Answered
How can I find the power factor when my system contains harmonics?
@Chonlasit, When you have harmonics, the power factor for a single-phase system, and for a 3-phase system with three identical ...
How can I find the power factor when my system contains harmonics?
@Chonlasit, When you have harmonics, the power factor for a single-phase system, and for a 3-phase system with three identical ...
2 months ago | 0
| accepted
Answered
Can't understand why Pwelch claims window is larger than input signal
@Jude, [Edit: correct spelling in my comments.) You need to use the transpose of the data array. pwelch() finds the spectrum ...
Can't understand why Pwelch claims window is larger than input signal
@Jude, [Edit: correct spelling in my comments.) You need to use the transpose of the data array. pwelch() finds the spectrum ...
2 months ago | 1
| accepted
Answered
Simulating a high performance, very compact optical distance measurement sensors for applications such as ADAS
@idris, "Does mathworks provide such a functionality of simulating a ladar that is edge emitting, and having 905nm, single stri...
Simulating a high performance, very compact optical distance measurement sensors for applications such as ADAS
@idris, "Does mathworks provide such a functionality of simulating a ladar that is edge emitting, and having 905nm, single stri...
2 months ago | 0
| accepted
Answered
model reduction from a database created with xfoil
@Marko, I do not think proper orthogonal decomposition or principal component analysis will be useful for this problem. To do p...
model reduction from a database created with xfoil
@Marko, I do not think proper orthogonal decomposition or principal component analysis will be useful for this problem. To do p...
2 months ago | 0
Answered
Can anyone help me in understanding of deconvolution based on toeplitz matrix?
@Junjie Zhao, Here is an examle, using d=[1 2 3 4 5], which you suggested. Since d has length 5, then the convolution d*w = p (...
Can anyone help me in understanding of deconvolution based on toeplitz matrix?
@Junjie Zhao, Here is an examle, using d=[1 2 3 4 5], which you suggested. Since d has length 5, then the convolution d*w = p (...
2 months ago | 0
Answered
how to heat map encode a smoothed line of sparse time-series data
@hxen, [Edit: Add label to colorbar.] The script below plots the raw data and smoothly interpolated data, colored by speed. Yo...
how to heat map encode a smoothed line of sparse time-series data
@hxen, [Edit: Add label to colorbar.] The script below plots the raw data and smoothly interpolated data, colored by speed. Yo...
2 months ago | 1
| accepted
Answered
Question Regarding Baseline Correction in Time-Frequency Analysis of Auditory MMN Data
@Elaine, [Edit: fix spelling errors] I understand that you want to do time-frequency analysis on EEG data evoked by auditory s...
Question Regarding Baseline Correction in Time-Frequency Analysis of Auditory MMN Data
@Elaine, [Edit: fix spelling errors] I understand that you want to do time-frequency analysis on EEG data evoked by auditory s...
2 months ago | 0
Answered
QRS area calculation from ECG
@Gültekin Günhan, [Edit: Add a citation of, and link to, the original Kors paper. The data and matrix and code are unchanged.]...
QRS area calculation from ECG
@Gültekin Günhan, [Edit: Add a citation of, and link to, the original Kors paper. The data and matrix and code are unchanged.]...
3 months ago | 0
Answered
Converting spectrum.pwelch//psd to equivalent pwelch call
@Ron Fowler, The defaults for spectrum.welch are listed here. The defaults for pwelch are listed toward the bottom of this p...
Converting spectrum.pwelch//psd to equivalent pwelch call
@Ron Fowler, The defaults for spectrum.welch are listed here. The defaults for pwelch are listed toward the bottom of this p...
3 months ago | 0
Answered
Motion correction for foot movement in an MRI foot
@Trixie, Please upload a subset of the data array, im4d. For example, the first 10 time points, i.e. a 128x64x51x10 array. Mayb...
Motion correction for foot movement in an MRI foot
@Trixie, Please upload a subset of the data array, im4d. For example, the first 10 time points, i.e. a 128x64x51x10 array. Mayb...
