回答済み
Prepare Fourier Amplitude Spectrum from ground motion record (Peak-Acceleration vs time-period)
Perhaps this — T1 = readtable('india.19911019...at_output.txt'); T1.Properties.VariableNames = {'Peak Acceleration','Time'} ...

29日 前 | 0

回答済み
Other ways to improve fft amplitude
Another option may be to zero-pad the fft using: Fs = signal_sampling_frequency L = signal_length; NFFT = 2^nextpow2(L) FTs...

29日 前 | 1

| 採用済み

回答済み
How can I write a set of first order ODEs with two variables?
Try something like this — syms D g m t x(t) y(t) Y dx = diff(x); d2x = diff(dx); dy = diff(y); d2y = diff(dy); DEqn1 ...

約1ヶ月 前 | 1

回答済み
Recover signal from single-sided spectrum using ifft
The problem appears (to me) that you are using the absolute value (‘P2’) of the fft result. This essentially discards the phase...

約1ヶ月 前 | 0

回答済み
FFT to a simple sine wave
I am not certain what the independent variable axis is (the label is cut off), however if you want a power spectral density plot...

約1ヶ月 前 | 0

回答済み
I am recieving an error in creating the solution however it still prints a result.
In the last iteration of the loop, the results are all empty. One way to avoid the error is to test for at least one field to ...

約1ヶ月 前 | 0

| 採用済み

回答済み
Solving ODE using laplace
Your code looks correct to me, and when I checked the result with dsolve, its solution agreees with yours — syms t s y(t) Y X ...

約1ヶ月 前 | 0

回答済み
Old Matlab example of 1D FFT filter
The only function that I am aware of that might do what you want is the fftfilt function (introduced before R2006a). It require...

約1ヶ月 前 | 0

| 採用済み

回答済み
Plot a vector with a given angle against the y-axis
Another approach — thetad = 280; % Desired Angle (Guessing Value) x...

約1ヶ月 前 | 0

回答済み
Decreasing bin size FFT options for increased resolution
You can minimise the spectral leakage by windowing the fft (except for a rectangular window, which is the default if no others a...

約1ヶ月 前 | 0

| 採用済み

回答済み
Could anyone explain the example provided in thr help for understanding the use of fft?
This calculation of the frequency vector for the displayed Fourier transform is not the easiest to understand: f = Fs*(0:(L/2)...

約1ヶ月 前 | 0

| 採用済み

回答済み
Need help in assigning frequency and normalising amplitude to the fft plot
There may be several approaches to your problem. One of them is this — clear all close all clc L=10; n=1.45; c=2.9979e...

約1ヶ月 前 | 0

| 採用済み

回答済み
Left and Right side have different elements
You need to subscript ‘t’. Then, it works — t = 0:0.01:4; % Timesteps for robotic arm motion for i = 1:length(t...

約1ヶ月 前 | 0

回答済み
Error using Odearguments - vector must return a column
You only have one differential equation, so only one initial condition is necessary. %r_H2= -(-Rds - Rwf - Rh); %Rd = kds*(C...

約1ヶ月 前 | 0

| 採用済み

回答済み
I want to change the symbolic variables in my matrix to numbers
Use the fplot function — clear all ; close all; close ; clear syms s Expr = (sin(s)); F1 = int(Expr) syms n expr2 = 1/n ...

約1ヶ月 前 | 0

| 採用済み

回答済み
How to remove (or isolate) side peaks except main peak after FFT
Using: NFFT = 2^nextpow2(numel(signal)) and a window function (for example hann) in the fft call could improve the fft result...

約1ヶ月 前 | 0

回答済み
Trying to combine two IR spectra where x is wavenumber (cm-1) and y is transmittance (0 to 1), having trouble.
It would help to have the data. The best way is probably to interpolate the longer series to the length of the shorter series...

約1ヶ月 前 | 0

回答済み
Tornado chart with colormap gradient
Perhaps something like this — % Data data = [0.496; % Electrical conversion efficiency 0.426; % Biogas efficiency val...

約1ヶ月 前 | 0

回答済み
I'm trying to find displacement from acceleration datas
Your original ac celeration data have a trend, and you are integrating the trend. Use the detrend function tto remove it (alter...

約1ヶ月 前 | 0

回答済み
Fitting an anonymous function: Debye Callaway Model
I do not have your data so I cannot run your code. However it is always appropriate to compltely vectorise objective function...

約1ヶ月 前 | 0

回答済み
How to Reshape a Matrix into a Cell
Transpose the row vector, call reshape, then transpose that result — syms R11 R12 R13 R21 R22 R23 R31 R32 R33 k = 1; timest...

約1ヶ月 前 | 0

回答済み
Curve fit autocatalytic model
if ‘x’ is greater than 1 and ‘n’ is not an integer, the result will be complex. Example — k = rand m = rand n = rand x ...

約1ヶ月 前 | 0

回答済み
fsolve function not solving nonlinear equations, I had observed "Invalid datatype. Options argument must be created with OPTIMOPTIONS"; could you assist me, pse
One problem is that fsolve wants the initial parameter estimates as a single vector, and the third argument is the ‘options’ str...

約1ヶ月 前 | 0

| 採用済み

回答済み
apply hanning window for signal processing
I do not understand your code, so I am not certain where to suggest adding the hann call in that context. (I specifically do no...

約1ヶ月 前 | 0

回答済み
How to assign new variables?
Use the strrep function instead of the if block — jj = 1; dependent_vars{jj} = 'act_per_ha'; jj = 2; dependent_vars{jj} = ...

約1ヶ月 前 | 0

回答済み
Latex, sprintf and variable that changes
Your sprintf statement has fields for 3 variables, however you only provide 2. Provide all 3 and it works — i = 1; j = 1; ...

約1ヶ月 前 | 0

| 採用済み

回答済み
Why I have the error Genetic algorithm script error no Global Optimization Toolbox ?
You have to license, download and install the Global Optimization Toolbox. There is no separate license for gamultobj. You m...

約1ヶ月 前 | 0

回答済み
I need to plot precipitation data. First, adjust y limits of a stacked plot to accommodate totals for the month. Second, have dates on the x axis.
Convert the table to a timetablee and ‘Column2’ will automatically be plotted as a funciton of the time variable. However I d...

約1ヶ月 前 | 1

回答済み
How to get the Z-transform and tf of this function y[n] = 0,5y[n − 1] + x[n] ?
Perhaps something like this — syms n x(n) y(n) z t X(z) Y(z) assume(n>=0 & in(n,"integer")) Eqn = y(n) == 0.5*y(n - 1) + x(...

約1ヶ月 前 | 0

回答済み
Finding and integrating peaks in a data array
The findpeaks function will accurately locate the peaks. Integrating them depends on what you want to do. In the past, I have ...

約1ヶ月 前 | 0

さらに読み込む