답변 있음
How to upsample an ECG signal and its associated data?
Use the resample function to upsample it, since this function is specifically designed for signal processing, and contains an an...

대략 1개월 전 | 0

답변 있음
I am having trouble reading a txt file
You may need to specify the name-value pair: 'EndOfLine','\r\n' That has usually been the solution when I have encountered si...

대략 1개월 전 | 0

| 수락됨

답변 있음
How can I "connect" the colorbar to my values of a scatter plot?
I am not certain what you want to do, or what you intend by ‘connect’. One option — a = rand(1000,1); % C = 1-[a a a]; C ...

대략 1개월 전 | 1

| 수락됨

답변 있음
Assistance Needed to Determine Noise in ECG Dataset
It does not appear to be excessively noisy. There is some baseline variation, however this is not present in every lead and is ...

대략 1개월 전 | 0

| 수락됨

답변 있음
Import timestamps with alternating date formats
It does not actually appear to be alternating, although the trailing zeros on some may indicate that the time is not exactly tho...

대략 1개월 전 | 0

| 수락됨

답변 있음
How to find peaks in timeseries data?
Your code works when I run it, alhough not all ‘location_data’ vectors have identifiable peaks (all below the 'MinPeakHeight' va...

대략 1개월 전 | 0

답변 있음
Intersection of Discretized Curves
It would help to have the data. TThe approach to these problems is straightforward. In this instance, the independent variab...

대략 1개월 전 | 0

| 수락됨

답변 있음
Lowpass vs bandpass filtering
The functions may by default design a FIR filter, and FIR filters have problems with some signals, since the FIR filter order ma...

대략 1개월 전 | 0

답변 있음
Plotting error bars on curve
I really can’t do anything without the data. The rest of the code (that imports the data and processes it including calculating...

대략 1개월 전 | 0

| 수락됨

답변 있음
3D Figure from Excel (x,y,z)
It always helps to have your data. A picture may be worth a thousand words, however on MATLAB Answers, data is worth a thousand...

대략 1개월 전 | 0

| 수락됨

답변 있음
MATLAB FFT bin size
I agree with @Steven Lord, however there are ways to do what you want with the MATLAB fft function. I wrote a small utility fun...

대략 1개월 전 | 1

| 수락됨

답변 있음
I would like to plot an interpolated 3d Surface between two faces, i.e. the third face of a truncated cone. my plot isn't working but I'm not sure what is wrong
TThis does not look like a cone to me at all. What do you want to do? r1=0.5; % t1=[(0:0.1:2*pi),0]; t1=0:0.1:2*pi; X1=...

대략 1개월 전 | 0

| 수락됨

답변 있음
Strange issue with mean, max, and min of vector?
See the plotted values — load('diffT.mat') whos('-file','diffT') % diffT neg_vals = nnz(diffT < 0) [lo,hi] = bounds(d...

대략 1개월 전 | 0

| 수락됨

답변 있음
How to iterate over data sets?
If you have the Signal Processing Toolbox, use the buffer function for this. dummy1 = (1:60).' bfr1 = buffer(dummy1, 12); ...

대략 1개월 전 | 0

답변 있음
File Issues after copying from another PC
The resample function is part of the Signal Processing Toolbox. You need to have the Toolbox licensed and installed before you ...

대략 1개월 전 | 1

| 수락됨

답변 있음
Removing outliers from the data creates gaps. Filling these gaps with missing values or the median of surrounding values does not address the issue.Why?
Your version/release is not stated, however beginning with R2017a, the filloutliers function has been available. Using the 'med...

대략 1개월 전 | 0

| 수락됨

답변 있음
How do I find the x and y coordinates of a fitted Gaussian curve at a given slope?
Once you have the equation for the gaussian, the rest is striaightforward. Find the midpoint in the mamplitude to determine th...

대략 1개월 전 | 0

답변 있음
Optimal Cutoff Frequency for Static Noise Detection in ECG Signals?
You have not defined ‘static noise’ so I have no idea what you’re actually filtering. The bandwidth of a normal EKG is genera...

대략 1개월 전 | 0

| 수락됨

답변 있음
How do I calculate the duration between two times?
This seems to work — load('results_start_array.mat') whos('-file','results_start_array.mat') load('results_start_end.mat')...

대략 1개월 전 | 0

| 수락됨

답변 있음
how to fill color in 1/4 th circle
A new function in R2024a is the polarregion function. Try this — figure thetas1 = [0.5 1]*pi; radii1 = [1 2]; polarregi...

대략 1개월 전 | 0

답변 있음
How to interpolate values given a starting and end point
Use the rescale function — Vrec = [18.2, 18.1, 18.0, 17.9]; Vrange = [50.6 50.3]; Vres = rescale(Vrec, Vrange(2), Vrange(1...

대략 1개월 전 | 0

| 수락됨

답변 있음
How can i make 3D graph with multiple 2D graphs?
If the vectors all have the same sizes, just plot them as a matrix using the surf function. t = linspace(0, 1, 25).'; ...

대략 1개월 전 | 2

| 수락됨

답변 있음
How to change the spectrogram magnitude to linear?
I susp[ect that you may actually want to use the pspectrum function with the 'spectrogram' type. To understand the differences ...

대략 1개월 전 | 0

답변 있음
Best analysis to show how EEG ranges are similar
I’m not certain what you actually want to do. I would be tempted to use Fourier transforms, specifically stft, and compare th...

대략 1개월 전 | 0

답변 있음
How to solve non_linear equation
Solve it symbolically — syms z Eqn = z^3 == log(z)*(482036/0.18525)^5 Z = solve(Eqn) Z = vpa(Z) format longG Zd = doub...

대략 1개월 전 | 0

| 수락됨

답변 있음
How to find the intersection of linear regression model and yline
Use the interp1 function for this — T(:,1) = [0 1 2 3 4 5].'; T(:,2) = [0 1 2 3 4 5].'; x = T(:,1); y = T(:,2); p = poly...

대략 1개월 전 | 0

| 수락됨

답변 있음
I am getting this warning "Matrix is singular to working precision." and my surf plot is not showing.
You need to do element-wise opeerations in your ‘u’ function, so: u = @(x,y)(-4*pi*exp(-5*pi*pi*0.5).*cos(2*pi*x).*sin(pi*y))....

대략 1개월 전 | 1

| 수락됨

답변 있음
Designing Yulewalk Filter for a Bandpass Type
The yulewalk filter will be a FIR filter, whiel the original filter is an IIR filter. A FIR filter generally requires a much hi...

대략 2개월 전 | 0

답변 있음
Confidence interval calculation. Cannot compute confidence interval for imaginary values.
The parameters aren’t complex. All the results are real. The problem with your code is that in MATLAB, function arguments an...

대략 2개월 전 | 0

| 수락됨

답변 있음
How to correct the recording of a daamaged accelerometer in earthquake analysis
If you have the Signal Ptocessing Toolbox, an alternative approach would be to use the highpass (or bandpass to also eliminiate...

대략 2개월 전 | 0

| 수락됨