3 months ago | 0
Submitted
Random numbers with custom distrbution
myRand returns random numbers with a custom distribution specified as a histogram.
3 months ago | 0 downloads |
Answered
Can we specify an "outward" direction to normal obtained from pcfitplane approach?
@Manish Kumar Nayak, I agree with @Matt J. To be more specific: Assume n is the normal vector returned by pcfitplane. If yo...
Can we specify an "outward" direction to normal obtained from pcfitplane approach?
@Manish Kumar Nayak, I agree with @Matt J. To be more specific: Assume n is the normal vector returned by pcfitplane. If yo...
3 months ago | 0
| accepted
Answered
Find the ratio or difference spectra as time progresses
There is a large literature on transfer funciton estimation by taking the ratio of two complex spectra. This usually involves th...
Find the ratio or difference spectra as time progresses
There is a large literature on transfer funciton estimation by taking the ratio of two complex spectra. This usually involves th...
3 months ago | 1
Answered
How to calculate HF/LF from ECG data
@拓実, The ratio of power in the low frequency band (defined as 0.04–0.15 Hz) to the high-frequency band (defined as 0.15–0.40 Hz...
How to calculate HF/LF from ECG data
@拓実, The ratio of power in the low frequency band (defined as 0.04–0.15 Hz) to the high-frequency band (defined as 0.15–0.40 Hz...
3 months ago | 0
Answered
Plotting deflection of beam using macaulay functions
@Benjamin, You wrote: "An example of this function would be: slope=(1/(E*I))*(146.5*<x>^2+315<x-0.12>^2-70.24*,x.^3)" I inter...
Plotting deflection of beam using macaulay functions
@Benjamin, You wrote: "An example of this function would be: slope=(1/(E*I))*(146.5*<x>^2+315<x-0.12>^2-70.24*,x.^3)" I inter...
3 months ago | 0
Answered
How to plot one curve and change color according to value
@Fritz Weld, [Edit: clean up code a lttle bit.] x = linspace(0,10); y = sin(3*x).*exp(0.5*x); y1=zeros(size(y)); y2=y1; % i...
How to plot one curve and change color according to value
@Fritz Weld, [Edit: clean up code a lttle bit.] x = linspace(0,10); y = sin(3*x).*exp(0.5*x); y1=zeros(size(y)); y2=y1; % i...
3 months ago | 0
Answered
Random Number Generation with Parameters
@Demosthenis Kasastogiannis, I share @John D'Errico's question. I am not sure I understand your reply to his question. My under...
Random Number Generation with Parameters
@Demosthenis Kasastogiannis, I share @John D'Errico's question. I am not sure I understand your reply to his question. My under...
3 months ago | 0
| accepted
Answered
How to calculate average frequency and a frequency over time graph all in Matlab?
@Ugonne, [edit: I adjusted my discussion at the bottom slightly. No changes to code or plots.] I made a recording with my comp...
How to calculate average frequency and a frequency over time graph all in Matlab?
@Ugonne, [edit: I adjusted my discussion at the bottom slightly. No changes to code or plots.] I made a recording with my comp...
3 months ago | 0
Answered
How to datasample exponential data without losing the exponential decay?
@SARA CACCIATO SALCEDO, @Star Strider and @Les Beckham have provided excellent suggestions. You want a matrix that is 400x1000...
How to datasample exponential data without losing the exponential decay?
@SARA CACCIATO SALCEDO, @Star Strider and @Les Beckham have provided excellent suggestions. You want a matrix that is 400x1000...
3 months ago | 2
Answered
Good evening, we have a point cloud and have applied an first rotation to align the point cloud along the y-axis. Now we have a problem with a second rotation
@Alessandro, You can find the directions of the principal axes by eigenvalue decomposition of the covariance matrix of the poin...
Good evening, we have a point cloud and have applied an first rotation to align the point cloud along the y-axis. Now we have a problem with a second rotation
@Alessandro, You can find the directions of the principal axes by eigenvalue decomposition of the covariance matrix of the poin...
