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Parsing a file multiple entries consisting of strings. Each entry contains a header followed by a descriptor. The objective is to use headers to obtain a subset of entries.
The Bioinformatics Toolbox has a number of functions for these files. The fastaread function appears to be appropriate. (I don...

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Issues with understanding and interpreting single dimension FFT
It would help to have your data. 1 The 0 Hz value is high because that represents the mean of the time-domain signal. If yo...

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Scaling of Normal distribution - area under 'nompdf'
The trapz function can take the independent variable value as the fiirst argument (it otherwise assumes a step size of unity). ...

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How should I plot a square wave signal by utilising fourier series?
A relatively straightforward approach to creating a square wave pulse train from sinusoids is to do something like this — Fs =...

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Statistical Test for decaying signals
‘... each time point on each curve is produced by averaging from 100 taken data points ...’ The statistical test depends on w...

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How do Transfer my license from a 2015 Intel MacBook Air to a 2022 M2 MacBook air.
First, if you haven’t already done so, check the System Requirements to be certain R2017a will run on your new laptop. Then che...

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How to smoothen the noisy part of the data?
See if using the filloutliers function will do what you want — clc clear all close all %% Data have been sorted in x and ...

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3D vector plot having starting and ending points
It would help to have your code. The way I usually plot vectors in 3-space — x = [1 2]; y = [3 4]; z = [2 8]; figure ...

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Find average average value of data
To get the mean of each row, calculate the mean across dimension 2 (column size) — x=[ -81.12 -78.91 -73.64 -79.26 -155.66 ...

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Standard deviation for RMS comparison of two windows
Root-mean-square (RMS) calculations are best suited to estimate the D-C amplitude of a signal over long periods or the entire si...

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How can I calculate three different shaded areas?
Try this — T1 = readtable('example.xlsx') for k = 1:2:size(T1,2) xv = T1{:,k}; yv = T1{:,k+1}; idxrng = (xv ...

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How to use Matlab to find a pressure in a temperature and density spreadsheet using the nearest density value.
It would help to have your data. Use the scatteredInterpolant function to find (and if desired, plot) any value you want with...

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fplot with two y-axis
This seems to work — Sp = @(t) (5+sin(2*pi*log(t)))/750; St = @(t) (1+cos(1.5*pi*log(t)))/500; figure (10) yyaxis left f...

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Having trouble printing variables I use as inputs to a function.
The problem is that the ‘mass’ value provided to ‘MyFun2’ is zero, since the value being passed to it is ‘m’ and not ‘mass’ and ...

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synthetic data follow specific distribution
Choose the appropriate distribution and select the related function that produces random numbers. Examples are normrnd, poiss...

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Regarding precision and numerical instability in MATLAB
The problem of 16 parameters with 10 equations is not going to result in unique values for the 16 parameters, regardless of the ...

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Why does the value of tolerance stop at n=2 (third value of the iteration) within the while loop?
The loop appears to be working correctly. Adding ‘Check_Convergence’ and examiining the results demonstrates this — clear;c...

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How do I manually set color of individual datapoints of figure ?
Stiill lacking your data, I am guessing at the problem and proposing a solution. Try this — x = (0:14).'; ...

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Turn tables in a loop into a single cell array
Perhaps something like this — for k = 1:numel(OPALData) F = fullfile(OPALData(k).folder,OPALData(k).name); % I...

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fprintf not printing to command window when asking for input.
When I run your input line, it prints this to my Command Window: Enter the number of the song you wish to play --> and then...

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How do I manually set color of individual datapoints of figure ?
One option is to specify a colormap and then index into it — cm = turbo(5); Fs = 1000; t = linspace(0, 301, 302).'/Fs; E = ...

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Finding peaks in a very noisy signal
Your signals have broadband noiise, so a frequency-selective filter is not going to apply here. The Savitzky-Golay filter (or w...

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Loop for reading and extracting data from a single line of multiple text files.
I generally do something like this — files = dir('*.txt'); for k = 1:numel(files) txt = fileread(files(k).name); ...

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Monthly to annual totals
This is straightforward with the accumarray function — Y = 1960:1999; M = 1:12; Data = [[repmat(M(:), numel(Y), 1) repelem(Y(...

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Trouble Plotting Basic Function
It appears to be coded correctly. How is it supposed to appear? X = -4:0.01:10; Y = X.^3 - (sin(X)) - (exp(X)); figure...

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How to search and find array in array?
The ismember function is doing exactly what it should. You need to examine ‘bigArray’ tto understand its output. Try this — ...

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Update the number of columns needed for my times table
It would heelp to have your .csv file and a description of what you want to do. Also, it might be easiier to do this in a table...

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Segregating an EMG signal based on activation
It would help to ahve the data. Lacking it, I’ll create some. I generally approach ensemble problems such as yours like this...

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Phase Plots Dropping when quadrant changes
Use either the angle function or atan2d for this. The angle function returns the angle of a complex variable in radians, so you...

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How to remove border from MATLAB figure
It might be easier to do that when you first create the spectrogram. Try something like this — Fs = 1000; L = 10; t = li...

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