectrum unless your t...

why real part of fft (exp(at)) is negative in some parts in contrary to analytical calculation of fft(exp(at))?

Try plotting the *abs* result from FFT. Basically, you will not get a purely real, all positive frequency spectrum unless your t...

12년 초과 전 | 0

답변 있음

Area of a triangle

How about *polyarea*? >> x = [0, 0, 4]; >> y = [0, 3, 0]; >> area1 = polyarea(x,y) area1 = 6 >> area2 =...

Area of a triangle

How about *polyarea*? >> x = [0, 0, 4]; >> y = [0, 3, 0]; >> area1 = polyarea(x,y) area1 = 6 >> area2 =...

12년 초과 전 | 2

| 수락됨

답변 있음

fft2: Frequency and wavenumber

Take a look at my post here for an idea of what is output from FFT2: <http://www.mathworks.com/matlabcentral/answers/24965-ff...

fft2: Frequency and wavenumber

Take a look at my post here for an idea of what is output from FFT2: <http://www.mathworks.com/matlabcentral/answers/24965-ff...

12년 초과 전 | 0

| 수락됨