3 months ago | 0
Answered
I need help using the corrcoef function to calculate PRx (pressure reactivity index)
@Caleb, The pressure reactivity index is defined as "a moving correlation coefficient from 30 consecutive 10-s averages of ICP ...
I need help using the corrcoef function to calculate PRx (pressure reactivity index)
@Caleb, The pressure reactivity index is defined as "a moving correlation coefficient from 30 consecutive 10-s averages of ICP ...
3 months ago | 0
Answered
how i can modifiy the code to make the bandwith of fft less ?
@ANAS HAMZAH, To get the very narrow bandwidth shown inthe second plot in your PDF, you need to inccrease the duration of the s...
how i can modifiy the code to make the bandwith of fft less ?
@ANAS HAMZAH, To get the very narrow bandwidth shown inthe second plot in your PDF, you need to inccrease the duration of the s...
3 months ago | 0
Answered
Determining gait cycle from heel marker motion capture data
@Katie, Post some example data if you wish. Here is a paper I co-authored on the topic of identifying gait cycle during teadmi...
Determining gait cycle from heel marker motion capture data
@Katie, Post some example data if you wish. Here is a paper I co-authored on the topic of identifying gait cycle during teadmi...
4 months ago | 1
Answered
The Mathieu Equation—Stability for 2DOF whirlflutter system
@Nikoo, [Edit: Replaced scan of Figure 9 with a better scan that does not cut off the Y axis label.] You seek advice for code ...
The Mathieu Equation—Stability for 2DOF whirlflutter system
@Nikoo, [Edit: Replaced scan of Figure 9 with a better scan that does not cut off the Y axis label.] You seek advice for code ...
4 months ago | 0
Answered
Face Difficulty when converting tensorflow model to Matlab
@Ze, Your function compute_loss_gradients(...) calls function compute_loss3(). The call to compute_loss3(...) includes w_upd ...
Face Difficulty when converting tensorflow model to Matlab
@Ze, Your function compute_loss_gradients(...) calls function compute_loss3(). The call to compute_loss3(...) includes w_upd ...
4 months ago | 0
| accepted
Answered
MSSA method multichannel spectrum analysis
@ahmad Saad, I recommend that you do the Matlab tutorial on singular spectrum analysis here, then do the tutorial on multichann...
MSSA method multichannel spectrum analysis
@ahmad Saad, I recommend that you do the Matlab tutorial on singular spectrum analysis here, then do the tutorial on multichann...
4 months ago | 0
Answered
How do I download a .set file onto EEGLAB?
@Tyler, The .set files in EEGLAB have a complicated structure. The best way to get the data in a .set file into the Matlab wor...
How do I download a .set file onto EEGLAB?
@Tyler, The .set files in EEGLAB have a complicated structure. The best way to get the data in a .set file into the Matlab wor...
4 months ago | 0
Submitted
Cross Quantilogram Matrix
Estimate and plot cross quantilogram matrix.
4 months ago | 2 downloads |
Answered
How to plot cross quantile correltaion heatmap
@Hamid Muili, Some data: C=(0.71*rand(21,21)).^2; Plot the data x=0:.05:1; y=x; [X,Y]=meshgrid(x,y); surf(X,Y,C) colormap...
How to plot cross quantile correltaion heatmap
@Hamid Muili, Some data: C=(0.71*rand(21,21)).^2; Plot the data x=0:.05:1; y=x; [X,Y]=meshgrid(x,y); surf(X,Y,C) colormap...
4 months ago | 0
Answered
I want to plot same X axis and different Y axis like timing diagram
@Bahadir Guven, Make some simulated data: t=0:0.5:4.5; % time (ms) N=length(t); Va=randi([0,1],1,N); Vb=randi([0,1],1,N);...
I want to plot same X axis and different Y axis like timing diagram
@Bahadir Guven, Make some simulated data: t=0:0.5:4.5; % time (ms) N=length(t); Va=randi([0,1],1,N); Vb=randi([0,1],1,N);...
4 months ago | 1